Title :
IPROP simulations of the GAMBLE II proton transport experiment
Author_Institution :
Mission Res. Corp., Albuquerque, NM, USA
Abstract :
We have simulated the proton transport of the 6-kA, 1-MV GAMBLE II experiment using a modified version of the IPROP particle-in-cell code. IPROP now uses a hybrid model in which plasma electrons are divided into high-energy macro particle and thermal-fluid components. This model includes “knock-on” bound-electron collision and runaway sources for high-energy electrons. Using IPROP, we have calculated net currents in reasonable agreement with the experiment ranging from 5-11% of the total current in pressures from 0.25-4 torr helium. In the simulations, the pinch current sample by the 1.5-cm beam was 2-3 times larger than the net current at 4-cm radius. The attenuation of net current at larger radii was the result of a highly-conductive energetic component of plasma electrons surrounding the beam. Having benchmarked IPROP against experiment, we have examined higher-current ion beams with respect to possible transport for inertial confinement fusion. We present some preliminary findings
Keywords :
digital simulation; nuclear engineering computing; plasma collision processes; plasma inertial confinement; plasma simulation; plasma-beam interactions; GAMBLE II; IPROP; currents; high current ion beams; inertial confinement fusion; net current; particle-in-cell code; pinch current; plasma electrons; proton transport; Attenuation; Electron beams; Helium; Ion beams; Particle beams; Plasma confinement; Plasma simulation; Plasma sources; Plasma transport processes; Protons;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309714