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Zeraouli G, Mariscal DA, Hollinger R, Anaraki SZ, Folsom EN, Grace E, Rusby D, Hill MP, Williams GJ, Scott GG, Sullivan B, Wang S, King J, Swanson KK, Simpson RA, Djordjevic BZ, Andrews S, Costa R, Cauble B, Albert F, Rocca JJ, Ma T. Flexible tape-drive target system for secondary high-intensity laser-driven sources. Rev Sci Instrum 2023; 94:123306. [PMID: 38117203 DOI: 10.1063/5.0180715] [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: 10/11/2023] [Accepted: 11/22/2023] [Indexed: 12/21/2023]
Abstract
We present the development of a flexible tape-drive target system to generate and control secondary high-intensity laser-plasma sources. Its adjustable design permits the generation of relativistic MeV particles and x rays at high-intensity (i.e., ≥1 × 1018 W cm-2) laser facilities, at high repetition rates (>1 Hz). The compact and robust structure shows good mechanical stability and a high target placement accuracy (<4 μm RMS). Its compact and flexible design allows for mounting in both the horizontal and vertical planes, which makes it practical for use in cluttered laser-plasma experimental setups. The design permits ∼170° of access on the laser-driver side and 120° of diagnostic access at the rear. A range of adapted apertures have been designed and tested to be easily implemented to the targetry system. The design and performance testing of the tape-drive system in the context of two experiments performed at the COMET laser facility at the Lawrence Livermore National Laboratory and at the Advanced Lasers and Extreme Photonics (ALEPH) facility at Colorado State University are discussed. Experimental data showing that the designed prototype is also able to both generate and focus high-intensity laser-driven protons at high repetition rates are also presented.
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Affiliation(s)
- G Zeraouli
- Colorado State University, Fort Collins, Colorado 80523, USA
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D A Mariscal
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Hollinger
- Colorado State University, Fort Collins, Colorado 80523, USA
| | | | - E N Folsom
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E Grace
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Rusby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M P Hill
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G J Williams
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G G Scott
- Colorado State University, Fort Collins, Colorado 80523, USA
- STFC Central Laser Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 OQX, United Kingdom
| | - B Sullivan
- Colorado State University, Fort Collins, Colorado 80523, USA
- XUV Lasers, Fort Collins, Colorado 80523, USA
| | - S Wang
- Colorado State University, Fort Collins, Colorado 80523, USA
| | - J King
- Colorado State University, Fort Collins, Colorado 80523, USA
| | - K K Swanson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R A Simpson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Z Djordjevic
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Andrews
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Costa
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Cauble
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Albert
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J J Rocca
- Colorado State University, Fort Collins, Colorado 80523, USA
- XUV Lasers, Fort Collins, Colorado 80523, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Stoupin S, MacPhee AG, Kozioziemski B, MacDonald MJ, Ose N, Heinmiller JM, Izumi N, Rusby D, Springer PT, Schneider MB. X-ray continuum spectroscopy of inertial confinement fusion implosions at the National Ignition Facility. Rev Sci Instrum 2023; 94:113504. [PMID: 37955555 DOI: 10.1063/5.0171244] [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: 08/08/2023] [Accepted: 10/17/2023] [Indexed: 11/14/2023]
Abstract
A methodology for measuring x-ray continuum spectra of inertial confinement fusion (ICF) implosions is described. The method relies on the use of ConSpec, a high-throughput spectrometer using a highly annealed pyrolytic graphite crystal [MacDonald et al., J. Instrum. 14, P12009 (2019)], which measures the spectra in the ≃20-30 keV range. Due to its conical shape, the crystal is sagittally focusing a Bragg-reflected x-ray spectrum into a line, which enhances the recorded x-ray emission signal above the high neutron-induced background accompanying ICF implosions at the National Ignition Facility. To improve the overall measurement accuracy, the sensitivity of the spectrometer measured in an off-line x-ray laboratory setting was revised. The error analysis was expanded to include the accuracy of the off-line measurements, the effect of the neutron-induced background, as well as the influence of possible errors in alignment of the instrument to the ICF target. We demonstrate how the improved methodology is applied in the analysis of ConSpec data with examples of a relatively low-neutron-yield implosion using a tritium-hydrogen-deuterium mix as a fuel and a high-yield deuterium-tritium (DT) implosion producing high level of the background. In both cases, the shape of the measured spectrum agrees with the exponentially decaying spectral shape of bremsstrahlung emission to within ±10%. In the case of the high-yield DT experiment, non-monotonic deviations slightly exceeding the measurement uncertainties are observed and discussed.
