Title :
Beam lifetime estimation for taiwan 3gev synchrotron light source
Author :
Liu, W.T. ; Chang, H.P. ; Chao, H.C. ; Chou, P.J. ; Kuo, C.C. ; Luo, G.H. ; Tsai, H.J. ; Wang, M.H.
Author_Institution :
Nat. Synchrotron Radiat. Res. Center, Hsinchu
Abstract :
The demanding design features of Taiwan Photon Source (TPS), low emittance and small gap undulator vacuum vessels, cause Touschek scattering and gas scattering to play a major limitation role for beam lifetime. We calculate the Touschek lifetime based on the tracking procedure determining energy acceptance. The nonlinear synchrotron oscillation due to large second- order momentum compaction factor is included in the energy acceptance calculations. Small vertical ID gaps are imposed in the tracking procedure. Besides, the gas scattering lifetime is estimated with varying gas pressure. The possible improvement solutions for lifetime will be addressed.
Keywords :
accelerator RF systems; accelerator cavities; electron accelerators; particle beam bunching; storage rings; synchrotrons; RF cavities; TPS; Taiwan Photon Source; Touschek scattering; beam lifetime estimation; bunch length; electron storage ring; electron volt energy 3 GeV; energy acceptance; gas scattering; second-order momentum compaction factor; synchrotron light source; undulator vacuum vessels; vertical ID gaps; Compaction; Lattices; Life estimation; Lifetime estimation; Light scattering; Light sources; Orbital calculations; Particle scattering; Radio frequency; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440993
