Damage test for International Linear Collider positron generation target at KEKB
Damage test for International Linear Collider positron generation target at KEKB
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KEKB 国际直线对撞机正电子发生靶损伤测试
DOI：
10.1103/physrevstab.9.071001
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Kamitani
中科院分区：
文献类型：
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作者：
M. Kuriki;T. Mimashi;K. Saito;M. Kikuchi;T. Kamitani
ILC（国际直线对撞机）的目标是在1 TeV的质心能量下进行电子-正电子碰撞。一个聚束串将包含多达2800个3.2 nC聚束，具有308 ns聚束间距或5600个1.6 nC聚束，具有154 ns间距。聚束列车的长度将是0.9毫秒。因为这个非常大量的束在火车中，严重损害的正电子生产目标驱动的6 GeV入射电子束的关注。作为ILC正电子源，已经提出了几种不同的方法。目标硬度是有关选择的关键点。本文报道了利用高能环（KEKB HER）中的储存电子束对靶的硬度进行测试的实验。IPPAK（ILC Positron Project At KEKB）通过操纵中止触发器，可以再现类似于ILC正电子产生靶的条件。实验于2005年6月29日和30日进行。在最重条件下（KEKB模式），目标受到严重损伤，而在ILC模式下，目标受到的损伤较小，甚至没有损伤。对ILC正电子产生方案可能产生的影响也进行了讨论。
ILC (International Linear Collider) is aiming to conduct electron-positron collisions at 1 TeV center-ofmass energy. One bunch train will contain up to 2800 3.2 nC bunches with a 308 ns bunch spacing or 5600 1.6 nC bunches with a 154 ns spacing. The bunch-train length will be 0.9 ms. Because of this extremely large amount of beam in a train, serious damage to a positron production target driven by 6 GeV incident electron beam is of concern. As the ILC positron source, several different methods have been proposed. The target hardness is a key point concerning the selection. In this article, we report on a test experiment to examine the target hardness by using a stored electron beam in KEKB HER (High Energy Ring). The project name is IPPAK (ILC Positron Project At KEKB). By manipulating the abort kicker, a condition similar to that of the ILC positron production target can be reproduced. The experiment was carried out on June 29 and 30, 2005. The target was seriously damaged under the heaviest condition (KEKB mode), but the damage was less and nothing for those of the ILC mode. Possible impacts to the ILC positron production scheme are also discussed.