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Affiliation(s)
- S Stoupin
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A G MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Kozioziemski
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J MacDonald
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Ose
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J M Heinmiller
- Nevada National Security Site, Livermore Operations, Livermore, California 94550, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Rusby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P T Springer
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Hohenberger M, Kerr S, Yeamans C, Rusby D, Meaney KD, Hahn K, Heredia R, Sarginson T, Blue B, Mackinnon AJ, Hsing WW. A combined MeV-neutron and x-ray source for the National Ignition Facility. Rev Sci Instrum 2022; 93:103510. [PMID: 36319336 DOI: 10.1063/5.0101816] [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: 06/03/2022] [Accepted: 08/11/2022] [Indexed: 06/16/2023]
Abstract
In support of future radiation-effects testing, a combined environment source has been developed for the National Ignition Facility (NIF), utilizing both NIF's long-pulse beams, and the Advanced Radiographic Capability (ARC) short pulse lasers. First, ARC was used to illuminate a gold foil at high-intensity, generating a significant x-ray signal >1 MeV. This was followed by NIF 10 ns later to implode an exploding pusher target filled with fusionable gas for neutron generation. The neutron and x-ray bursts were incident onto a retrievable, close-standoff diagnostic snout. With separate control over both neutron and x-ray emission, the platform allows for tailored photon and neutron fluences and timing on a recoverable test sample. The platform exceeded its initial fluence goals, demonstrating a neutron fluence of 2.3 ×1013 n/cm2 and an x-ray dose of 7 krad.
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Affiliation(s)
- M Hohenberger
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Kerr
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Yeamans
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Rusby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K D Meaney
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - K Hahn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Heredia
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Sarginson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Blue
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A J Mackinnon
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W W Hsing
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Stoupin S, MacPhee AG, Ose N, MacDonald MJ, Masse L, Rusby D, Schneider MB. A Monte Carlo technique to model performance of streak camera-based time-resolving x-ray spectrometers. Rev Sci Instrum 2022; 93:093510. [PMID: 36182490 DOI: 10.1063/5.0101705] [Citation(s) in RCA: 1] [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: 06/02/2022] [Accepted: 07/27/2022] [Indexed: 06/16/2023]
Abstract
A Monte Carlo technique has been developed to simulate the expected signal and the statistical noise of x-ray spectrometers that use streak cameras to achieve the time resolution required for ultrafast diagnostics of laser-generated plasmas. The technique accounts for statistics from both the photons incident on the streak camera's photocathode and the electrons emitted by the photocathode travelling through the camera's electron optics to the sensor. We use the technique to optimize the design of a spectrometer, which deduces the temporal history of electron temperature of the hotspot in an inertial confinement fusion implosion from its hard x-ray continuum emission spectra. The technique is general enough to be applied to any instrument using an x-ray streak camera.
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Affiliation(s)
- S Stoupin
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A G MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Ose
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J MacDonald
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Masse
- PCEA-DAM, DIF, F-91297 Arpajon, France
| | - D Rusby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M B Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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5
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Green JS, Booth N, Dance RJ, Gray RJ, MacLellan DA, Marshall A, McKenna P, Murphy CD, Ridgers CP, Robinson APL, Rusby D, Scott RHH, Wilson L. Time-resolved measurements of fast electron recirculation for relativistically intense femtosecond scale laser-plasma interactions. Sci Rep 2018. [PMID: 29540743 PMCID: PMC5852165 DOI: 10.1038/s41598-018-22422-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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] [Indexed: 11/20/2022] Open
Abstract
A key issue in realising the development of a number of applications of high-intensity lasers is the dynamics of the fast electrons produced and how to diagnose them. We report on measurements of fast electron transport in aluminium targets in the ultra-intense, short-pulse (<50 fs) regime using a high resolution temporally and spatially resolved optical probe. The measurements show a rapidly (≈0.5c) expanding region of Ohmic heating at the rear of the target, driven by lateral transport of the fast electron population inside the target. Simulations demonstrate that a broad angular distribution of fast electrons on the order of 60° is required, in conjunction with extensive recirculation of the electron population, in order to drive such lateral transport. These results provide fundamental new insight into fast electron dynamics driven by ultra-short laser pulses, which is an important regime for the development of laser-based radiation and particle sources.
