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Liu, W.T.

Paper Title Page
WEPEA059 Energy Acceptance and Touschek Lifetime Calculations for the TPS Storage Ring 2621
 
  • H.-J. Tsai, H.-P. Chang, M.-S. Chiu, P.J. Chou, C.-C. Kuo, W.T. Liu, G.-H. Luo, F.H. Tseng, C.H. Yang
    NSRRC, Hsinchu
  
 

Tou­schek scat­ter­ing is an im­por­tant beam life­time lim­it­ing ef­fect for the TPS stor­age ring due to sev­er­al chal­lenges such as low emit­tance, small phys­i­cal aper­ture and large sec­ond-or­der mo­men­tum com­paction fac­tor (non­lin­ear lon­gi­tu­di­nal mo­tion). The Tou­schek rel­e­vant en­er­gy ac­cep­tance is de­ter­mined by these chal­lenges, there­fore a re­li­able es­ti­mate of the Tou­schek life­time is es­sen­tial. We ob­tained Tou­schek in­duced be­ta­tron os­cil­la­tion am­pli­tudes in three sec­tions (LS, SS and ARC) and RF buck­et ac­cep­tance an­a­lyt­i­cal­ly and with sim­u­la­tions. In this paper, we pre­sent the en­er­gy ac­cep­tance and Tou­schek life­time cal­cu­la­tions for the TPS stor­age ring in the cases for dif­fer­ent chro­matic­i­ty set­tings, ID cham­ber lim­i­ta­tions, mag­net mul­ti­pole field er­rors and op­tics cor­rec­tion ef­fects.