主环中受激的纵向发射度增长

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology Pub Date : 1989-03-20 DOI:10.1109/PAC.1989.73282

G. Jackson, T. Ieiri

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引用次数: 1

摘要

作者描述了在即将到来的固定目标运行中，预期更高的强度要求(2-3*10/sup 10/质子/束)，因此升级主环束扩散器的努力。在固定目标操作中，光束强度受到主环和Tevatron的相干不稳定性的限制。不稳定性的增长率通常与质子束长度成反比。由于固定目标操作对光束的纵向发射度不敏感，因此使用束展布器来增加发射度，从而增加束长。发射度增长是通过向射频相位或幅度控制电压注入噪声来刺激的。报道了各种增产方案的效率测试结果。本文还设计了一种用于测量束扩展器效果的10khz带宽束长监视器。试验表明，在可容忍的束损下，束长增长50%是可能的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Stimulated longitudinal emittance growth in the Main Ring

The authors describe efforts to upgrade the Main Ring bunch spreaders in anticipation of even greater intensity requirements (2-3*10/sup 10/ protons/bunch) in the coming fixed target run. During fixed target operations beam intensity is limited by coherent instabilities in both the Main Ring and Tevatron. The growth rates for instabilities are generally inversely proportional to the proton bunch length. Since fixed target operations are insensitive to the longitudinal emittance of the beams, bunch spreaders are employed to increase the emittance, and hence the bunch length. Emittance growth is stimulated by injecting noise onto either the RF phase or amplitude control voltages. Test results of the efficiency of various stimulation schemes are reported. The design of a 10-kHz bandwidth bunch length monitor, used to measure the effect of the bunch spreader, is also presented. Tests show that 50% bunch length growths are possible with tolerable beam loss.<>

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来源期刊

Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology

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