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Affiliation(s)
- J S Green
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK.
| | - N Booth
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK
| | - R J Dance
- York Plasma Institute, Department of Physics, University of York, York, YO10 5DD, UK
| | - R J Gray
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 0NG, UK
| | - D A MacLellan
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 0NG, UK
| | - A Marshall
- York Plasma Institute, Department of Physics, University of York, York, YO10 5DD, UK
| | - P McKenna
- Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 0NG, UK
| | - C D Murphy
- York Plasma Institute, Department of Physics, University of York, York, YO10 5DD, UK
| | - C P Ridgers
- York Plasma Institute, Department of Physics, University of York, York, YO10 5DD, UK
| | - A P L Robinson
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK
| | - D Rusby
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK.,Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 0NG, UK
| | - R H H Scott
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK
| | - L Wilson
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK
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Deas RM, Wilson LA, Rusby D, Alejo A, Allott R, Black PP, Black SE, Borghesi M, Brenner CM, Bryant J, Clarke RJ, Collier JC, Edwards B, Foster P, Greenhalgh J, Hernandez-Gomez C, Kar S, Lockley D, Moss RM, Najmudin Z, Pattathil R, Symes D, Whittle MD, Wood JC, McKenna P, Neely D. A laser driven pulsed X-ray backscatter technique for enhanced penetrative imaging. J Xray Sci Technol 2015; 23:791-797. [PMID: 26756414 DOI: 10.3233/xst-150520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
X-ray backscatter imaging can be used for a wide range of imaging applications, in particular for industrial inspection and portal security. Currently, the application of this imaging technique to the detection of landmines is limited due to the surrounding sand or soil strongly attenuating the 10s to 100s of keV X-rays required for backscatter imaging. Here, we introduce a new approach involving a 140 MeV short-pulse (< 100 fs) electron beam generated by laser wakefield acceleration to probe the sample, which produces Bremsstrahlung X-rays within the sample enabling greater depths to be imaged. A variety of detector and scintillator configurations are examined, with the best time response seen from an absorptive coated BaF2 scintillator with a bandpass filter to remove the slow scintillation emission components. An X-ray backscatter image of an array of different density and atomic number items is demonstrated. The use of a compact laser wakefield accelerator to generate the electron source, combined with the rapid development of more compact, efficient and higher repetition rate high power laser systems will make this system feasible for applications in the field. Content includes material subject to Dstl (c) Crown copyright (2014). Licensed under the terms of the Open Government Licence except where otherwise stated. To view this licence, visit http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3 or write to the Information Policy Team, The National Archives, Kew, London TW9 4DU, or email: psi@ nationalarchives.gsi.gov.uk.
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Affiliation(s)
- R M Deas
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
| | - L A Wilson
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - D Rusby
- SUPA Department of Physics, University of Strathclyde, Glasgow, UK
| | - A Alejo
- Department of Physics and Astronomy, Queens University of Belfast, Belfast, UK
| | - R Allott
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - P P Black
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
| | - S E Black
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
| | - M Borghesi
- Department of Physics and Astronomy, Queens University of Belfast, Belfast, UK
| | - C M Brenner
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - J Bryant
- Blackett Laboratory, Imperial College London, London, UK
| | - R J Clarke
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - J C Collier
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - B Edwards
- Innovations, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - P Foster
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - J Greenhalgh
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - C Hernandez-Gomez
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - S Kar
- Department of Physics and Astronomy, Queens University of Belfast, Belfast, UK
| | - D Lockley
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
| | - R M Moss
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK
| | - Z Najmudin
- Blackett Laboratory, Imperial College London, London, UK
| | - R Pattathil
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - D Symes
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
| | - M D Whittle
- Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK
| | - J C Wood
- Blackett Laboratory, Imperial College London, London, UK
| | - P McKenna
- SUPA Department of Physics, University of Strathclyde, Glasgow, UK
| | - D Neely
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, UK
- SUPA Department of Physics, University of Strathclyde, Glasgow, UK
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Rusby D. Home health agency operations. The management of business. II. NLN Publ 1970:33-6. [PMID: 5209796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Rusby D. Centralized homemaker-home health aide services. Nurs Outlook 1969; 17:50-3. [PMID: 5193836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Grover ME, Rusby D. Realignment of Public Health Nursing Services. Am J Public Health Nations Health 1946; 36:746-750. [PMID: 18016381 PMCID: PMC1625838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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