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Estimate of the longitudinal and transverse impedances of the main ring in the TeV I project [electronic resource].

Published
Batavia, Ill. : Fermi National Accelerator Laboratory, 1986.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 26 : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
To guarantee the successful performance of the Main Ring in Tevatron I, its stability limits and impedances have to be estimated and controlled. The impedances of the Main Ring are estimated, considering contributions from the bellows, beam position monitors, wall resistivity, kickers and Lambertsons. The estimations of the contributions to the longitudinal and transverse impedances are tabulated and plotted. The stability limits for the worst situation are also tabulated for comparison. The slow-growing single bunch instability caused by longitudinal mode coupling is found to be safe. The corresponding instability caused by transverse mode coupling is not. The fast-growing longitudinal microwave instability is found to be driven by the sharp resonances of the bellows and beam monitors and may be the broad resonances of the Lambertsons also. The fast-growing transverse microwave instability is found to be safe. It is found that, to have stability, the bellows have to be shielded and the beam monitors terminated at the ends instead of the center. The slow-growing transverse mode coupling is found to be curable by feedback. 6 tabs., 7 figs. (LEW)
Report Numbers
E 1.99:fnal-tm-1388
fnal-tm-1388
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Note
Published through SciTech Connect.
02/01/1986.
"fnal-tm-1388"
"DE86008122"
Ng, K.Y.
Funding Information
AC02-76CH03000
View MARC record | catkey: 14699361