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Reimold M, Assenbaum S, Bernert C, Beyreuther E, Brack FE, Karsch L, Kraft SD, Kroll F, Loeser M, Nossula A, Pawelke J, Püschel T, Schlenvoigt HP, Schramm U, Umlandt MEP, Zeil K, Ziegler T, Metzkes-Ng J. Time-of-flight spectroscopy for laser-driven proton beam monitoring. Sci Rep 2022; 12:21488. [PMID: 36509788 PMCID: PMC9744900 DOI: 10.1038/s41598-022-25120-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/24/2022] [Indexed: 12/15/2022] Open
Abstract
Application experiments with laser plasma-based accelerators (LPA) for protons have to cope with the inherent fluctuations of the proton source. This creates a demand for non-destructive and online spectral characterization of the proton pulses, which are for application experiments mostly spectrally filtered and transported by a beamline. Here, we present a scintillator-based time-of-flight (ToF) beam monitoring system (BMS) for the recording of single-pulse proton energy spectra. The setup's capabilities are showcased by characterizing the spectral stability for the transport of LPA protons for two beamline application cases. For the two beamline settings monitored, data of 122 and 144 proton pulses collected over multiple days were evaluated, respectively. A relative energy uncertainty of 5.5% (1[Formula: see text]) is reached for the ToF BMS, allowing for a Monte-Carlo based prediction of depth dose distributions, also used for the calibration of the device. Finally, online spectral monitoring combined with the prediction of the corresponding depth dose distribution in the irradiated samples is demonstrated to enhance applicability of plasma sources in dose-critical scenarios.
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Affiliation(s)
- Marvin Reimold
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany.
- Technische Universität Dresden, 01062, Dresden, Germany.
| | - Stefan Assenbaum
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - Constantin Bernert
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - Elke Beyreuther
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- OncoRay - National Center for Radiation Research in Oncology, 01309, Dresden, Germany
| | - Florian-Emanuel Brack
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - Leonhard Karsch
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- OncoRay - National Center for Radiation Research in Oncology, 01309, Dresden, Germany
| | - Stephan D Kraft
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
| | - Florian Kroll
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
| | - Markus Loeser
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
| | - Alexej Nossula
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Martin-Luther-Universität Halle-Wittenberg, 06120, Halle, Germany
| | - Jörg Pawelke
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- OncoRay - National Center for Radiation Research in Oncology, 01309, Dresden, Germany
| | - Thomas Püschel
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
| | | | - Ulrich Schramm
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - Marvin E P Umlandt
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
| | - Karl Zeil
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
| | - Tim Ziegler
- Helmholtz-Zentrum Dresden, Rossendorf, 01328, Dresden, Germany
- Technische Universität Dresden, 01062, Dresden, Germany
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Schmitz B, Metternich M, Boine-Frankenheim O. Automated reconstruction of the initial distribution of laser accelerated ion beams from radiochromic film (RCF) stacks. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:093306. [PMID: 36182524 DOI: 10.1063/5.0094105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Radiochromic film (RCF) stacks are the most commonly used diagnostic of laser accelerated ion beams at Gesellschaft für Schwerionenforschung, Darmstadt (GSI) and at other laboratories. So far, the evaluation of the stacks is performed using manual input for the deposited energy determination. This is usually a tedious task and introduces uncertainty in the resulting ion energy spectrum and also in the corresponding angular distribution. An automated procedure is especially important if larger data sets, containing multiple laser shots, are investigated. Here, we describe an automated procedure for the evaluation of digitized RCF stacks. RCF stacks obtained at GSI's PHELIX laser system are evaluated as a test case. A validation of parts of the procedure is performed on generated input data.
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Affiliation(s)
- Benedikt Schmitz
- Technische Universität Darmstadt, Institut für Teilchenbeschleunigung und Elektromagnetische Felder (TEMF), Schlossgartenstr. 8, 64289 Darmstadt, Germany
| | - Martin Metternich
- Technische Universität Darmstadt, Institut für Kernphysik (IKP), Schlossgartenstr. 9, 64289 Darmstadt, Germany
| | - Oliver Boine-Frankenheim
- Technische Universität Darmstadt, Institut für Teilchenbeschleunigung und Elektromagnetische Felder (TEMF), Schlossgartenstr. 8, 64289 Darmstadt, Germany
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Laso Garcia A, Hannasch A, Molodtsova M, Ferrari A, Couperus Cadabağ JP, Downer MC, Irman A, Kraft SD, Metzkes-Ng J, Naumann L, Prencipe I, Schramm U, Zeil K, Zgadzaj R, Ziegler T, Cowan TE. Calorimeter with Bayesian unfolding of spectra of high-flux broadband x rays. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:043102. [PMID: 35489906 DOI: 10.1063/5.0078443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
We report the development of a multipurpose differential x-ray calorimeter with a broad energy bandwidth. The absorber architecture is combined with a Bayesian unfolding algorithm to unfold high energy x-ray spectra generated in high-intensity laser-matter interactions. Particularly, we show how to extract absolute energy spectra and how our unfolding algorithm can reconstruct features not included in the initial guess. The performance of the calorimeter is evaluated via Monte Carlo generated data. The method accuracy to reconstruct electron temperatures from bremsstrahlung is shown to be 5% for electron temperatures from 1 to 50 MeV. We study bremsstrahlung generated in solid target interaction showing an electron temperature of 0.56 ± 0.04 MeV for a 700 μm Ti titanium target and 0.53 ± 0.03 MeV for a 50 μm target. We investigate bremsstrahlung from a target irradiated by laser-wakefield accelerated electrons showing an endpoint energy of 551 ± 5 MeV, inverse Compton generated x rays with a peak energy of 1.1 MeV, and calibrated radioactive sources. The total energy range covered by all these sources ranges from 10 keV to 551 MeV.
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Affiliation(s)
- A Laso Garcia
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - A Hannasch
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - M Molodtsova
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - A Ferrari
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - J P Couperus Cadabağ
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - M C Downer
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - A Irman
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - S D Kraft
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - J Metzkes-Ng
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - L Naumann
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - I Prencipe
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - U Schramm
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - K Zeil
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - R Zgadzaj
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - T Ziegler
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - T E Cowan
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
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