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Mücke R, Heim G, Gosenheimer R, Schmitz V, Schulz C, Knoeß P, Fakhrian K, Harvey C, Mücke C, Lochhas G, Metzmann U, Bussmann M, Paschold M. Radiation therapy of breast cancer in the Nahe Breast Center: first results of an analysis in the context of health services research. Strahlenther Onkol 2024; 200:314-319. [PMID: 37947805 DOI: 10.1007/s00066-023-02157-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/10/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND The first evaluation of radiotherapy results in patients with breast cancer treated as part of a multimodal oncologic therapy in the Nahe Breast Center is presented. Analysis of the results was performed using an in-practice registry. PATIENTS AND METHODS From September 2016 to December 2017, 138 patients (median age 62.5 years; range 36-94 years) with breast cancer (right side, n = 67; left side, n = 71) received adjuvant radiation therapy. Of these, 103 patients received gyneco-oncologic care at the Nahe Breast Center, and 35 were referred from outside breast centers. The distribution into stages was as follows: stage I, n = 48; stage II, n = 68; stage III, n = 19; stage IV, n = 3. Neoadjuvant chemotherapy was given to 19 and adjuvant chemotherapy to 50 patients. Endocrine treatment was given to 120 patients. Both 3D conformal (n = 103) and intensity-modulated (n = 35) radiotherapy were performed with a modern linear accelerator. RESULTS With a median follow-up of 60 months (1-67), local recurrence occurred in 4/138 (2.9%) and distant metastasis in 8/138 (5.8%) patients; 7/138 (5.1%) patients died of their tumors during the follow-up period. The actuarial 5‑year local recurrence-free survival of all patients was 97.1%, and the actuarial 5‑year overall survival of all patients was 94.9%. We observed no grade 3 or 4 radiogenic side effects. CONCLUSION The results of radiotherapy for breast carcinoma at the Nahe Breast Center are comparable to published national and international results. In particular, the local recurrence rates in our study, determined absolutely and actuarially, are excellent, and demonstrate the usefulness of radiotherapy.
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Affiliation(s)
- Ralph Mücke
- Radiotherapy RheinMainNahe, Mainz-Ruesselsheim-Bad Kreuznach, Mühlenstraße 39a, 55543, Bad Kreuznach, Germany.
- Department of Radiotherapy and Radiation Oncology, Marien Hospital Herne, Ruhr University Bochum, Bochum, Germany.
| | - Gabor Heim
- Department of Gynecology, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | - Robert Gosenheimer
- Department of Internal Medicine, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | - Volker Schmitz
- Department of Internal Medicine, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | | | - Per Knoeß
- Institute of Pathology, Bad Kreuznach, Germany
| | | | - Christina Harvey
- Department of Internal Medicine, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | - Christiane Mücke
- Radiotherapy RheinMainNahe, Mainz-Ruesselsheim-Bad Kreuznach, Mühlenstraße 39a, 55543, Bad Kreuznach, Germany
| | - Gabriele Lochhas
- Radiotherapy RheinMainNahe, Mainz-Ruesselsheim-Bad Kreuznach, Mühlenstraße 39a, 55543, Bad Kreuznach, Germany
| | - Ute Metzmann
- Radiotherapy RheinMainNahe, Mainz-Ruesselsheim-Bad Kreuznach, Mühlenstraße 39a, 55543, Bad Kreuznach, Germany
| | - Matthias Bussmann
- Medical Management Board, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | - Markus Paschold
- Department of Surgery, Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
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Siltari A, Lönnerbro R, Pang K, Shiranov K, Asiimwe A, Evans-Axelsson S, Franks B, Kiran A, Murtola TJ, Schalken J, Steinbeisser C, Bjartell A, Auvinen A, Smith E, N'Dow J, Plass K, Ribal M, Mottet N, Moris L, Lardas M, Van den Broeck T, Willemse PP, Gandaglia G, Campi R, Greco I, Gacci M, Serni S, Briganti A, Crosti D, Meoni M, Garzonio R, Bangma R, Roobol M, Remmers S, Tilki D, Visakorpi T, Talala K, Tammela T, van Hemelrijck M, Bayer K, Lejeune S, Taxiarchopoulou G, van Diggelen F, Senthilkumar K, Schutte S, Byrne S, Fialho L, Cardone A, Gono P, De Vetter M, Ceke K, De Meulder B, Auffray C, Balaur IA, Taibi N, Power S, Kermani NZ, van Bochove K, Cavelaars M, Moinat M, Voss E, Bernini C, Horgan D, Fullwood L, Holtorf M, Lancet D, Bernstein G, Omar I, MacLennan S, Maclennan S, Healey J, Huber J, Wirth M, Froehner M, Brenner B, Borkowetz A, Thomas