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FLAT BUNCH CREATION AND ACCELERATION: A POSSIBLE PATH FOR THE LHC LUMINOSITY UPGRADE

Document #:
LARP-doc-995-v1
Document type:
Proceeding
Submitted by:
Chandrashekhara Bhat
Updated by:
Chandrashekhara Bhat
Document Created:
05 Oct 2009, 17:06
Contents Revised:
05 Oct 2009, 17:06
DB Info Revised:
05 Oct 2009, 17:06
Viewable by:
  • Public document
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Abstract:
Increasing the collider luminosity by replacing bunches having Gaussian line-charge distribution with flat bunches, but with same beam-beam tune shift at collision, has been studied widely in recent years. But, creation of “stable” flat bunches (and their acceleration) using a multiple harmonic RF system has not been fully explored. Here, we review our experience with long flat bunches in the barrier RF buckets at Fermilab. Present some preliminary results from beam dynamics simulations and recent beam studies in the LHC injectors to create stable flat bunches using double harmonic RF systems. The results deduced from these studies will be used to model the necessary scheme for luminosity upgrade in the LHC. We have also described a viable (and economical) way for creation and acceleration of flat bunches in the LHC. The flat bunch scheme may have many advantages over the LHC baseline scenario, particularly because of the reduced momentum spread of the bunch for increased intensities.
Files in Document:
  • pdf (FERMILAB-CONF-09-243-AD-APC-CARE-HHH-2008-Flat-bunches.pdf, 933.7 kB)
Publication Information:
Final CARE-HHH Workshop on Scenario for the LHC Upgrade and FAIR, HHH-2008,CERN YELLOW BOOK - CERN-2009-004 (2009) page 106-114
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