Author: Mustapha, B.
Paper Title Page
TUO3AB02
 Improved Beam Characteristics from the ATLAS Upgrade  
 
  • C. Dickerson, B. Mustapha, P.N. Ostroumov, R.C. Pardo, G.P. Zinkann
    ANL, Argonne, USA
  
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
The Ar­gonne Tan­dem Lin­ear Ac­cel­er­a­tor Sys­tem (ATLAS) re­cently com­pleted a sig­nif­i­cant up­grade and re­con­fig­u­ra­tion. Along with the major ad­di­tions of a new CW room tem­per­a­ture RFQ and a new cryo­stat of quar­ter wave res­onators op­ti­mized for = 0.077, the trans­verse and lon­gi­tu­di­nal op­tics were re­con­fig­ured to op­ti­mize the per­for­mance of these new com­po­nents. Beam com­mis­sion­ing in­ves­ti­ga­tions showed an im­prove­ment of 15% – 20% in trans­mis­sion ef­fi­cien­cies and an in­crease of up to 50% in max­i­mum beam in­ten­si­ties. The de­tails of the up­graded fa­cil­ity and the com­mis­sion­ing re­sults will be pre­sented. 		 
slides icon Slides TUO3AB02 [2.661 MB]  
 
THO1AB01 Simultaneous Acceleration of Radioactive and Stable Beams in the ATLAS Linac 334
 
  • B. Mustapha, P.N. Ostroumov
    ANL, Argonne, USA
  • M.A. Fraser
    CERN, Geneva, Switzerland
  • A. Perry
    Illinois Institute of Technology, Chicago, Illlinois, USA
  
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
ATLAS is now the only US DOE Na­tional User Fa­cil­ity for low-en­ergy heavy-ion sta­ble beams. With the re­cent com­mis­sion­ing of the Cal­i­fornium Rare Iso­tope Breeder Up­grade (CARIBU), ATLAS is now also used to ac­cel­er­ate ra­dioac­tive beams. The de­mand for both sta­ble and ra­dioac­tive beam time is al­ready ex­ceed­ing two to three times the 5500 hours de­liv­ered by ATLAS every year. The time struc­ture of the EBIS charge breeder to be in­stalled next year for CARIBU beams is such that only 3% of the ATLAS duty cycle will be used for ra­dioac­tive beams. Being a CW ma­chine, 97% of the ATLAS cycle will be avail­able for the in­jec­tion and ac­cel­er­a­tion of sta­ble beams with­out re­tun­ing. This si­mul­ta­ne­ous ac­cel­er­a­tion is pos­si­ble for sta­ble and ra­dioac­tive beams with charge-to-mass ra­tios within 3%. We have de­vel­oped a strate­gic plan to up­grade ATLAS for this pur­pose over the next few years, where two to three beams could be de­liv­ered si­mul­ta­ne­ously to dif­fer­ent ex­per­i­men­tal areas. The up­grade con­cept will be pre­sented and dis­cussed along with the re­cent stud­ies and de­vel­op­ments done in this di­rec­tion. 		 
slides icon Slides THO1AB01 [1.829 MB]