Bevalac extraction
Abstract
This report will describe some of the general features of the Bevatron extraction system, primarily the dependence of the beam parameters and extraction magnet currents on the Bevalac field. The extraction magnets considered are: PFW, XPl, XP2, XS1, XS2, XM1, XM2, XM3, XQ3A and X03B. This study is based on 84 past tunes (from 1987 to the present) of various ions (p,He,O,Ne,Si,S,Ar,Ca,Ti,Fe,Nb,La,Au and U), for Bevalac fields from 1.749 to 12.575 kG, where all tunes included a complete set of beam line wire chamber pictures. The circulating beam intensity inside the Bevalac is measured with Beam Induction Electrodes (BIE) in the South Tangent Tank. The extracted beam intensity is usually measured with the Secondary Emission Monitor (SEM) in the F1-Box. For most of the tunes the extraction efficiency, as given by the SEM/BIE ratio, was not recorded in the MCR Log Book, but plotting the available Log Book data as a function of the Bevalac field, see Fig.9, we find that the extraction efficiency is typically between 30->60% with feedback spill.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)
- OSTI Identifier:
- 7252374
- Report Number(s):
- LBL-31967
ON: DE93001575
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; BEVALAC; BEAM EXTRACTION; BEAM EMITTANCE; MAGNETIC DIPOLES; MAGNETIC FIELDS; QUADRUPOLES; ACCELERATORS; CYCLIC ACCELERATORS; DIPOLES; MULTIPOLES; 430302* - Particle Accelerators- Injection & Extraction Systems
Citation Formats
Kalnins, J G, Krebs, G, Tekawa, M, Cowles, D, and Byrne, T. Bevalac extraction. United States: N. p., 1992.
Web. doi:10.2172/7252374.
Kalnins, J G, Krebs, G, Tekawa, M, Cowles, D, & Byrne, T. Bevalac extraction. United States. https://doi.org/10.2172/7252374
Kalnins, J G, Krebs, G, Tekawa, M, Cowles, D, and Byrne, T. 1992.
"Bevalac extraction". United States. https://doi.org/10.2172/7252374. https://www.osti.gov/servlets/purl/7252374.
@article{osti_7252374,
title = {Bevalac extraction},
author = {Kalnins, J G and Krebs, G and Tekawa, M and Cowles, D and Byrne, T},
abstractNote = {This report will describe some of the general features of the Bevatron extraction system, primarily the dependence of the beam parameters and extraction magnet currents on the Bevalac field. The extraction magnets considered are: PFW, XPl, XP2, XS1, XS2, XM1, XM2, XM3, XQ3A and X03B. This study is based on 84 past tunes (from 1987 to the present) of various ions (p,He,O,Ne,Si,S,Ar,Ca,Ti,Fe,Nb,La,Au and U), for Bevalac fields from 1.749 to 12.575 kG, where all tunes included a complete set of beam line wire chamber pictures. The circulating beam intensity inside the Bevalac is measured with Beam Induction Electrodes (BIE) in the South Tangent Tank. The extracted beam intensity is usually measured with the Secondary Emission Monitor (SEM) in the F1-Box. For most of the tunes the extraction efficiency, as given by the SEM/BIE ratio, was not recorded in the MCR Log Book, but plotting the available Log Book data as a function of the Bevalac field, see Fig.9, we find that the extraction efficiency is typically between 30->60% with feedback spill.},
doi = {10.2172/7252374},
url = {https://www.osti.gov/biblio/7252374},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 1992},
month = {Sat Feb 01 00:00:00 EST 1992}
}