Author: Derbenev, Y.S.
Paper Title Page
MOPAB240 Estimates of Damped Equilibrium Energy Spread and Emittance in a Dual Energy Storage Ring 774
 
  • B. Dhital, G.A. Krafft
    ODU, Norfolk, Virginia, USA
  • Y.S. Derbenev, D. Douglas, A. Hutton, G.A. Krafft, F. Lin, V.S. Morozov, Y. Zhang
    JLab, Newport News, Virginia, USA
  
  Funding: Work supported by the U.S. Department of Energy, Office of Science, and Office of Nuclear Physics under Contracts DE-AC05-06OR23177 and DE-AC02-06CH11357. / Jefferson Lab EIC Fellowship2020.
A dual en­ergy stor­age ring de­sign con­sists of two loops at markedly dif­fer­ent en­er­gies. As in a sin­gle-en­ergy stor­age ring, the lin­ear op­tics in the ring de­sign may be used to de­ter­mine the damped equi­lib­rium emit­tance and en­ergy spread. Be­cause the in­di­vid­ual ra­di­a­tion events in the two rings are dif­fer­ent and in­de­pen­dent, we can pro­vide an­a­lyt­i­cal es­ti­mates of the damp­ing times in a dual en­ergy stor­age ring. Using the damp­ing times, the val­ues of damped en­ergy spread, and emit­tance can be de­ter­mined for a range of pa­ra­me­ters re­lated to lat­tice de­sign and rings en­er­gies. We pre­sent an­a­lyt­i­cal cal­cu­la­tions along with sim­u­la­tion re­sults to es­ti­mate the val­ues of damped en­ergy spread and emit­tance in a dual en­ergy stor­age ring. We note that the damp­ing time tends to be dom­i­nated by the damp­ing time of the high en­ergy ring in cases where the en­ergy of the high en­ergy rings is sig­nif­i­cantly greater than that of the low en­ergy ring. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB240  
About • paper received ※ 17 May 2021       paper accepted ※ 27 May 2021       issue date ※ 13 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUXA07 Beam Dynamics Study in a Dual Energy Storage Ring for Ion Beam Cooling* 1290
 
  • B. Dhital, G.A. Krafft
    ODU, Norfolk, Virginia, USA
  • Y.S. Derbenev, D. Douglas, A. Hutton, G.A. Krafft, F. Lin, V.S. Morozov, Y. Zhang
    JLab, Newport News, Virginia, USA
  
  Funding: * Work supported by the U.S. Department of Energy, Office of Science, and Office of Nuclear Physics under Contracts DE-AC05-06OR23177 and DE-AC02-06CH11357. / Jefferson Lab EIC Fellowship2020.
A dual en­ergy stor­age ring de­signed for beam cool­ing con­sists of two closed rings with sig­nif­i­cantly dif­fer­ent en­er­gies: the cool­ing and damp­ing rings. These two rings are con­nected by an en­ergy re­cov­er­ing su­per­con­duct­ing RF struc­ture that pro­vides the nec­es­sary en­ergy dif­fer­ence. In our de­sign, the RF ac­cel­er­a­tion has a main linac and har­monic cav­i­ties both run­ning at crest that at first ac­cel­er­ates the beam from low en­ergy EL to high en­ergy EH and then de­cel­er­ates the beam from EH to EL in the next pass. The pur­pose of the har­monic cav­i­ties is to ex­tend the bunch length in a dual en­ergy stor­age ring as such a longer bunch length may be very use­ful in a cool­ing ap­pli­ca­tion. Be­sides these cav­i­ties, a bunch­ing cav­ity run­ning on zero-cross­ing phase is used out­side of the com­mon beam­line to pro­vide the nec­es­sary lon­gi­tu­di­nal fo­cus­ing for the sys­tem. In this paper, we pre­sent a pre­lim­i­nary lat­tice de­sign along with the fun­da­men­tal beam dy­nam­ics study in such a dual en­ergy stor­age ring. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUXA07  
About • paper received ※ 19 May 2021       paper accepted ※ 07 June 2021       issue date ※ 28 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)