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Seiya, K.

Paper Title Page
MOPA004 Status of Slip Stacking at Fermilab Main Injector 347
 
  • K. Seiya, T. Berenc, B. Chase, J.E. Dey, I. Kourbanis, J.A. MacLachlan, K.G. Meisner, R.J. Pasquinelli, J. Reid, C.H. Rivetta, J. Steimel
    Fermilab, Batavia, Illinois
 
  Funding: Operated by Universities Research Association, Inc. for the U.S. Department of Energy under contract DE-AC02-76CH03000.

In order to increase proton intensity on anti proton production cycle of the Main Injector we are going to use the technique of 'slip stacking' and doing machine studies. In slip stacking, one bunch train is injected at slightly lower energy and second train is at slightly higher energy. Afterwards they are aligned longitudinally and captured with one rf bucket. This longitudinal stacking process is expected to double the bunch intensity. The required intensity for anti proton production is 8·1012 protons in 84 bunches. Beam studies of the slip stacking process have started and we have already established that the stacking procedure works as expected for a low beam intensity. In order to make this stacking process usable for higher intensity beam in standard mode of operation, we are working on high intensity beam and the development of the feedback and feed forward system is under way.

 
TPAP022 Mixed pbar Source Operation at the Fermilab Tevatron 1763
 
  • C.M. Bhat, D. Capista, B. Chase, J.E. Dey, I. Kourbanis, K. Seiya, V. Wu
    Fermilab, Batavia, Illinois
 
  Funding: Work supported by the Universities Research Association, Inc., under contract DE-AC02-76CH03000 with the U.S. Department of Energy.

Recently, we have adopted a scheme called "Mixed pbar Source Operation" to transfer 2.5 MHz pbar bunches from the Recycler and the Accumulator to the Fermilab Main Injector (MI). In this scheme, 2.5MHz pbar bunches are captured adiabatically in 53 MHz buckets at 8 GeV in the MI and accelerated to 150 GeV before bunch coalescing and transfer to the Tevatron collider stores. A special magnet ramp was needed in the MI to allow for pbar beam of slightly different 8 GeV energies from the Recycler and the Accumulator. Here we present the details of the scheme and its advantage over the method used for past several years.