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Title: Improving the Fermilab booster emittance

Abstract

Demand of high luminosity in the Tevatron collider in Fermilab makes the small beam emittance coming out of the 8 GeV Booster a highly desirable feature. This is because Booster bunches with small emittance, when eventually coalesced into Main Ring bunches, will ensure a high luminosity in the collider. Efforts have been made to identify factors limiting the phase space density in both transverse and longitudinal dimensions. The experimental result points to space charge induced tune spread at low energy as the main factor limiting the transverse phase space density, and the space charge induced phase space dilution at transition and longitudinal coupled bunch instability as the factors limiting the longitudinal phase space density. To counteract these factors, a set of harmonic correction sextupoles and skew sextupoles were implemented to reduce the third order resonances in the transverse case. In the longitudinal case a ..gamma../sub t/-jump system was implemented to ease the bunch tumbling after transition, and various schemes to damp the longitudinal coupled bunch instability are either implemented or being reviewed. Future plans and efforts will be mentioned briefly at the end of this article. 3 refs., 8 figs., 1 tab.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (USA)
OSTI Identifier:
6841153
Report Number(s):
FNAL/C-88/102; CONF-880695-61
ON: DE88017125; TRN: 88-034071
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: 1. European particle accelerator conference, Rome, Italy, 7 Jun 1988; Other Information: Paper copy only, copy does not permit microfiche production
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; PARTICLE BOOSTERS; BEAM EMITTANCE; BEAM BUNCHING; FERMILAB TEVATRON; MODIFICATIONS; PHASE SPACE; ACCELERATORS; BEAM DYNAMICS; CYCLIC ACCELERATORS; MATHEMATICAL SPACE; SPACE; SYNCHROTRONS; 430200* - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics

Citation Formats

Chao, Y, Crisp, J, Holmes, S, Lackey, J, and Merz, W. Improving the Fermilab booster emittance. United States: N. p., 1988. Web.
Chao, Y, Crisp, J, Holmes, S, Lackey, J, & Merz, W. Improving the Fermilab booster emittance. United States.
Chao, Y, Crisp, J, Holmes, S, Lackey, J, and Merz, W. Thu . "Improving the Fermilab booster emittance". United States. https://www.osti.gov/servlets/purl/6841153.
@article{osti_6841153,
title = {Improving the Fermilab booster emittance},
author = {Chao, Y and Crisp, J and Holmes, S and Lackey, J and Merz, W},
abstractNote = {Demand of high luminosity in the Tevatron collider in Fermilab makes the small beam emittance coming out of the 8 GeV Booster a highly desirable feature. This is because Booster bunches with small emittance, when eventually coalesced into Main Ring bunches, will ensure a high luminosity in the collider. Efforts have been made to identify factors limiting the phase space density in both transverse and longitudinal dimensions. The experimental result points to space charge induced tune spread at low energy as the main factor limiting the transverse phase space density, and the space charge induced phase space dilution at transition and longitudinal coupled bunch instability as the factors limiting the longitudinal phase space density. To counteract these factors, a set of harmonic correction sextupoles and skew sextupoles were implemented to reduce the third order resonances in the transverse case. In the longitudinal case a ..gamma../sub t/-jump system was implemented to ease the bunch tumbling after transition, and various schemes to damp the longitudinal coupled bunch instability are either implemented or being reviewed. Future plans and efforts will be mentioned briefly at the end of this article. 3 refs., 8 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/6841153}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {6}
}

Conference:
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