C, Horn F, Reiche K, Kreux M, Josefsson A, Tandefekt DG, Hugosson J, Huisman H, Hofmacher T, Lindgren P, Andersson E, Fridhammar A, Vizcaya D, Verholen F, Zong J, Butler-Ransohoff JE, Williamson T, Chandrawansa K, Dlamini D, waldeck R, Molnar M, Bruno A, Herrera R, Jiang S, Nevedomskaya E, Fatoba S, Constantinovici N, Maass M, Torremante P, Voss M, Devecseri Z, Cuperus G, Abott T, Dau C, Papineni K, Wang-Silvanto J, Hass S, Snijder R, Doye V, Wang X, Garnham A, Lambrecht M, Wolfinger R, Rogiers S, Servan A, Lefresne F, Caseriego J, Samir M, Lawson J, Pacoe K, Robinson P, Jaton B, Bakkard D, Turunen H, Kilkku O, Pohjanjousi P, Voima O, Nevalaita L, Reich C, Araujo S, Longden-Chapman E, Burke D, Agapow P, Derkits S, Licour M, McCrea C, Payne S, Yong A, Thompson L, Lujan F, Bussmann M, Köhler I. How well do polygenic risk scores identify men at high risk for prostate cancer? Systematic review and meta-analysis. Clin Genitourin Cancer 2022; 21:316.e1-316.e11. [PMID: 36243664 DOI: 10.1016/j.clgc.2022.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Genome-wide association studies have revealed over 200 genetic susceptibility loci for prostate cancer (PCa). By combining them, polygenic risk scores (PRS) can be generated to predict risk of PCa. We summarize the published evidence and conduct meta-analyses of PRS as a predictor of PCa risk in Caucasian men. PATIENTS AND METHODS Data were extracted from 59 studies, with 16 studies including 17 separate analyses used in the main meta-analysis with a total of 20,786 cases and 69,106 controls identified through a systematic search of ten databases. Random effects meta-analysis was used to obtain pooled estimates of area under the receiver-operating characteristic curve (AUC). Meta-regression was used to assess the impact of number of single-nucleotide polymorphisms (SNPs) incorporated in PRS on AUC. Heterogeneity is expressed as I2 scores. Publication bias was evaluated using funnel plots and Egger tests. RESULTS The ability of PRS to identify men with PCa was modest (pooled AUC 0.63, 95% CI 0.62-0.64) with moderate consistency (I2 64%). Combining PRS with clinical variables increased the pooled AUC to 0.74 (0.68-0.81). Meta-regression showed only negligible increase in AUC for adding incremental SNPs. Despite moderate heterogeneity, publication bias was not evident. CONCLUSION Typically, PRS accuracy is comparable to PSA or family history with a pooled AUC value 0.63 indicating mediocre performance for PRS alone.
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N’Dow J, Smith E, Polychronopoulos K, Cannon A, Roobol M, Auweter S, Thomas M, Kremer A, De Meulder B, Dellamonica D, Alhambra D, Asiimwe A, Bussmann M, Ji X, Torremante P, Keller S, Kube F, Krueger H. 917P OPTIMA: Improve care for patients with prostate, breast, and lung cancer through artificial intelligence. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Muecke R, Gosenheimer R, Schulz C, Heim G, Schmitz V, Harvey C, Zosel-DeIturri A, Nissen A, Hemberger U, Romeis V, Lochhas G, Metzmann U, Bussmann M, Paschold M. Counseling on Complementary Methods in the Treatment of Side Effects of Oncological Therapies: A Project of the Breast and Bowel Center Nahe at the Hospital Sankt Marienwoerth Bad Kreuznach. Integr Cancer Ther 2021; 20:15347354211043199. [PMID: 34581221 PMCID: PMC8481747 DOI: 10.1177/15347354211043199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Increasingly, patients with cancer are asking for additional, complementary therapy options for treating the side effects of oncological therapy. Thus, the members of the Breast and Bowel Center Nahe at the Sankt Marienwörth Hospital Bad Kreuznach decided to define the content of this type of counseling for patients before treatment. METHODS In 2018, a team of internal oncologists, gynecological oncologists, radio-oncologists, nutritionists, psycho-oncologists, and study nurses met several times to define the content of counseling. To inform the team, an intensive literature review was conducted. RESULTS Counseling content was determined for complementary treatment options for the most frequent side effects of oncological therapies. Counseling sessions were formulated as frontal lectures (slide presentations), given at regular intervals for patients and relatives. These lectures were highly appreciated by patients. CONCLUSION These counseling sessions increased patient understanding of both useful complementary measures and harmful measures they should not use.
