Time filter

Source Type

Tang C.,University of Sichuan | Wang C.,Teaching and Research Section of Physics | Wang Y.,Teaching and Research Section of Physics | Wang G.,Chengdu Medical College | And 2 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2012

For studying the yield and spatial distributions of protons produced in the interaction of femtosecond laser with plasmas, protons behavior at the normal direction of the rear surface of the target irradiated by ultra-intensity pulse laser irradiated solid targets was explored on SILEX-I laser facility. The yield and spatial distributions of the protons with different target thicknesses were recorded by radiochromic film (RCF) HD810. The results show that the optics density (OD) is closely correlated with the protons flux, OD values increase with the increasing of proton beam flux; For fixed thickness of C8H8 layer, the proton beam flux and yield of protons and OD of RCF decrease with the increasing Cu layer thickness; for the same thickness of targets, the OD and yield of protons decrease with the decreases of laser intensity; And the corresponding spatial profile of proton beam shows ring-, filament-, and disc-like distribution. The size of the distribution is independent of laser focus.


Wang C.-J.,Teaching and Research Section of Physics | Tang C.-M.,University of Sichuan | Wang G.-C.,Chengdu Medical College | Wang Y.-P.,Teaching and Research Section of Physics | And 2 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2013

To study the generation and the acceleration mechanisms of high energy ions in the interaction of ultra-short ultra-intense laser with solid targets, high energy ions behavior at the normal direction of the rear surface of the target produced from ulintencity pulse laser irradiated Cu thin film solid targets is explored on SILEX-I laser facility. The solid nuclear detector CR39 and Thomson spectrum are used to detect the energy spectra of protons and carbon ions, and the protons and C4+, C3+, C2+, C1+ ions are osderved. The results show that the ions are emitted from the normal direction of target-back and the ions have a certain cut-off energy; the protons and C4+, C3+, C2+, C1+ ions cut-off energy values are separately 1 221 keV, 1 941 keV, 1 899 keV, 624 keV, and 422 keV; the carbon ions beam current is increased with carbon ions charge number; the yield of proton is far higher than carbon ions. High-energy ion generation and acceleration are the result of a variety of mechanisms where the electrostatic field TNSA acceleration mechanism is dominant.


Wang C.-J.,Teaching and Research Section of Physics | Tang C.-M.,Sichuan Institute of Science and Engineering Physics | Wang G.-C.,Chengdu Medical College | Wang Y.-P.,Teaching and Research Section of Physics | And 2 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2013

To study the distribution characteristics of high energy ions in the interaction with femtosecond pulse laser with solid targets, high energy ions behavior at the normal direction of the rear surface of the target produced from ulintencity pulse laser irradiated Cu thin film solid targets is explored on SILEX-I laser facility. The solid nuclear detector CR39 and Thomson spectrum are used to detect the energy spectra of protons and carbon ions. Protons H+ and carbon ions C1+, C2+, C3+ and C4+ have been observed. In addition, the results show that the ions are cut-off at a certain energy, and the ratio of the maximum cut-off energy of the C1+, C2+, C3+ and C4+ ions is about 1:2:3:4.Moreover, the carbon ions traces are much weaker than the protons trace, so the yields of protons can be much higher than carbon ions, and the protons have the screening effect on the carbon ions. And the cut-off energy of the carbon ion is increased with the charge-to-mass ratio in the same shot. The results will provide the reference for inertial confinement fusion (ICF) "quick ignition" feasibility analysis.


Zhang C.-J.,Teaching and Research Section of Physics
Chinese Physics C | Year: 2010

The g1(1|1) supersymmetric vertex model with domain wall boundary conditions (DWBC) on an N x N square lattice is considered. We obtain the reduction formulae for the two-point boundary correlation functions of the model. © 2010 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

Loading Teaching and Research Section of Physics collaborators
Loading Teaching and Research Section of Physics collaborators