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Title: Mitigation of Emittance Dilution Due to Transverse Mode Coupling in the L-Band Linacs of the ILC

Mitigation of Emittance Dilution Due to Transverse Mode Coupling in the L-Band Linacs of the ILC The main L-band linacs of the ILC accelerate 2820 bunches from a center of mass of 10 GeV to 500 GeV (and in the proposed later upgrade, to 1 TeV). The emittance of the vertical plane is approximately 400 times less than that of the horizontal plane. Provided the vertical and horizontal mode dipole frequencies are degenerate then the motion in each plane is not coupled. However, in reality the frequency degeneracy is split and the eigenmodes are shifted due to inevitable manufacturing errors introduced in fabricating 20,000 cavities. This gives rise to a transverse coupling in the horizontal-vertical motion and can readily lead to a dilution in the emittance in the vertical plane. We investigate means to ameliorate this effect dilution by splitting the horizontal-vertical tune of the lattice.
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 902486
Report Number(s):SLAC-PUB-12469
TRN: US0702848
DOE Contract Number:AC02-76SF00515
Resource Type:Conference
Resource Relation:Conference: Prepared for European Particle Accelerator Conference (EPAC 06), Edinburgh, Scotland, 26-30 Jun 2006
Research Org:Stanford Linear Accelerator Center (SLAC)
Sponsoring Org:USDOE
Country of Publication:United States
Language:English
Subject: 43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; A CENTERS; ACCELERATORS; CAVITIES; DILUTION; DIPOLES; LINEAR ACCELERATORS; MANUFACTURING; MITIGATION Accelerators,ACCPHY