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Bremsstrahlung emission from high power laser interactions with constrained targets for industrial radiography

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Abstract

Laser–solid interactions are highly suited as a potential source of high energy X-rays for nondestructive imaging. A?bright, energetic X-ray pulse can be driven from a small source, making it ideal for high resolution X-ray radiography. By limiting the lateral dimensions of the target we are able to confine the region over which X-rays are produced, enabling imaging with enhanced resolution and contrast. Using constrained targets we demonstrate experimentally a $(20\pm 3)~\unicode[STIX]{x03BC}\text{m}$ X-ray source, improving the image quality compared to unconstrained foil targets. Modelling demonstrates that a larger sheath field envelope around the perimeter of the constrained targets increases the proportion of electron current that recirculates through the target, driving a brighter source of X-rays.

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DOI:10.1017/hpl.2019.8

所属栏目:Special Issue for HPLSE 2018

基金项目:This work was supported by EPSRC grants EP/K022415/1 and EP/R006202/1, and the STFC IPS grant ST/P000177/1. The authors also acknowledge the use of the EPOCH PIC code (developed under EPSRC grant EP/G054940/1) and the computing resources provided by STFC Scientific Computing Department’s SCARF cluster. Data associated with research published in this paper is accessible at: http://dx.doi.org/10.15129/2e22b3b3-738c-4ca1-b72d-ea11ef7beb5f.

收稿日期:2018-09-05

录用日期:2019-01-30

网络出版日期:2019-06-26

作者单位    点击查看

C. D. Armstrong:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UKCentral Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
C. M. Brenner:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
C. Jones:Interface Analysis Centre, HH Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL, UK
D. R. Rusby:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
Z. E. Davidson:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
Y. Zhang:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UKBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
J. Wragg:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
S. Richards:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
C. Spindloe:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
P. Oliveira:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
M. Notley:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
R. Clarke:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK
S. R. Mirfayzi:Centre for Plasma Physics, Queen’s University Belfast, Belfast BT7 1NN, UK
S. Kar:Centre for Plasma Physics, Queen’s University Belfast, Belfast BT7 1NN, UK
Y. Li:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
T. Scott:Interface Analysis Centre, HH Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL, UK
P. McKenna:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
D. Neely:Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, UK

联系人作者:C. D. Armstrong(chris.armstrong@stfc.ac.uk)

备注:This work was supported by EPSRC grants EP/K022415/1 and EP/R006202/1, and the STFC IPS grant ST/P000177/1. The authors also acknowledge the use of the EPOCH PIC code (developed under EPSRC grant EP/G054940/1) and the computing resources provided by STFC Scientific Computing Department’s SCARF cluster. Data associated with research published in this paper is accessible at: http://dx.doi.org/10.15129/2e22b3b3-738c-4ca1-b72d-ea11ef7beb5f.

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引用该论文

C. D. Armstrong, C. M. Brenner, C. Jones, D. R. Rusby, Z. E. Davidson, Y. Zhang, J. Wragg, S. Richards, C. Spindloe, P. Oliveira, M. Notley, R. Clarke, S. R. Mirfayzi, S. Kar, Y. Li, T. Scott, P. McKenna, and D. Neely, "Bremsstrahlung emission from high power laser interactions with constrained targets for industrial radiography," High Power Laser Science and Engineering 7(2), e24 (2019)

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