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Experimental Study on the Fast Ion-Beam Instabilities in a Linear Collider

直线对撞机快离子束不稳定性的实验研究

基本信息

批准号：
11695034
负责人：
TAKATA Koji
金额：
$ 3.14万
依托单位：
High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

There are mainly four topics in the joint research with the Pohang Accelerator Laboratory. The first topic is the experimental investigation of the so-called fast ion-beam instability using the linac of the PLS synchrotron radiation facility. The second topic is the joint development of the X-band high-power klystrons for linear collider projects and their high power testing at KEK. The third topic is the study of the high-frequency breakdown of the RF accelerating structures for linear colliders. The new simulation code was developed and the analysis shows that it is possible to make a model, which can explain the experimental observations. From these results, we can now foresee what kinds of RF structures are more robust to the high-frequency breakdown. The last topic is the joint study of linac as the pre-accelerator of the linear colliders using ATF facility of KEK. For the first topic, we have developed and fabricated a fast multi-bunch beam position monitor (BPM) jointly with Pohang Accelerator Laboratory and also developed a beam feed-back system to stabilize the beam motion based on the results of BPM study. These devices were installed at the KEK ATF facility and the testing of their performance showed good results. These results were summarized as a Ph. D. thesis of Vladimir Foguel and he recieved a Ph.D. from this study. Good results have been obtained form the high power testing of the X-band Klystrons for linear colliders and we have succeeded in development of the klsytrons using permanent magnets for the beam-focusing system, first in the world. These good results have been reported as invited talks in several international conferences.

与浦项加速器实验室的联合研究主要有4个课题。第一个课题是利用PLS同步辐射装置的直线加速器对所谓的快离子束不稳定性进行实验研究。第二个主题是为直线对撞机项目联合开发X波段高功率速调管及其在科索沃能源公司的高功率测试。第三个课题是直线对撞机射频加速结构的高频击穿研究。新的模拟程序的开发和分析表明，它是可能的，可以解释实验观察到的模型。从这些结果中，我们现在可以预见什么样的RF结构对高频击穿更鲁棒。最后一个课题是利用KEK的ATF装置进行直线加速器作为直线对撞机的预加速器的联合研究。在第一个课题中，我们与浦项加速器实验室合作开发并制作了一个快速多束团束流位置监测器（BPM），并根据BPM研究的结果开发了一个束流反馈系统来稳定束流运动。这些装置已安装在科索沃能源公司ATF设施，对其性能的测试表明效果良好。这些结果被总结为博士论文。弗拉基米尔·福居尔的论文，他获得了博士学位。从这项研究中。直线对撞机X波段速调管的大功率试验取得了良好的效果，并在世界上首次研制成功了用于束流聚焦系统的永磁速调管。这些良好的成果已作为特邀报告在几个国际会议。