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Affiliation(s)
- Ralph Muecke
- Mainz-Ruesselsheim-Bad Kreuznach, Bad Kreuznach, Germany.,Ruhr University Bochum, Bochum, Germany.,German Cancer Society, Berlin, Germany
| | | | | | - Gabor Heim
- Hospital Sankt Marienwoerth, Bad Kreuznach, Germany
| | | | | | | | | | | | | | | | - Ute Metzmann
- Mainz-Ruesselsheim-Bad Kreuznach, Bad Kreuznach, Germany
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Winzen D, Hannen V, Bussmann M, Buß A, Egelkamp C, Eidam L, Huang Z, Kiefer D, Klammes S, Kühl T, Loeser M, Ma X, Nörtershäuser W, Ortjohann HW, Sánchez R, Siebold M, Stöhlker T, Ullmann J, Vollbrecht J, Walther T, Wang H, Weinheimer C, Winters DFA. Publisher Correction: Laser spectroscopy of the [Formula: see text], [Formula: see text] transitions in stored and cooled relativistic [Formula: see text] ions. Sci Rep 2021; 11:17660. [PMID: 34462550 PMCID: PMC8405785 DOI: 10.1038/s41598-021-97511-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- D. Winzen
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - V. Hannen
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - M. Bussmann
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - A. Buß
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - C. Egelkamp
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - L. Eidam
- Institute for Accelerator Science and Electromagnetic Fields, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Z. Huang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - D. Kiefer
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - S. Klammes
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - Th. Kühl
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute of Physics, University of Mainz, 55099 Mainz, Germany
| | - M. Loeser
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - X. Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - W. Nörtershäuser
- Institute for Nuclear Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Centre for Heavy Ion Research, Campus Darmstadt, Darmstadt, Germany
| | - H.-W. Ortjohann
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - R. Sánchez
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - M. Siebold
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - Th. Stöhlker
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute for Optics and Quantum Electronics, University of Jena, 07743 Jena, Germany
| | - J. Ullmann
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute for Nuclear Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Institute for Optics and Quantum Electronics, University of Jena, 07743 Jena, Germany
| | - J. Vollbrecht
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - Th. Walther
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Centre for Heavy Ion Research, Campus Darmstadt, Darmstadt, Germany
| | - H. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - Ch. Weinheimer
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - D. F. A. Winters
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
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6
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Winzen D, Hannen V, Bussmann M, Buß A, Egelkamp C, Eidam L, Huang Z, Kiefer D, Klammes S, Kühl T, Loeser M, Ma X, Nörtershäuser W, Ortjohann HW, Sánchez R, Siebold M, Stöhlker T, Ullmann J, Vollbrecht J, Walther T, Wang H, Weinheimer C, Winters DFA. Laser spectroscopy of the [Formula: see text], [Formula: see text] transitions in stored and cooled relativistic C[Formula: see text] ions. Sci Rep 2021; 11:9370. [PMID: 33931715 PMCID: PMC8087675 DOI: 10.1038/s41598-021-88926-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 04/19/2021] [Indexed: 11/30/2022] Open
Abstract
The [Formula: see text] and [Formula: see text] transitions in Li-like carbon ions stored and cooled at a velocity of [Formula: see text] in the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt have been investigated in a laser spectroscopy experiment. Resonance wavelengths were obtained using a new continuous-wave UV laser system and a novel extreme UV (XUV) detection system to detect forward emitted fluorescence photons. The results obtained for the two transitions are compared to existing experimental and theoretical data. A discrepancy found in an earlier laser spectroscopy measurement at the ESR with results from plasma spectroscopy and interferometry has been resolved and agreement between experiment and theory is confirmed.
