Beams Document 496-v1

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Booster tune shift study due to space charge effects, using resonance scans.

Document #:
Beams-doc-496-v1
Document type:
Note
Submitted by:
Panagiotis Spentzouris
Updated by:
Panagiotis Spentzouris
Document Created:
11 Mar 2003, 16:34
Contents Revised:
11 Mar 2003, 16:34
Metadata Revised:
11 Mar 2003, 16:34
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Abstract:
This is a summary of measurements of beam transmission vs beam intensity vs quad current in the Booster. The location and width of traversed resonances (dip in transmission) is extracted and plotted vs beam intensity. Space charge
effects should change the location of the dip. Since these effects depress the beam tune, a higher quad strength should be required to drive the same resonance (see FNAL EXP-67, September 1974, for a similar measurement done with the Main Ring). A preliminary analysis indicates a tune shift Deleta_nu_x on the order of 0.04 between 1 and 9 turns of injected beam in the Booster.
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