Chopper Operation for the Tandem Scrapers at the J-PARC Linac
Chopper Operation for the Tandem Scrapers at the J-PARC Linac
复制标题
J-PARC 直线加速器的串联铲运机的斩波操作
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S.Michizono
中科院分区：
文献类型：
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作者：
K.Futatsukawa;Z. Fang;Y. Fukui;T.Kobayashi;S.Michizono
在J-PARC直线加速器中，通过安装环形耦合结构（ACS）腔，2013年成功实现了能量升级到400 MeV。在下一阶段，我们计划在今年夏天通过改进前端来进行当前的升级。然后，由RF偏转器照射被踢射束的刮刀的热负荷增加，并且其表面被预测为损坏。因此，我们正在准备串联铲运机以抑制热负荷。被踢的梁的一半通向刮刀，剩余部分通向另一半。其斩波操作将通过低电平RF（LLRF）系统在周期性循环中旋转RF偏转器的相位来实现。我们正在为相位旋转和MPS单元准备设备。这将于2015年10月对该系统进行调查，并于2015年4月从50 mA的用户操作开始使用。
In the J-PARC linac, the energy upgrade to 400 MeV by the installation of Annular-ring Coupled Structure (ACS) cavities was successfully achieved in 2013. In the next stage, we schedule the current upgrade by improving the front-end in this summer. Then, the heat load of a scraper to irradiate the kicked beam by the RF deflector increases and its surface is predicted to be damaged. Therefore, we are preparing the tandem scrapers to suppress the heat load. The half of the kicked beam leads to a scraper and the residual is to the other. Its chopping operation will be achieved by rotating the phase of the RF deflector in the periodic cycles by the low-level RF (LLRF) system. We are preparing the device for the phase rotation and the MPS unit. This will be investigated this system on October and utilized from the user operation of 50 mA on April, 2015.