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Affiliation(s)
- D. Winzen
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - V. Hannen
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - M. Bussmann
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - A. Buß
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - C. Egelkamp
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - L. Eidam
- Institute for Accelerator Science and Electromagnetic Fields, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Z. Huang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - D. Kiefer
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - S. Klammes
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - Th. Kühl
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute of Physics, University of Mainz, 55099 Mainz, Germany
| | - M. Loeser
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - X. Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - W. Nörtershäuser
- Institute for Nuclear Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Centre for Heavy Ion Research, Campus Darmstadt, Darmstadt, Germany
| | - H.-W. Ortjohann
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - R. Sánchez
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
| | - M. Siebold
- Helmholtz Center Dresden-Rossendorf, 01328 Dresden, Germany
| | - Th. Stöhlker
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute for Optics and Quantum Electronics, University of Jena, 07743 Jena, Germany
| | - J. Ullmann
- Helmholtz Institute Jena, 07743 Jena, Germany
- Institute for Nuclear Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Institute for Optics and Quantum Electronics, University of Jena, 07743 Jena, Germany
| | - J. Vollbrecht
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - Th. Walther
- Institute for Applied Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Centre for Heavy Ion Research, Campus Darmstadt, Darmstadt, Germany
| | - H. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 China
| | - Ch. Weinheimer
- Institute for Nuclear Physics, University of Münster, 48149 Münster, Germany
| | - D. F. A. Winters
- GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
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Martinez de la Ossa A, Assmann RW, Bussmann M, Corde S, Couperus Cabadağ JP, Debus A, Döpp A, Ferran Pousa A, Gilljohann MF, Heinemann T, Hidding B, Irman A, Karsch S, Kononenko O, Kurz T, Osterhoff J, Pausch R, Schöbel S, Schramm U. Hybrid LWFA-PWFA staging as a beam energy and brightness transformer: conceptual design and simulations. Philos Trans A Math Phys Eng Sci 2019; 377:20180175. [PMID: 31230579 PMCID: PMC6602909 DOI: 10.1098/rsta.2018.0175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
We present a conceptual design for a hybrid laser-driven plasma wakefield accelerator (LWFA) to beam-driven plasma wakefield accelerator (PWFA). In this set-up, the output beams from an LWFA stage are used as input beams of a new PWFA stage. In the PWFA stage, a new witness beam of largely increased quality can be produced and accelerated to higher energies. The feasibility and the potential of this concept is shown through exemplary particle-in-cell simulations. In addition, preliminary simulation results for a proof-of-concept experiment in Helmholtz-Zentrum Dresden-Rossendorf (Germany) are shown. This article is part of the Theo Murphy meeting issue 'Directions in particle beam-driven plasma wakefield acceleration'.
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Affiliation(s)
| | - R. W. Assmann
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - M. Bussmann
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - S. Corde
- LOA, ENSTA ParisTech - CNRS - École Polytechnique - Université Paris-Saclay, France
| | | | - A. Debus
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - A. Döpp
- Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748 Garching, Germany
| | - A. Ferran Pousa
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - M. F. Gilljohann
- Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748 Garching, Germany
| | - T. Heinemann
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
- Department of Physics, Scottish Universities Physics Alliance, University of Strathclyde, Glasgow G4 0NG, UK
| | - B. Hidding
- Department of Physics, Scottish Universities Physics Alliance, University of Strathclyde, Glasgow G4 0NG, UK
| | - A. Irman
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - S. Karsch
- Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748 Garching, Germany
| | - O. Kononenko
- LOA, ENSTA ParisTech - CNRS - École Polytechnique - Université Paris-Saclay, France
| | - T. Kurz
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - J. Osterhoff
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - R. Pausch
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - S. Schöbel
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
| | - U. Schramm
- Helmholtz-Zentrum Dresden-Rossendorf HZDR, 01328 Dresden, Germany
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8
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Pausch R, Bussmann M, Huebl A, Schramm U, Steiniger K, Widera R, Debus A. Identifying the linear phase of the relativistic Kelvin-Helmholtz instability and measuring its growth rate via radiation. Phys Rev E 2018; 96:013316. [PMID: 29347084 DOI: 10.1103/physreve.96.013316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 11/07/2022]
Abstract
For the relativistic Kelvin-Helmholtz instability (KHI), which occurs at shear interfaces between two plasma streams, we report results on the polarized radiation over all observation directions and frequencies emitted by the plasma electrons from ab initio kinetic simulations. We find the polarization of the radiation to provide a clear signature for distinguishing the linear phase of the KHI from its other phases. During the linear phase, we predict the growth rate of the KHI radiation power to match the growth rate of the KHI to a high degree. Our predictions are based on a model of the vortex dynamics, which describes the electron motion in the vicinity of the shear interface between the two streams. Albeit the complex and turbulent dynamics happening in the shear region, we find excellent agreement between our model and large-scale particle-in-cell simulations. Our findings pave the way for identifying the KHI linear regime and for measuring its growth rate in astrophysical jets observable on earth as well as in laboratory plasmas.
