Emittance measurement at KEK-ATF damping ring
Emittance measurement at KEK-ATF damping ring
复制标题
KEK-ATF 阻尼环的发射率测量
DOI：
10.1109/pac.1999.794400
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Kashiwagi
中科院分区：
文献类型：
--
作者：
H. Hayano;K. Kubo;T. Mitsuhashi;T. Naito;N. Terunuma;N. Toge;J. Urakawa;T. Okugi;S. Kashiwagi
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In order to achieve an extremely low emittance down to /spl epsiv//sub y//spl sim/1/spl times/10/sup -11/ m-rad, the beam development has been continued at KEK-ATF for future linear collider. The emittance measurement in the damping ring is a key point to confirm the low emittance beam. The beam size measurement is done by SR interferometer using visible light (/spl sim/500 nm) at ATF damping ring. The measured beam sizes were already reached less than 14 /spl mu/m (vertical) acid 37 /spl mu/m (horizontal), respectively. The beta function was also measured by applying a perturbation on the quadrupole magnet. The dispersion function was measured by means of RF frequency modulation method. Combining these measured values, the emittance was measured as /spl epsiv//sub x/=1.8/spl times/10/sup -9/ m-rad, /spl epsiv//sub y/=6.1/spl times/10/sup -11/ m-rad. The measurement technologies are described.