5-10 May 2019
MedILS
Europe/Berlin timezone

Characterizing high energy bremsstrahlung emission from laser plasma experiments at moderately relativistic intensity

Not scheduled
20m
MedILS

MedILS

Meštrovićevo šetalište 45 HR – 21000 Split Republic of Croatia

Speaker

Dr Sushil Singh (ELI Beamlines, Institute of Physics of the ASCR, )

Description

Abstract

Many applications of laser matter interaction at relativistic intensities, for e.g., ion acceleration, fast ignition, X-ray and neutron radiography, depend crucially on the laser absorption into hot electrons. Measurement of bremsstrahlung spectra generated by these hot electrons inside the target provides information on the electron energy distribution and their transport inside the target.

In this poster, we present results from a recently conducted experimental campaign using the 9 th beam of the SG-II Upgrade laser facility in Shanghai Institute of Optics and Fine Mechanics (SIOM). The p-polarized laser delivered approximately 300 J on target with a pulse duration of about 1 ps and focused intensity of about 7x10 18 W/cm 2 . Tantalum targets of various thickness from 100 um to 3 mm were shot during the experiment. Bremsstrahlung emission was measured using scintillator stack detectors [1] and forward Compton scattering high energy X-ray spectrometer [2]. In situ measurement of reflected laser energy in the specular direction was done using a scattering plate. The measurements characterize laser absorption into hot electrons, and the subsequent generation of high energy X-rays.

References:
[1]. D. R. Rusby et al., Rev. Sci. Inst. 89, 073502 (2018)
[2]. S. Singh et al., Rev. Sci. Inst. 89, 085118 (2018)

Working group Secondary radiation generation & applications

Primary authors

Dr Alejandro Laso Garcia (Institute for Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany) Dr Andreas Wagner (Institute for Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany) Dr Baoqiang Zhu (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Chris Armstrong (Central Laser Facility, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom) Prof. David Neely (Central Laser Facility, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom) Dr Dean Rusby (Central Laser Facility, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom) Dr Deepak Kumar Batheja (ELI Beamlines, Institute of Physics of the ASCR, Dolni Brezany, Czech Republic) Dr Huija Liu (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Jianqiang Zhu (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Lei Ren (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Mingying Sun (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Neng Hua (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Ning Kang (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China) Dr Ondrej Klimo (ELI Beamlines, Institute of Physics of the ASCR, Dolni Brezany, Czech Republic) Prof. Paul McKenna (Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom) Dr Stefan Weber (ELI Beamlines, Institute of Physics of the ASCR, Dolni Brezany, Czech Republic) Dr Sushil Singh (ELI Beamlines, Institute of Physics of the ASCR, ) Prof. Thomas Cowan (Institute for Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany) Prof. Vladimir Tikhonchuk (ELI Beamlines, Institute of Physics of the ASCR, Dolni Brezany, Czech Republic) Dr Yan Zhang (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China)

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