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Affiliation(s)
- R Pausch
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Technische Universität Dresden, 01062 Dresden, Germany
| | - M Bussmann
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - A Huebl
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Technische Universität Dresden, 01062 Dresden, Germany
| | - U Schramm
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Technische Universität Dresden, 01062 Dresden, Germany
| | - K Steiniger
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Technische Universität Dresden, 01062 Dresden, Germany
| | - R Widera
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - A Debus
- Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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9
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Couperus JP, Pausch R, Köhler A, Zarini O, Krämer JM, Garten M, Huebl A, Gebhardt R, Helbig U, Bock S, Zeil K, Debus A, Bussmann M, Schramm U, Irman A. Demonstration of a beam loaded nanocoulomb-class laser wakefield accelerator. Nat Commun 2017; 8:487. [PMID: 28887456 PMCID: PMC5591198 DOI: 10.1038/s41467-017-00592-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022] Open
Abstract
Laser-plasma wakefield accelerators have seen tremendous progress, now capable of producing quasi-monoenergetic electron beams in the GeV energy range with few-femtoseconds bunch duration. Scaling these accelerators to the nanocoulomb range would yield hundreds of kiloamperes peak current and stimulate the next generation of radiation sources covering high-field THz, high-brightness X-ray and γ-ray sources, compact free-electron lasers and laboratory-size beam-driven plasma accelerators. However, accelerators generating such currents operate in the beam loading regime where the accelerating field is strongly modified by the self-fields of the injected bunch, potentially deteriorating key beam parameters. Here we demonstrate that, if appropriately controlled, the beam loading effect can be employed to improve the accelerator's performance. Self-truncated ionization injection enables loading of unprecedented charges of ∼0.5 nC within a mono-energetic peak. As the energy balance is reached, we show that the accelerator operates at the theoretically predicted optimal loading condition and the final energy spread is minimized.Higher beam quality and stability are desired in laser-plasma accelerators for their applications in compact light sources. Here the authors demonstrate in laser plasma wakefield electron acceleration that the beam loading effect can be employed to improve beam quality by controlling the beam charge.
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Affiliation(s)
- J P Couperus
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany.
- Technische Universität Dresden, 01062, Dresden, Germany.
| | - R Pausch
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - A Köhler
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - O Zarini
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - J M Krämer
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - M Garten
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - A Huebl
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - R Gebhardt
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - U Helbig
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - S Bock
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - K Zeil
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - A Debus
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - M Bussmann
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - U Schramm
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - A Irman
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Bautzner Landstrasse 400, 01328, Dresden, Germany.
