用于AWAKE等离子体源的铷蒸气源
A Rubidium Vapor Source for a Plasma Source for AWAKE
摘要：
本文介绍了在AWAKE等离子体尾场加速实验中用作等离子体源的铷蒸气源的方案。等离子体尾流场加速过程要求等离子体具有许多严格的参数：电子密度在（1-10）$\times$ 10 $^{14}$ cm $^{-3}$范围内可调，0.25%的相对密度均匀性，在每一端的陡峭（$<$ 10 cm）密度斜坡，密度梯度在10 m内可从-3到+10%调节，以及在等离子体柱开始附近的%水平密度阶跃。我们表明，分析和直接模拟Monte Carlo结果，建议源中的铷密度应满足这些要求。然后激光电离将上述中性蒸气参数转移到等离子体。
英文摘要：
We present the scheme for a rubidium vapor source that is used as a plasma source in the AWAKE plasma wakefield acceleration experiment. The plasma wakefield acceleration process requires a number of stringent parameters for the plasma: electron density adjustable in the (1-10)$\times$10$^{14}$cm$^{-3}$ range, 0.25% relative density uniformity, sharp ($<$10cm) density ramps at each end, density gradient adjustable from -3 to +10% over 10m, and %-level density step near the beginning the plasma column. We show with analytical and direct Simulation Monte Carlo results that the rubidium density in the proposed source should meet these requirements. Laser ionization then transfers the above neutral vapor parameters to the plasma.
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