Angular distribution and dose measurements of hard x-ray emission from intense laser-plasma interaction

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2781383· OSTI ID:21062087

Rao, B S; Naik, P A; Arora, V; Khan, R A; Gupta, P D ^[1]

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1. Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, M.P. (India)

An experimental study on hard x-ray Bremsstrahlung radiation due to fast electron generation from a planar solid copper target irradiated by 150 mJ, 45 fs Ti:sapphire laser pulses at I{approx}10{sup 18} W/cm{sup 2} is reported. Angular distribution of the hard x-ray dose rate (h{nu}{>=}40 keV) is observed to be strongly forward peaked in the direction of target normal with a measured peak value of 40 {mu}Sv/h, at a distance of 500 mm from the target. Two sources of this radiation, one at the laser irradiated target and the other at the chamber wall facing the target, are inferred from the measurements of angular distribution and distance dependence of the x-ray dose rate.

• OSTI ID: 21062087
• Journal Information: Journal of Applied Physics, Vol. 102, Issue 6; Other Information: DOI: 10.1063/1.2781383; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPES AND RADIATION SOURCES
ANGULAR DISTRIBUTION
BREMSSTRAHLUNG
COPPER
DOSE RATES
ELECTRONS
HARD X RADIATION
IRRADIATION
KEV RANGE 10-100
LASER-PRODUCED PLASMA
LASERS
PHOTON EMISSION
PLASMA PRODUCTION
SAPPHIRE
X-RAY SOURCES