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Schramm U, Bussmann M, Irman A, Siebold M, Zeil K, Albach D, Bernert C, Bock S, Brack F, Branco J, Couperus JP, Cowan TE, Debus A, Eisenmann C, Garten M, Gebhardt R, Grams S, Helbig U, Huebl A, Kluge T, Köhler A, Krämer JM, Kraft S, Kroll F, Kuntzsch M, Lehnert U, Loeser M, Metzkes J, Michel P, Obst L, Pausch R, Rehwald M, Sauerbrey R, Schlenvoigt HP, Steiniger K, Zarini O. First results with the novel petawatt laser acceleration facility in Dresden. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/874/1/012028] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Walker PA, Alesini PD, Alexandrova AS, Anania MP, Andreev NE, Andriyash I, Aschikhin A, Assmann RW, Audet T, Bacci A, Barna IF, Beaton A, Beck A, Beluze A, Bernhard A, Bielawski S, Bisesto FG, Boedewadt J, Brandi F, Bringer O, Brinkmann R, Bründermann E, Büscher M, Bussmann M, Bussolino GC, Chance A, Chanteloup JC, Chen M, Chiadroni E, Cianchi A, Clarke J, Cole J, Couprie ME, Croia M, Cros B, Dale J, Dattoli G, Delerue N, Delferriere O, Delinikolas P, Dias J, Dorda U, Ertel K, Ferran Pousa A, Ferrario M, Filippi F, Fils J, Fiorito R, Fonseca RA, Galimberti M, Gallo A, Garzella D, Gastinel P, Giove D, Giribono A, Gizzi LA, Grüner FJ, Habib AF, Haefner LC, Heinemann T, Hidding B, Holzer BJ, Hooker SM, Hosokai T, Irman A, Jaroszynski DA, Jaster-Merz S, Joshi C, Kaluza MC, Kando M, Karger OS, Karsch S, Khazanov E, Khikhlukha D, Knetsch A, Kocon D, Koester P, Kononenko O, Korn G, Kostyukov I, Labate L, Lechner C, Leemans WP, Lehrach A, Li FY, Li X, Libov V, Lifschitz A, Litvinenko V, Lu W, Maier AR, Malka V, Manahan GG, Mangles SPD, Marchetti B, Marocchino A, Martinez de la Ossa A, Martins JL, Massimo F, Mathieu F, Maynard G, Mehrling TJ, Molodozhentsev AY, Mosnier A, Mostacci A, Mueller AS, Najmudin Z, Nghiem PAP, Nguyen F, Niknejadi P, Osterhoff J, Papadopoulos D, Patrizi B, Pattathil R, Petrillo V, Pocsai MA, Poder K, Pompili R, Pribyl L, Pugacheva D, Romeo S, Rossi AR, Roussel E, Sahai AA, Scherkl P, Schramm U, Schroeder CB, Schwindling J, Scifo J, Serafini L, Sheng ZM, Silva LO, Silva T, Simon C, Sinha U, Specka A, Streeter MJV, Svystun EN, Symes D, Szwaj C, Tauscher G, Thomas AGR, Thompson N, Toci G, Tomassini P, Vaccarezza C, Vannini M, Vieira JM, Villa F, Wahlström CG, Walczak R, Weikum MK, Welsch CP, Wiemann C, Wolfenden J, Xia G, Yabashi M, Yu L, Zhu J, Zigler A. Horizon 2020 EuPRAXIA design study. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/874/1/012029] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schellhammer S, Oborn B, Lühr A, Gantz S, Wohlfahrt P, Bussmann M, Hoffmann A. OC-0343: Experimental setup to measure magnetic field effects of proton dose distributions: simulation study. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30785-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Scherer M, König M, Breitbach M, Cornelius S, Bussmann M, Prochnow A, Peist R. Improving sample analysis and interpretation using QIAGEN’s latest Investigator ® STR multiplex PCR assays with a novel quality sensor. Forensic Science International: Genetics Supplement Series 2015. [DOI: 10.1016/j.fsigss.2015.09.122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Masood U, Baumann M, Bussmann M, Cowan T, Enghardt W, Herrmannsdoerfer T, Hofmann K, Kaluza M, Karsch L, Kroll F, Schramm U, Schuerer M, Wilkens J, Pawelke J. Development of a Novel Compact Particle Therapy Facility With Laser Driven Ion Beams via Gantry Systems Based on Pulsed Magnets. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Masood U, Bussmann M, Cowan T, Enghardt W, Kaluza M, Herrmannsdoerfer T, Krause M, Pawelke J, Sauerbrey R, Schramm U, Baumann M. Development of Laser-Driven Proton Beam Therapy. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu358.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Affiliation(s)
- T Kluge
- Helmholtzzentrum Dresden-Rossendorf e.V., Bautzner Landstraße 400, 01328 Dresden, Germany
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Jochmann A, Irman A, Bussmann M, Couperus JP, Cowan TE, Debus AD, Kuntzsch M, Ledingham KWD, Lehnert U, Sauerbrey R, Schlenvoigt HP, Seipt D, Stöhlker T, Thorn DB, Trotsenko S, Wagner A, Schramm U. High resolution energy-angle correlation measurement of hard x rays from laser-Thomson backscattering. Phys Rev Lett 2013; 111:114803. [PMID: 24074095 DOI: 10.1103/physrevlett.111.114803] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Indexed: 06/02/2023]
Abstract
Thomson backscattering of intense laser pulses from relativistic electrons not only allows for the generation of bright x-ray pulses but also for the investigation of the complex particle dynamics at the interaction point. For this purpose a complete spectral characterization of a Thomson source powered by a compact linear electron accelerator is performed with unprecedented angular and energy resolution. A rigorous statistical analysis comparing experimental data to 3D simulations enables, e.g., the extraction of the angular distribution of electrons with 1.5% accuracy and, in total, provides predictive capability for the future high brightness hard x-ray source PHOENIX (photon electron collider for narrow bandwidth intense x rays) and potential gamma-ray sources.
