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Pyka, N.

Paper Title Page
MOPD003 Engineering Status of SIS100 672
 
  • P.J. Spiller, U. Blell, L.H.J. Bozyk, H. Eickhoff, E.S. Fischer, E. Floch, F. Hagenbuck, M. Kauschke, A. Krämer, J.P. Meier, C. Mühle, N. Pyka, S. Ratschow, H. Reich-Sprenger, P. Schnitzer, J. Stadlmann, St. Wilfert
    GSI, Darmstadt
  
 

The en­gi­neer­ing de­sign, in­clud­ing the spec­i­fi­ca­tions for the ac­cel­er­a­tor com­po­nents of the FAIR syn­chrotron SIS100 has been sum­ma­rized in the Tech­ni­cal De­sign Re­port. The final stage of tech­ni­cal plan­ning shall ap­proach pro­duc­tion readi­ness for the major tech­ni­cal sys­tems in 2010. Sig­nif­i­cant progress has been achieved in the de­sign of the cry­o­mag­net­ic sys­tem with its main dipole and quadrupole mod­ules, en­abling the pro­duc­tion of the first pre-se­ries dipole mag­net. Slight mod­i­fi­ca­tions of the lat­tice have been im­ple­ment­ed to equal­ize most of the cryo­stat in­ter­con­nec­tions, lead­ing to a sim­pli­fied de­sign and in­stal­la­tion ef­fort, and a re­duced va­ri­ety of com­po­nents and spar parts. The new par­al­lel tun­nel al­lows op­ti­mal short in­ter­con­nec­tions be­tween the sup­ply units and power con­vert­ers and the ac­cel­er­a­tor com­po­nents. The sta­tus of the en­gi­neer­ing de­sign of SIS100 will be re­port­ed.

  
THPEB004 Slow Extraction from the Superconducting Synchrotron SIS300 at FAIR: Lattice Optimization and Compensation of Field Errors 3882
 
  • A. Saa Hernandez, H. Mueller, N. Pyka, P.J. Spiller
    GSI, Darmstadt
  • U. Ratzinger
    IAP, Frankfurt am Main
  
 

With the abil­i­ty to ac­cel­er­ate heavy ions up to an en­er­gy of 32 GeV/u, the SIS300 su­per­con­duct­ing (sc) syn­chrotron is a cen­tral part of the new FAIR fa­cil­i­ty at GSI-Darm­stadt. SIS300 will pro­vide beams with a 20-fold in­crease in en­er­gy and, by means of a stretch­er mode or a fast ramped mode (1 T/s), 100-10000 times high­er av­er­age in­ten­si­ty. The beam from SIS300 will be ex­tract­ed to­wards the ex­per­i­ments using res­o­nant slow ex­trac­tion, thus SIS300 be­comes the first su­per­con­duct­ing syn­chrotron world­wide with this fea­ture. Cou­pling and per­sis­tent cur­rents are the main prac­ti­cal lim­i­ta­tion for op­er­a­tion of sc mag­nets at high ramp­ing rates and long slow ex­trac­tion plateaus. The ef­fect of the per­sis­tent cur­rents, which are time de­pen­dent and de­pend as well on the mag­net's his­to­ry, is es­pe­cial­ly crit­i­cal for slow ex­trac­tion at low en­er­gies. These ef­fects de­ter­mine the tol­er­ances on mag­net­ic com­po­nents. In order to ad­dress this issue, de­tailed sim­u­la­tions of beam dy­nam­ics at slow ex­trac­tion have been per­formed. In par­tic­u­lar, the op­ti­miza­tion of the lat­tice and its op­ti­cal pa­ram­e­ters for a low-loss ex­trac­tion in the pres­ence of steady and time-de­pen­dent field com­po­nents will be pre­sent­ed.