Study of Touschek Lifetime in SSRF Storage Ring

JIANG Bo-Cheng; ZHAO Zhen-Tang; LIU Gui-Min

Chinese Physics C> 2006, Vol. 30> Issue(7) : 693-698

Study of Touschek Lifetime in SSRF Storage Ring

Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
Shanghai Synchrotron Radiation Facility (SSRF) is a 3rd generation synchrotron light source which is now under construction. The design emittance of the beam is 3.9nm•rad at the energy of 3.5GeV. Touschek lifetime is the dominant beam lifetime in SSRF for such a small beam emittance. The Touschek lifetime is the function of the energy acceptance of the storage ring. The energy acceptance is not only dependent on the RF voltage, but also restricted by the small physical or dynamic apertures, which makes the calculation complicated. In this paper the energy acceptances along the storage ring are calculated by the 6D tracking method based on the program Accelerator Toolbox (AT). Using those energy acceptance data, we can give a more close evaluation of the Touschek lifetime for different kind of conditions which we are interested in.

References

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. Bernardini C et al. Phys. Rev. Lett., 1963, 10: 4072. Bruck H, Du J L. Proc. 5th Int.Conf. High Energy Accel-erators. Frascati, 1965. 2843. Nadji A et al. Proceedings of PAC97, 1997. 1517-15194. Boge M et al. Proceedings of PAC99, 1999. 2430-24325. Tavares P F et al. Phy. Re. ST-AB, 1998, 1: 0540016. Ohmi K et al. Phys. Rev., 1994, E49: 751

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JIANG Bo-Cheng, ZHAO Zhen-Tang and LIU Gui-Min. Study of Touschek Lifetime in SSRF Storage Ring[J]. Chinese Physics C, 2006, 30(7): 693-698.

JIANG Bo-Cheng, ZHAO Zhen-Tang and LIU Gui-Min. Study of Touschek Lifetime in SSRF Storage Ring[J]. Chinese Physics C, 2006, 30(7): 693-698. shu

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Received: 2006-01-03
Revised: 2006-02-06

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Touschek Lifetime in SSRF Storage Ring

Corresponding author: ZHAO Zhen-Tang,

Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2006-01-03
Accepted Date: 2006-02-06
Available Online: 2006-07-05

Abstract: Shanghai Synchrotron Radiation Facility (SSRF) is a 3rd generation synchrotron light source which is now under construction. The design emittance of the beam is 3.9nm•rad at the energy of 3.5GeV. Touschek lifetime is the dominant beam lifetime in SSRF for such a small beam emittance. The Touschek lifetime is the function of the energy acceptance of the storage ring. The energy acceptance is not only dependent on the RF voltage, but also restricted by the small physical or dynamic apertures, which makes the calculation complicated. In this paper the energy acceptances along the storage ring are calculated by the 6D tracking method based on the program Accelerator Toolbox (AT). Using those energy acceptance data, we can give a more close evaluation of the Touschek lifetime for different kind of conditions which we are interested in.