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Title: Isochronous (CW) Non-Scaling FFAGs: Design and Simulation

Abstract

The drive for higher beam power, high duty cycle, and reliable beams at reasonable cost has focused international attention and design effort on fixed field accelerators, notably Fixed-Field Alternating Gradient accelerators (FFAGs). High-intensity GeV proton drivers encounter duty cycle and space-charge limits in the synchrotron and machine size concerns in the weaker-focusing cyclotrons. A 10-20 MW proton driver is challenging, if even technically feasible, with conventional accelerators--with the possible exception of a SRF linac, which has a large associated cost and footprint. Recently, the concept of isochronous orbits has been explored and developed for nonscaling FFAGs using powerful new methodologies in FFAG accelerator design and simulation. The property of isochronous orbits enables the simplicity of fixed RF and, by tailoring a nonlinear radial field profile, the FFAG can remain isochronous beyond the energy reach of cyclotrons, well into the relativistic regime. With isochronous orbits, the machine proposed here has the high average current advantage and duty cycle of the cyclotron in combination with the strong focusing, smaller losses, and energy variability that are more typical of the synchrotron. This paper reports on these new advances in FFAG accelerator technology and presents advanced modeling tools for fixed-field accelerators unique to themore » code COSY INFINITY.« less

Authors:
 [1]; ;  [2];  [3]
  1. Fermi National Accelerator Laboratory, P.O Box 500, Batavia, IL 60510 (United States)
  2. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48224 (United States)
  3. Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States)
Publication Date:
OSTI Identifier:
21428857
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1299; Journal Issue: 1; Conference: 14. advanced accelerator concepts workshop, Annapolis, MD (United States), 13-19 Jun 2010; Other Information: DOI: 10.1063/1.3520412; (c) 2010 American Institute of Physics; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; C CODES; COMPUTERIZED SIMULATION; COSY STORAGE RING; CYCLOTRONS; DESIGN; ELECTRON BEAMS; GEV RANGE; LINEAR ACCELERATORS; ORBITS; RELATIVISTIC RANGE; SPACE CHARGE; SYNCHROTRON RADIATION; ACCELERATORS; BEAMS; BREMSSTRAHLUNG; COMPUTER CODES; CYCLIC ACCELERATORS; ELECTROMAGNETIC RADIATION; ENERGY RANGE; LEPTON BEAMS; PARTICLE BEAMS; RADIATIONS; SIMULATION; STORAGE RINGS; SYNCHROTRONS

Citation Formats

Johnstone, C, Berz, M, Makino, K, and Snopok, P. Isochronous (CW) Non-Scaling FFAGs: Design and Simulation. United States: N. p., 2010. Web. doi:10.1063/1.3520412.
Johnstone, C, Berz, M, Makino, K, & Snopok, P. Isochronous (CW) Non-Scaling FFAGs: Design and Simulation. United States. https://doi.org/10.1063/1.3520412
Johnstone, C, Berz, M, Makino, K, and Snopok, P. 2010. "Isochronous (CW) Non-Scaling FFAGs: Design and Simulation". United States. https://doi.org/10.1063/1.3520412.
@article{osti_21428857,
title = {Isochronous (CW) Non-Scaling FFAGs: Design and Simulation},
author = {Johnstone, C and Berz, M and Makino, K and Snopok, P},
abstractNote = {The drive for higher beam power, high duty cycle, and reliable beams at reasonable cost has focused international attention and design effort on fixed field accelerators, notably Fixed-Field Alternating Gradient accelerators (FFAGs). High-intensity GeV proton drivers encounter duty cycle and space-charge limits in the synchrotron and machine size concerns in the weaker-focusing cyclotrons. A 10-20 MW proton driver is challenging, if even technically feasible, with conventional accelerators--with the possible exception of a SRF linac, which has a large associated cost and footprint. Recently, the concept of isochronous orbits has been explored and developed for nonscaling FFAGs using powerful new methodologies in FFAG accelerator design and simulation. The property of isochronous orbits enables the simplicity of fixed RF and, by tailoring a nonlinear radial field profile, the FFAG can remain isochronous beyond the energy reach of cyclotrons, well into the relativistic regime. With isochronous orbits, the machine proposed here has the high average current advantage and duty cycle of the cyclotron in combination with the strong focusing, smaller losses, and energy variability that are more typical of the synchrotron. This paper reports on these new advances in FFAG accelerator technology and presents advanced modeling tools for fixed-field accelerators unique to the code COSY INFINITY.},
doi = {10.1063/1.3520412},
url = {https://www.osti.gov/biblio/21428857}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1299,
place = {United States},
year = {Thu Nov 04 00:00:00 EDT 2010},
month = {Thu Nov 04 00:00:00 EDT 2010}
}