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Affiliation(s)
- A Jochmann
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany and Technische Universität Dresden, 01062 Dresden, Germany
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18
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Zeil K, Metzkes J, Kluge T, Bussmann M, Cowan TE, Kraft SD, Sauerbrey R, Schramm U. Direct observation of prompt pre-thermal laser ion sheath acceleration. Nat Commun 2012; 3:874. [PMID: 22673901 PMCID: PMC3621399 DOI: 10.1038/ncomms1883] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 05/02/2012] [Indexed: 11/09/2022] Open
Abstract
High-intensity laser plasma-based ion accelerators provide unsurpassed field gradients in the megavolt-per-micrometer range. They represent promising candidates for next-generation applications such as ion beam cancer therapy in compact facilities. The weak scaling of maximum ion energies with the square-root of the laser intensity, established for large sub-picosecond class laser systems, motivates the search for more efficient acceleration processes. Here we demonstrate that for ultrashort (pulse duration ~30 fs) highly relativistic (intensity ~1021 W cm−2) laser pulses, the intra-pulse phase of the proton acceleration process becomes relevant, yielding maximum energies of around 20 MeV. Prominent non-target-normal emission of energetic protons, reflecting an engineered asymmetry in the field distribution of promptly accelerated electrons, is used to identify this pre-thermal phase of the acceleration. The relevant timescale reveals the underlying physics leading to the near-linear intensity scaling observed for 100 TW class table-top laser systems. High-intensity laser-plasma ion generation is promising as a compact proton source for applications like ion beam therapy. Using a femtosecond table-top laser system, Zeil et al. show that protons efficiently gain energy in the pre-thermal intra-pulse phase of the generation process.
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Affiliation(s)
- K Zeil
- Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
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19
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Kluge T, Cowan T, Debus A, Schramm U, Zeil K, Bussmann M. Electron temperature scaling in laser interaction with solids. Phys Rev Lett 2011; 107:205003. [PMID: 22181740 DOI: 10.1103/physrevlett.107.205003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Indexed: 05/31/2023]
Abstract
A precise knowledge of the temperature and number of hot electrons generated in the interaction of short-pulse high-intensity lasers with solids is crucial for harnessing the energy of a laser pulse in applications such as laser-driven ion acceleration or fast ignition. Nevertheless, present scaling laws tend to overestimate the hot electron temperature when compared to experiment and simulations. We present a novel approach that is based on a weighted average of the kinetic energy of an ensemble of electrons. We find that the scaling of electron energy with laser intensity can be derived from a general Lorentz invariant electron distribution ansatz that does not rely on a specific model of energy absorption. The scaling derived is in perfect agreement with simulation results and clearly follows the trend seen in recent experiments, especially at high laser intensities where other scalings fail to describe the simulations accurately.
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Affiliation(s)
- T Kluge
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Germany.
