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首页> 外文会议>14th International Conference on High-Power Particle Beams Jun 23-28, 2002 Albuquerque, New Mexico >Plasma Channel Transport for Heavy Ion Fusion: Investigation of Beam Transport, Channel Initiation and Stability
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Plasma Channel Transport for Heavy Ion Fusion: Investigation of Beam Transport, Channel Initiation and Stability

机译：用于重离子聚变的等离子通道传输：束传输，通道起始和稳定性的研究

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摘要

For final beam transport in an IFE reactor three alternatives are mainly discussed. These are neutralized ballistic transport, self-pinched transport, and plasma channel transport. Discharge plasma channels were investigated in the recent years at GSI Darmstadt and at LBNL Berkeley in a number of experiments. Different initiation mechanisms for gas discharges of up to 60 kA were studied and compared. In the Berkeley experiments laser ionization of organic vapors in a buffer gas was used to initiate and direct the discharge while at GSI laser gas heating and ion beam induced gas ionization were tested as initiation mechanisms. Measurements of temperature, electron density, gas density, and magnetic field distribution in the channels are compared with results of beam transport experiments at the GSI UNILAC accelerator and with MHD simulations of the 1D-fluidcode CYCLOPS, which was developed in Berkeley. Good agreement between plasma diagnostics results, measured ion optical properties and MHD simulations was found. Parameters that are required for a reactor application are a discharge current of 50 kA, a channel diameter below 1 cm, a pointing stability better than 500 μm, and MHD stability for more than 10 μs. These parameters have been demonstrated in the recent experiments. The results imply that transport channels work with sufficient stability, reproducibility and ion optical properties in a wide pressure range and for various discharge gases.
机译：对于IFE反应堆中的最终束传输，主要讨论了三种选择。这些是中和的弹道运输，自挤压运输和等离子通道运输。近年来，在GSI Darmstadt和LBNL Berkeley进行了许多实验，研究了放电等离子体通道。研究和比较了高达60 kA的气体放电的不同引发机制。在伯克利实验中，缓冲气体中有机蒸气的激光电离被用来引发和引导放电，而在GSI中，激光加热和离子束诱导的气体电离被作为引发机理进行了测试。将通道中温度，电子密度，气体密度和磁场分布的测量结果与GSI UNILAC加速器上的束传输实验结果以及伯克利开发的一维流体代码CYCLOPS的MHD模拟进行了比较。在等离子体诊断结果，测得的离子光学性质和MHD模拟之间找到了很好的一致性。反应堆应用所需的参数为50 kA的放电电流，小于1 cm的通道直径，优于500μm的指向稳定性以及超过10μs的MHD稳定性。这些参数已在最近的实验中得到证明。结果表明，在较宽的压力范围内以及对于各种放电气体，输送通道都具有足够的稳定性，可重复性和离子光学性能。

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