NEW OPTICS WITH EMITTANCE REDUCTION AT THE SPRING-8 STORAGE RING
NEW OPTICS WITH EMITTANCE REDUCTION AT THE SPRING-8 STORAGE RING
复制标题
SPRING-8 存储环上具有降低发射度的新型光学器件
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Takao
中科院分区：
文献类型：
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作者：
Y. Shimosaki;K. Fukami;K.K.Kaneki;K. Kobayashi;M. Masaki;C.Mitsuda;T.Nakamura;T. Nakanishi;H. Ohkuma;M. Oishi;M. Shoji;K. Soutome;S. Takano;M. Takao
在SPring-8储存环上对一种新光学器件的机器调谐进行了研究。自然发射度从过去的3.49 nmrad值降低到2.41 nmrad，而没有任何磁体位置的变化。在诊断光束线处观察到比3.49 nmrad光学器件高1.3倍的通量密度。通过校正光学函数的误差，通过调整注入磁体的强度和通过优化六极磁场，已经实现了80%量级的标称注入效率（3.49 nmrad光学器件：92%）。在1 mA /束团下，束流寿命为13小时（3.49 nmrad光学器件：22小时），根据Touschek寿命测量估计的动量孔径为2.3%（3.49 nmrad光学器件：2.8%）。在验证光束线处的光子束性能时，这种新的光学器件已应用于用户操作。
The machine tuning of a new optics has been examined at the SPring-8 storage ring. The natural emittance is reduced to 2.41 nmrad from the past value of 3.49 nmrad without any change of magnet positions. The flux density 1.3 times higher than that of the 3.49 nmrad optics was observed at the diagnostics beamline. The nominal injection efficiency of the order of 80 % has been achieved (the 3.49 nmrad optics: 92 %) by correcting the error of the optics function, by adjusting the strength of the injection magnets and by optimizing the sextupole magnetic fields. The beam lifetime was 13 h at 1 mA / bunch (the 3.49 nmrad optics: 22 h), and the momentum aperture estimated from the measurement of the Touschek lifetime was 2.3 % (the 3.49 nmrad optics: 2.8 %). As verifying the photon beam performance at beamlines, this new optics has been applied to the user operation.