New injection scheme using a pulsed quadrupole magnet in electron storage rings
New injection scheme using a pulsed quadrupole magnet in electron storage rings
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DOI：
10.1103/physrevstab.10.123501
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发表时间：
2007-12
影响因子：
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通讯作者：
K. Harada;Yukinori Kobayashi;T. Miyajima;S. Nagahashi
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文献类型：
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作者：
K. Harada;Yukinori Kobayashi;T. Miyajima;S. Nagahashi
我们在高能加速器研究组织 (KEK) 的光子工厂高级环 (PF-AR) 中演示了一种使用单脉冲四极磁体 (PQM) 的新注入方案，该方案没有脉冲局部凸点。该方案采用了四极磁体的基本特性，即中心的磁场为零，其他地方的磁场为零。 PQM有效降低了注入光束的相干电子感应加速器振荡幅度；然后，注入的光束被捕获到环中，而不会很大程度上影响已经存储的光束。为了使用实际光束研究该方案的性能，我们构建了 PQM，提供超过 3 T=m 的更高场梯度和 2:4 s 的更短脉冲宽度，这是 PF-AR 旋转周期的两倍。现场测量确认 PQM 规格后，我们将其安装到环中。然后，我们使用真实束流进行了实验，最终成功在 PF-AR 中存储了超过 60 mA 的束流。这是在电子存储环中使用单个 PQM 的首次成功的束注入。
We demonstrated a new injection scheme using a single pulsed quadrupole magnet (PQM) with no pulsed local bump at the Photon Factory Advanced Ring (PF-AR) in High Energy Accelerator Research Organization (KEK). The scheme employs the basic property of a quadrupole magnet, that the field at the center is zero, and nonzero elsewhere. The amplitude of coherent betatron oscillation of the injected beam is effectively reduced by the PQM; then, the injected beam is captured into the ring without largely affecting the already stored beam. In order to investigate the performance of the scheme with a real beam, we built the PQM providing a higher field gradient over 3 T=m and a shorter pulse width of 2:4 s, which is twice the revolution period of the PF-AR. After the field measurements confirmed the PQM specifications, we installed it into the ring. Then, we conducted the experiment using a real beam and consequently succeeded in storing the beam current of more than 60 mA at the PF-AR. This is the first successful beam injection using a single PQM in electron storage rings.