DocumentCode
1982155
Title
Transition crossing in the Fermilab Main Ring, past and present
Author
Kourbanis, I. ; Ng, K.Y.
Author_Institution
Fermi Nat. Accel. Lab., Batavia, IL, USA
fYear
1993
fDate
17-20 May 1993
Firstpage
3630
Abstract
A recent installation of passive mode dampers in the Booster has eliminated most of the longitudinal emittance blowup of intense bunches due to coupled-bunch instabilities. As a result, high intensity effects (negative-mass instability) dominate the present transition crossing in the Main Ring for the high-intensity cycles. A negative-mass stability limit is derived for transition crossing in the Main Ring and recent observations of high frequency signals around transition is presented. Finally, some predictions about the effect of the negative mass instability on the transition in the Main Ring with the future upgrades are attempted
Keywords
beam handling techniques; particle beam diagnostics; proton accelerators; synchrotrons; Fermilab Main Ring; coupled-bunch instabilities; high intensity effects; longitudinal emittance blowup; negative-mass instability; negative-mass stability limit; passive mode dampers; Displays; Educational institutions; Frequency; Laboratories; Monitoring; Pulse amplifiers; Pulse generation; Radiofrequency amplifiers; Stability; Switches;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location
Washington, DC
Print_ISBN
0-7803-1203-1
Type
conf
DOI
10.1109/PAC.1993.309740
Filename
309740
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