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Bogacz, S. A.

Paper Title Page
MOP003 A Shared Superconducting Linac for Protons and Muons 34
 
  • M. Popovic, C. M. Ankenbrandt
    Fermilab, Batavia, Illinois
  • S. A. Bogacz
    Jefferson Lab, Newport News, Virginia
  • R. P. Johnson
    Muons, Inc, Batavia
  
  A future Fermilab proton driver* based on TESLA superconducting linac modules can provide protons to produce the muons and also accelerate the muons to be used for a neutrino factory or muon collider. Recent advances in muon cooling** imply muon emittances that are compatible with the 1300 MHz accelerating structures that are the basis for the ILC design. In the example discussed here, H- ions are accelerated to 8 GeV in the superconducting linac, then stripped, stored and bunched in a ring while the linac cavities are rephased for muon acceleration. Then the protons are extracted from the ring to produce pions and muons which are cooled in about six hundred meters, accelerated to a few GeV and injected into the linac at the point for acceleration to add 7 GeV. By recirculating the muons in the constant frequency section of such a proton driver linac, even higher energies can be achieved quickly so that losses from muon decay are minimized. By adding additional refrigeration and RF power, the repetition rate of the linac can be increased to make large increases in the average flux of a neutrino factory and the average luminosity of a muon collider.

*G. W. Foster and J. A. MacLachlan, Proceedings of LINAC 2002, Gyeongju, Korea
**R. P. Johnson et al., Pressurized Hydrogen-filled Linacs for Muon Cooling, this conference.

 
TU2001 The 12-GeV CEBAF Upgrade Project 218
 
  • A. Freyberger, J. F. Benesch, S. A. Bogacz, Y.-C. Chao, J. M. Grames, L. Harwood, R. Kazimi, G. A. Krafft, L. Merminga, E. Pozdeyev, Y. Roblin, M. Spata, M. Wiseman, B. C. Yunn, Y. Zhang
    Jefferson Lab, Newport News, Virginia
  
  The status of the CEBAF recirculating linac upgrade from 6 GeV to 12 GeV is presented. This upgrade consists of an increase in machine energy by a factor of two and the addition of a new experimental hall [including new extraction region and transport line]. The doubling of the energy will be achieved by three means: added new high-gradient 7-cell cryomodules, refurbishment of existing cryomodules, and adding an extra pass through the linac. Beam requirements, beam physics issues including synchrotron radiation effects, and the expected beam properties will be presented. The talk will also present the beam optics for the 12 GeV upgrade including optimization of multipass transport in the linacs.