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Title: Tune compensation in nearly scaling fixed field alternating gradient accelerators

Abstract

In this paper, we investigate the stability of the particle trajectories in fixed field alternating gradient accelerators (FFAs) in the presence of field errors. The emphasis is on the scaling radial sector FFA type: A collaboration work is ongoing in view of better understanding the properties of the 150 MeV scaling FFA at Kyoto University Institute for Integrated Radiation and Nuclear Science in Japan and progress toward high-intensity operation. Analysis of certain types of field imperfections revealed some interesting features that required the development of an analytical model based on the scalloping angle of the orbits. This helped explain some of the experimental results as well as generalize the concept of a scaling FFA to a nonscaling one for which the tune variations obey a well-defined law. Based on this, a compensation scheme of tune variations in imperfect scaling FFAs is presented. This is the cornerstone of a novel concept of a fixed tune FFA in which the scaling is not achieved at every azimuthal position of the ring but rather in an average sense.

Authors:
ORCiD logo [1];  [2]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1631943
Report Number(s):
BNL-215964-2020-JAAM
Journal ID: ISSN 2469-9888; PRABCJ
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 23; Journal Issue: 5; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Haj Tahar, M., and Méot, F. Tune compensation in nearly scaling fixed field alternating gradient accelerators. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevAccelBeams.23.054003.
Haj Tahar, M., & Méot, F. Tune compensation in nearly scaling fixed field alternating gradient accelerators. United States. https://doi.org/10.1103/PhysRevAccelBeams.23.054003
Haj Tahar, M., and Méot, F. Fri . "Tune compensation in nearly scaling fixed field alternating gradient accelerators". United States. https://doi.org/10.1103/PhysRevAccelBeams.23.054003. https://www.osti.gov/servlets/purl/1631943.
@article{osti_1631943,
title = {Tune compensation in nearly scaling fixed field alternating gradient accelerators},
author = {Haj Tahar, M. and Méot, F.},
abstractNote = {In this paper, we investigate the stability of the particle trajectories in fixed field alternating gradient accelerators (FFAs) in the presence of field errors. The emphasis is on the scaling radial sector FFA type: A collaboration work is ongoing in view of better understanding the properties of the 150 MeV scaling FFA at Kyoto University Institute for Integrated Radiation and Nuclear Science in Japan and progress toward high-intensity operation. Analysis of certain types of field imperfections revealed some interesting features that required the development of an analytical model based on the scalloping angle of the orbits. This helped explain some of the experimental results as well as generalize the concept of a scaling FFA to a nonscaling one for which the tune variations obey a well-defined law. Based on this, a compensation scheme of tune variations in imperfect scaling FFAs is presented. This is the cornerstone of a novel concept of a fixed tune FFA in which the scaling is not achieved at every azimuthal position of the ring but rather in an average sense.},
doi = {10.1103/PhysRevAccelBeams.23.054003},
journal = {Physical Review Accelerators and Beams},
number = 5,
volume = 23,
place = {United States},
year = {2020},
month = {5}
}

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Works referenced in this record:

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