Evaluating a Contribution of the Knock-on Deuterons to the Neutron Yield in the Experiments with Weakly Collisional Plasma Jets (Part 1)

[摘要] Laser-generated interpenetrating plasma jets are widely used in the studies of collisionless interaction of counter-streaming plasmas in conjunction with possible formation of collisionless shocks. In a number of experiments of this type the plasma is formed on plastic targets made of CH or CD. The study of the DD neutron production from the interaction between two CD jets on the one hand and between a CD jet and a CH jet could serve as a qualitative indicator of the collisionless shock formation. The purpose of this memo is a discussion of the effect of collisions on the neutron generation in the interpenetrating CH and CD jets. First, the kinematics of the large-deflection collisions of the deuterons and carbon are discussed. Then the scattering angles are related with the corresponding Rutherford cross-section. After that expression for the number of the backscattered deuterons is provided, and their contribution to the neutron yield is evaluated. The results may be of some significance to the kinetic codes benchmarking and developing the neutron diagnostic.

[发布日期] 2015-12-01

[学科分类] 原子、分子光学和等离子物理

[关键词] LASER-PRODUCED PLASMA;RUTHERFORD SCATTERING;NEUTRONS;COLLISIONLESS PLASMA;DEUTERONS;PLASMA JETS;CARBON 12 TARGET;POLYETHYLENES;DEUTERATION;YIELDS;INTERACTIONS;KNOCK-ON;CROSS SECTIONS;BENCHMARKS;SHOCK WAVES;NUCLEAR REACTION KINETICS;PLASMA DIAGNOSTICS;DEUTERON REACTIONS;BACKSCATTERING;DEUTERIUM TARGET