Investigation of laser ion acceleration inside irradiated solid targets by neutron spectroscopy

Journal Article · Wed Mar 15 00:00:00 EST 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2177230· OSTI ID:20782533

Youssef, A; Kodama, R; Tampo, M ^[1]

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1. Graduate School of Engineering, Osaka University, 2-1 Suita, Osaka 565-0871 (Japan) and Institute of Laser Engineering, Osaka University, 2-6 Suita, Osaka 565-0871 (Japan)

Origins and acceleration directions of accelerated ions inside solid LiF, CH-LiF, and LiF-CH targets irradiated by a 450 fs, 20 J, 1053 nm laser at an intensity of 3x10{sup 18} W/cm{sup 2} have been investigated by neutron spectroscopy. The irradiated targets generate neutrons through the reaction {sup 7}Li (p,n){sup 7}Be between accelerated protons and background {sup 7}Li ions inside the target. The produced neutron spectra observed from two different observation angles 20 deg. and 120 deg. to the target rear-side normal. From the measured and calculated spectra, by three-dimensional Monte Carlo code, the maximum energy, the total number, and the slope temperature of the accelerated ions are investigated. The results indicate that ions are not only accelerated from the front surface toward the rear surface, but also from the rear surface toward the front surface with comparable maximum energy and higher number.

• OSTI ID: 20782533
• Journal Information: Physics of Plasmas, Vol. 13, Issue 3; Other Information: DOI: 10.1063/1.2177230; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
BERYLLIUM 7
ELECTRON TEMPERATURE
ION TEMPERATURE
IONS
IRRADIATION
LASER RADIATION
LIGHT TRANSMISSION
LITHIUM 7
LITHIUM FLUORIDES
MONTE CARLO METHOD
NEUTRON SPECTRA
NEUTRON SPECTROSCOPY
NEUTRONS
PLASMA
PLASMA DIAGNOSTICS
PLASMA GUNS
PLASMA SIMULATION
PROTONS
SOLIDS
SURFACES
THREE-DIMENSIONAL CALCULATIONS