Quantum and collisional effects on the unstable spectrum of a relativistic electron beam–plasma system are investigated through a two-fluids model. Application is made to the near target center interaction of the relativistic electron beam in the fast ignition scenario. Partial degeneracy effects are found to be negligible while the most influential factors are the beam temperature and the electron–ion collision frequency of the plasma. The introduction of the latter triggers some oblique unstable modes of much larger wavelength than the collisionless ones. Transition from the collisionless regime to the resistive one is thus documented and found discontinuous.
量子效应和碰撞效应对相对论电子束-等离子体系统不稳定谱的影响，通过双流体模型进行了研究。将该模型应用于快点火方案中相对论电子束在靶心附近的相互作用。研究发现，部分简并效应可忽略不计，而最具影响力的因素是电子束温度以及等离子体的电子-离子碰撞频率。引入后者会触发一些斜向不稳定模，其波长远大于无碰撞情形下的模。由此，从无碰撞 regime 到电阻 regime 的转变被记录下来，并发现该转变是不连续的。