Transition crossing in the Fermilab Main Ring, past and present

Conference · Sat May 01 00:00:00 EDT 1993

OSTI ID:10161716

Kourbanis, I; Ng, K Y

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.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 10161716
• Report Number(s): FNAL/C-93/119; CONF-930511-140; ON: DE93014923
• Resource Relation: Conference: PAC `93: international particle accelerator conference,Washington, DC (United States),17-20 May 1993; Other Information: PBD: May 1993
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BUNCHING
INSTABILITY
PARTICLE BOOSTERS
DAMPING
FERMILAB ACCELERATOR
BEAM EMITTANCE
COLLIDING BEAMS
430200
430303
BEAM DYNAMICS, FIELD CALCULATIONS, AND ION OPTICS
EXPERIMENTAL FACILITIES AND EQUIPMENT