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EMP control and characterization on high-power laser systems

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Abstract

Giant electromagnetic pulses (EMP) generated during the interaction of high-power lasers with solid targets can seriously degrade electrical measurements and equipment. EMP emission is caused by the acceleration of hot electrons inside the target, which produce radiation across a wide band from DC to terahertz frequencies. Improved understanding and control of EMP is vital as we enter a new era of high repetition rate, high intensity lasers (e.g. the Extreme Light Infrastructure). We present recent data from the VULCAN laser facility that demonstrates how EMP can be readily and effectively reduced. Characterization of the EMP was achieved using B-dot and D-dot probes that took measurements for a range of different target and laser parameters. We demonstrate that target stalk geometry, material composition, geodesic path length and foil surface area can all play a significant role in the reduction of EMP. A combination of electromagnetic wave and 3D particle-in-cell simulations is used to inform our conclusions about the effects of stalk geometry on EMP, providing an opportunity for comparison with existing charge separation models.

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DOI:10.1017/hpl.2018.21

基金项目:The authors would like to thank the staff of the Central Laser Facility, whose support and expertise were invaluable in the production of this paper. They also gratefully acknowledge funding from EPSRC grants EP/L01663X/1 and EP/L000644/1, the Newton UK grant, the National Natural Science Foundation of China NSFC/11520101003, and the LLNL Academic Partnership in ICF.

收稿日期:2017-11-21

录用日期:2018-03-06

网络出版日期:2018-03-19

作者单位    点击查看

P. Bradford:Department of Physics, York Plasma Institute, University of York, Heslington, York YO10 5DD, UK
N. C. Woolsey:Department of Physics, York Plasma Institute, University of York, Heslington, York YO10 5DD, UK
G. G. Scott:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
G. Liao:Key Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
H. Liu:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Y. Zhang:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
B. Zhu:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
C. Armstrong:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
S. Astbury:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
C. Brenner:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
P. Brummitt:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
F. Consoli:ENEA - C.R. Frascati - Dipartimento FSN, Via E. Fermi 45, 00044 Frascati, Italy
I. East:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
R. Gray:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
D. Haddock:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
P. Huggard:Space Science Department, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
P. J. R. Jones:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
E. Montgomery:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
I. Musgrave:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
P. Oliveira:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
D. R. Rusby:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
C. Spindloe:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
B. Summers:Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
E. Zemaityte:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
Z. Zhang:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Y. Li:Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
P. McKenna:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UK
D. Neely:Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, UKCentral Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK

联系人作者:P. Bradford(philip.bradford@york.ac.uk)

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引用该论文

P. Bradford, N. C. Woolsey, G. G. Scott, G. Liao, H. Liu, Y. Zhang, B. Zhu, C. Armstrong, S. Astbury, C. Brenner, P. Brummitt, F. Consoli, I. East, R. Gray, D. Haddock, P. Huggard, P. J. R. Jones, E. Montgomery, I. Musgrave, P. Oliveira, D. R. Rusby, C. Spindloe, B. Summers, E. Zemaityte, Z. Zhang, Y. Li, P. McKenna, and D. Neely, "EMP control and characterization on high-power laser systems," High Power Laser Science and Engineering 6(2), e21 (2018)

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