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Title: Acceleration of polarized He-3 in Booster and AGS

Authors:
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1346752
Report Number(s):
BNL-113646-2017-CP
R&D Project: KBCH139; 18032; KB0202011
DOE Contract Number:
SC00112704
Resource Type:
Conference
Resource Relation:
Conference: 22nd International Spin Symposium (SPIN16); iHotel Conference Center, University of Illinois at Urbana-Champaign, Champaign, IL 61801; 20160925 through 20160930
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Hock K. Acceleration of polarized He-3 in Booster and AGS. United States: N. p., 2016. Web.
Hock K. Acceleration of polarized He-3 in Booster and AGS. United States.
Hock K. 2016. "Acceleration of polarized He-3 in Booster and AGS". United States. doi:. https://www.osti.gov/servlets/purl/1346752.
@article{osti_1346752,
title = {Acceleration of polarized He-3 in Booster and AGS},
author = {Hock K.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 9
}

Conference:
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  • The Medium-energy Electron Ion Collider (MEIC), proposed by Jefferson Lab, consists of a series of accelerators. The electron collider ring accepts electrons from CEBAF at energies from 3 to 12 GeV. Protons and ions are delivered to a booster and captured in a long bunch before being ramped and transferred to the ion collider ring. The ion collider ring accelerates a small number of long ion bunches to colliding energy before they are re-bunched into a high frequency train of very short bunches for colliding. Two sets of low frequency RF systems are needed for the long ion bunch energymore » ramping in the booster and ion collider ring. Another two sets of high frequency RF cavities are needed for re-bunching in the ion collider ring and compensating synchrotron radiation energy loss in the electron collider ring. The requirements from energy ramping, ion beam bunching, electron beam energy compensation, collective effects, beam loading and feedback capability, RF power capability, etc. are presented. The preliminary designs of these RF systems are presented. Concepts for the baseline cavity and RF station configurations are described, as well as some options that may allow more flexible injection and acceleration schemes.« less
  • We study the evolution of the longitudinal phase space during acceleration from 0.797-7.3 GeV in the LAMPF II booster. This machine is planned to accelerate 150 ..mu..A of protons using a 60 Hz repetition rate. A multiparticle simulation program was used to model the acceleration with space charge included. The bunch population of 2.5 x 10/sup 11/ protons was represented by 1000 macroparticles. During acceleration the rms longitudinal emittance grows by 3% and two particles are lost out of the separatrix. 2 refs., 11 figs., 1 tab.
  • We study the evolution of the longitudinal phase space during acceleration from 0.797-7.3 GeV in the LAMPF II booster. This machine is planned to accelerate 150 /sigma phi/A of protons using a 60 Hz repetition rate. A multiparticle simulation program was used to model the acceleration with space charge included. The bunch population of 2.5 x 10 protons was represented by 1000 macroparticles. During acceleration the rms longitudinal emittance grows by 3% and two particles are lost out of the separatrix.
  • The KEK booster synchrotron is a rapid-cycling machine with a repetition rate of 20 Hz. The rf system was designed for accelerating the proton beam injected at 20 MeV up to its final energy of 500 MeV. The booster succeeded in accelerating 8 x 10/sup 10/ protons/pulse to the designed energy on Dec. 12, 1974. Since then the beam intensity was steadily increased to 5.7 x 10/sup 11/ protons/pulse with adjustments and improvements of the machine components, especially of the rf system. An outline of the rf system and the present status of its operation are presented. Main parameters characterizingmore » the rf system are listed, and accelerating parameters and the estimated beam characteristics are shown.« less
  • During adiabatic capture and initial 30 MHz beam bunching in the Fermilab Booster, very high frequency structure is observed on the bunches. The structure has the appearance of a bunch shape oscillation instability which appears and disappears in a sporadic manner. A computer simulation of injection dynamics reveals the fact that the observed structure is related to re-appearance of the injected linac bunch structure after relocation within the booster phase space.