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secondary-beams

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TUPAN016 Rare Isotope Accumulation and Deceleration in the NESR Storage Ring of the FAIR Project electron, ion, injection, antiproton 1425
 
  • M. Steck
  • C. Dimopoulou, A. Dolinskii, F. Nolden
    GSI, Darmstadt
  The storage ring NESR of the FAIR project can be operated with rare isotope beams which are produced by projectile fragmentation of a fast heavy ion beam. After stochastic pre-cooling at 740 MeV/u in a dedicated collector ring (CR) the rare isotopes will be accumulated in the NESR by a longitudinal accumulation technique in combination with electron cooling. Various schemes for the accumulation have been considered and evaluated. For experiments with stored beams and for transfer to an ion trap the ion beams can be decelerated to a minimum energy of 4 MeV/u. The deceleration mode of the NESR will also be available for deceleration of antiprotons to a minimum energy of 30 MeV. Fast extraction to a trap and slow extraction to fixed target are foreseen.  
 
TUPAN095 Design and Performance of the CNGS Secondary Beam Line target, proton, extraction, simulation 1601
 
  • E. Gschwendtner
  • L. Bruno, K. Elsener, A. Ferrari, M. Meddahi, A. Pardons, S. Rangod
    CERN, Geneva
  • A. Guglielmi
    INFN/LNL, Legnaro, Padova
  • P. R. Sala
    INFN-Milano, Milano
  An intense muon-neutrino beam (1017 nu-mu/day) is generated at CERN and directed towards the Gran Sasso National Laboratory, LNGS, in Italy, 732 km away from CERN. The muon-neutrinos are produced in association with muons in the decay of the pions and kaons created in the target. In the presently approved physics programme, it is foreseen to run the CNGS facility with 4.5 · 1019 protons/year for five years. During a CNGS cycle, i.e. every 6s, two nominal SPS extractions of 2.4 ·1013 protons each at 400GeV/c are sent down the proton beam line to the target. The CNGS secondary beam line, starting with the target, has to cope with this situation, which pushes the beam line equipment and instrumentation to the limits of radiation hardness, mechanical stresses, etc. during the CNGS operation. An overview of the CNGS secondary beam line will be shown. Emphasis will be on the target, the magnetic focusing lenses (horn and reflector) and the muon monitors. The performance of the secondary beam line during beam commissioning and physics operation will be discussed and measurements compared with simulations.  
 
THPAS039 Status Report on the NSCL RF Fragment Separator kicker, collimation, cyclotron, ion 3585
 
  • M. Doleans
  • V. Andreev, B. Arend, D. Bazin, A. Becerril Reyes, R. Fontus, P. Glennon, D. Gorelov, P. F. Mantica, J. Ottarson, H. Schatz, B. Sherrill, J. Stoker, O. Tarasov, J. Vincent, J. Wagner, X. Wu, A. Zeller
    NSCL, East Lansing, Michigan
  The RF Fragment Separator (RFFS) proposed in* is now under construction and should be operational by May 2007. The RFFS is an additional purification system for secondary beams at the National Superconducting Cyclotron Laboratory after the existing A1900 fragment separator and will primarily be used to purify beams of rare neutron deficient isotopes. The RFFS uses a transverse electric field of an rf kicker to separate unwanted particles from the desired ion beam, a pi/2 phase advance cell to rotate the beam in phase space before the beam reaches a collimating aperture for purification and a final pi phase advance cell to transport the desired beam to the experiment. The final design for the rf kicker and the focusing system is presented and a status report on the building and commissioning effort is given.

* D. Gorelov, V. Andreev, D. Bazin, M. Doleans, T. Grimm, F. Marti, J. Vincent and X. Wu, "RF-Kicker System for Secondary Beams at NSCL/MSU" PAC2005, Knoxville, Tennessee, 16th-20th, May 2005