Linear fixed-field multipass arcs for recirculating linear accelerators
Abstract
Recirculating Linear Accelerators (RLA's) provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting the dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dog-bone RLA capable of transporting two beam passes with momenta different by a factor of two. Finally, we present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dog-bone RLA.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1074714
- Alternate Identifier(s):
- OSTI ID: 1045208
- Report Number(s):
- JLAB-ACP-12-1536; DOE/OR/23177-2120
Journal ID: ISSN 1098-4402; PRABFM; 060101
- Grant/Contract Number:
- AC05-06OR23177
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Special Topics. Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Special Topics. Accelerators and Beams Journal Volume: 15 Journal Issue: 6; Journal ID: ISSN 1098-4402
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Morozov, V. S., Bogacz, S. A., Roblin, Y. R., and Beard, K. B. Linear fixed-field multipass arcs for recirculating linear accelerators. United States: N. p., 2012.
Web. doi:10.1103/PhysRevSTAB.15.060101.
Morozov, V. S., Bogacz, S. A., Roblin, Y. R., & Beard, K. B. Linear fixed-field multipass arcs for recirculating linear accelerators. United States. https://doi.org/10.1103/PhysRevSTAB.15.060101
Morozov, V. S., Bogacz, S. A., Roblin, Y. R., and Beard, K. B. Thu .
"Linear fixed-field multipass arcs for recirculating linear accelerators". United States. https://doi.org/10.1103/PhysRevSTAB.15.060101.
@article{osti_1074714,
title = {Linear fixed-field multipass arcs for recirculating linear accelerators},
author = {Morozov, V. S. and Bogacz, S. A. and Roblin, Y. R. and Beard, K. B.},
abstractNote = {Recirculating Linear Accelerators (RLA's) provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting the dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dog-bone RLA capable of transporting two beam passes with momenta different by a factor of two. Finally, we present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dog-bone RLA.},
doi = {10.1103/PhysRevSTAB.15.060101},
journal = {Physical Review Special Topics. Accelerators and Beams},
number = 6,
volume = 15,
place = {United States},
year = {Thu Jun 14 00:00:00 EDT 2012},
month = {Thu Jun 14 00:00:00 EDT 2012}
}
https://doi.org/10.1103/PhysRevSTAB.15.060101
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