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Title: Time and momentum exchange for production and collection of intense antiproton beams at Fermilab

Abstract

Antiprotons for the Fermilab p/sup -/p colliding beam project are accumulated by rf stacking of successive 8 GeV antiproton batches in a storage ring using stochastic cooling to reduce both transverse and longitudinal emittance. The rate of accumulation is increased 15-fold by interchange of bunch length and momentum spread of the antiproton bunches in a special purpose debuncher ring. Tightly bunched antiprotons are produced at the target by 120 GeV protons from the Main Ring. From 2.5x10/sup 12/ protons every 2 seconds the debuncher receives 7x10/sup 7/ antiprotons within a momentum bite ..delta..p/p=3%. These antiprotons are injected into mismatched stationary rf buckets in the debuncher so that synchrotron oscillation produces bunch rotation. After 90/sup 0/ of rotation followed by adiabatic debunching, the narrow time spread has been converted into a momentum spread ..delta..p/p=.2%. The authors describe the rf technique used to shorten the bunches of the primary proton beam in the Main Ring and report test results. They also describe the complementary procedures to be used in the Debuncher and demonstrate the expected reduction of the momentum spread by particle tracking simulation.

Authors:
; ; ;
Publication Date:
Research Org.:
Fermilab, P.O. Box 500, Batavia, IL 60510
OSTI Identifier:
5529466
Report Number(s):
CONF-830311-
Journal ID: CODEN: IETNA; TRN: 84-000712
Resource Type:
Conference
Journal Name:
IEEE Trans. Nucl. Sci.; (United States)
Additional Journal Information:
Journal Volume: NS-30:4; Conference: Particle accelerator conference, Santa Fe, NM, USA, 21 Mar 1983
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; TEVATRON; BEAM BUNCHING; ANTIPROTON BEAMS; BEAM BUNCHERS; BEAM EMITTANCE; BEAM SHAPING; BEAM STACKING; COLLIDING BEAMS; ELECTRON COOLING; FERMILAB ACCELERATOR; GEV RANGE 01-10; PROTON BEAMS; RF SYSTEMS; SIMULATION; STORAGE RINGS; SYNCHROTRON OSCILLATIONS; ACCELERATORS; ANTINUCLEON BEAMS; ANTIPARTICLE BEAMS; BEAM COOLING; BEAM DYNAMICS; BEAMS; CYCLIC ACCELERATORS; ENERGY RANGE; GEV RANGE; NUCLEON BEAMS; OSCILLATIONS; PARTICLE BEAMS; SYNCHROTRONS; 430400* - Particle Accelerators- Storage Rings; 430200 - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics

Citation Formats

Griffin, J, MacLachlan, J, Ruggiero, A G, and Takayama, K. Time and momentum exchange for production and collection of intense antiproton beams at Fermilab. United States: N. p., 1983. Web.
Griffin, J, MacLachlan, J, Ruggiero, A G, & Takayama, K. Time and momentum exchange for production and collection of intense antiproton beams at Fermilab. United States.
Griffin, J, MacLachlan, J, Ruggiero, A G, and Takayama, K. Mon . "Time and momentum exchange for production and collection of intense antiproton beams at Fermilab". United States.
@article{osti_5529466,
title = {Time and momentum exchange for production and collection of intense antiproton beams at Fermilab},
author = {Griffin, J and MacLachlan, J and Ruggiero, A G and Takayama, K},
abstractNote = {Antiprotons for the Fermilab p/sup -/p colliding beam project are accumulated by rf stacking of successive 8 GeV antiproton batches in a storage ring using stochastic cooling to reduce both transverse and longitudinal emittance. The rate of accumulation is increased 15-fold by interchange of bunch length and momentum spread of the antiproton bunches in a special purpose debuncher ring. Tightly bunched antiprotons are produced at the target by 120 GeV protons from the Main Ring. From 2.5x10/sup 12/ protons every 2 seconds the debuncher receives 7x10/sup 7/ antiprotons within a momentum bite ..delta..p/p=3%. These antiprotons are injected into mismatched stationary rf buckets in the debuncher so that synchrotron oscillation produces bunch rotation. After 90/sup 0/ of rotation followed by adiabatic debunching, the narrow time spread has been converted into a momentum spread ..delta..p/p=.2%. The authors describe the rf technique used to shorten the bunches of the primary proton beam in the Main Ring and report test results. They also describe the complementary procedures to be used in the Debuncher and demonstrate the expected reduction of the momentum spread by particle tracking simulation.},
doi = {},
url = {https://www.osti.gov/biblio/5529466}, journal = {IEEE Trans. Nucl. Sci.; (United States)},
number = ,
volume = NS-30:4,
place = {United States},
year = {1983},
month = {8}
}

Conference:
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