Effect of a prepulse on the efficiency of gamma-ray generation by a relativistic laser pulse obliquely incident on a planar target

Journal Article · Sat Apr 01 00:00:00 EDT 2017 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QEL16312· OSTI ID:22724685

Serebryakov, D. A.; Nerush, E. N.

This paper examines the effect of a density gradient produced in a target by a prepulse on the efficiency of synchrotron gamma-ray generation by a laser pulse with an intensity of the order of 10{sup 22} to 10{sup 23} W cm{sup −2} obliquely incident on a planar target. We demonstrate that the gamma-ray and hard X-ray generation efficiency and the fraction of absorbed laser pulse energy can exceed those in the case of a uniform target with a sharp boundary by a factor of 1.3 – 2, depending on the angle of incidence. At a moderately large preplasma size, the optimal angle of incidence is 30°. At a sufficiently large size, normal incidence is optimal. (paper)

• OSTI ID: 22724685
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 47, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DENSITY
GAMMA RADIATION
HARD X RADIATION
INCIDENCE ANGLE
LASER TARGETS
LASERS
PULSES
RELATIVISTIC RANGE
SYNCHROTRON RADIATION