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20
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Affiliation(s)
- C. Wang
- Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8
| | - S. N. Leung
- Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8
| | - M. Bussmann
- Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8
| | - W. T. Zhai
- Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8
| | - C. B. Park
- Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8
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21
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Fan ESC, Bussmann M, Acosta E. Equilibrium configurations of drops attached to spheres immersed in a uniform laminar flow. CAN J CHEM ENG 2010. [DOI: 10.1002/cjce.20414] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Wang C, Bussmann M, Park CB. Numerical investigation of the effect of screw geometry on the mixing of a viscous polymer melt. J Appl Polym Sci 2010. [DOI: 10.1002/app.31039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kluge T, Enghardt W, Kraft SD, Schramm U, Sentoku Y, Zeil K, Cowan TE, Sauerbrey R, Bussmann M. Efficient laser-ion acceleration from closely stacked ultrathin foils. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:016405. [PMID: 20866745 DOI: 10.1103/physreve.82.016405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 03/23/2010] [Indexed: 05/29/2023]
Abstract
A new scheme to efficiently accelerate protons by a single linear polarized high-intensity ultrashort laser pulse using multiple ultrathin foils is proposed. The foils are stacked at a spacing comparable to their thickness and subsequently irradiated by the same laser pulse. The foil thicknesses are chosen such that the laser light pressure can displace all electrons out of the foil. The authors present a simple, yet precise dynamical model of the acceleration process from which both optimum foil thickness and spacing can be derived. Extensive two-dimensional (2D) particle-in-cell simulations verify the model predictions and suggest an enhancement of the maximum proton kinetic energy by 30% for the two-foil case compared to a single foil.
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Affiliation(s)
- T Kluge
- Forschungszentrum Dresden-Rossendorf eV, Dresden, Germany.
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24
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Debus AD, Bussmann M, Schramm U, Sauerbrey R, Murphy CD, Major Z, Hörlein R, Veisz L, Schmid K, Schreiber J, Witte K, Jamison SP, Gallacher JG, Jaroszynski DA, Kaluza MC, Hidding B, Kiselev S, Heathcote R, Foster PS, Neely D, Divall EJ, Hooker CJ, Smith JM, Ertel K, Langley AJ, Norreys P, Collier JL, Karsch S. Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. Phys Rev Lett 2010; 104:084802. [PMID: 20366938 DOI: 10.1103/physrevlett.104.084802] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Indexed: 05/29/2023]
Abstract
Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.
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Affiliation(s)
- A D Debus
- Forschungzentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328 Dresden, Germany.
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Michaeli W, Hoffmann S, Bussmann M. Developments in the Field of Microstructure Simulation Semi-Crystalline Thermoplastics. Journal of Polymer Engineering 2006. [DOI: 10.1515/polyeng.2006.26.2-4.275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mörschel M, Heintz A, Bussmann M, Junginger T. Follow-up after transanal endoscopic microsurgery or transanal excision of large benign rectal polyps. Langenbecks Arch Surg 1998; 383:320-4. [PMID: 9860223 DOI: 10.1007/s004230050140] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
METHODS Between January 1986 and December 1995, 238 patients with benign rectal polyps underwent either transanal endoscopic microsurgery (n = 226) or transanal excision (n = 12) at the Clinic of General and Abdominal Surgery, Johannes Gutenberg-University, Mainz. RESULTS Mean polyp size was 4.2 cm; 89.1% of polyps measured more than 2 cm in diameter. In 89.1% of cases, histological analysis revealed polyps containing tubulovillous or villous adenomas. Synchronous colonic polyps were detected in 12.5% of patients. Follow-up data are available on 222 patients (94%). At follow-up examination, 169 of the 193 surviving patients (87.6%) were recurrence free. Seven of 193 patients (3.6%) had developed neoplastic colonic polyps and, in 17 patients (8.8%), metachronous polyps were detected. CONCLUSIONS Transanal endoscopic microsurgical polypectomy was furthermore demonstrated to be a low-risk procedure with a low recurrence rate for the complete resection of large rectal polyps. At a follow-up rate of 61.1 %, the incidence of metachronous carcinoma ranged at 3.1%, which is markedly below the rate of 8-18% for tubulovillous or villous adenomas larger than 1 cm in diameter cited in the literature.
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Affiliation(s)
- M Mörschel
- Clinic of General and Abdominal Surgery, Johannes Gutenberg-University, Mainz, Germany
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