Optimization of low aspect ratio, iron dominated dipole magnets
Abstract
A study of the optimization of iron dominated dipole magnets with pole face widths comparable or less than the gap size, i.e., low aspect ratio (AR), is conducted using both theoretical and computational approaches. This regime of magnet design is particularly relevant in the context of laser plasma accelerators (LPA) due to unique beam parameters and geometric constraints, namely large energy spreads and the requirement for large apertures to accommodate drive laser passage. The breakdown of commonly employed approximations and rules of thumb in typical AR >> 1 magnet design is examined. A library of generalized, optimized pole face geometries is provided to expedite optimization of future magnets. Finally, this methodology is used to design an electromagnetic chicane which has been fabricated, validated, and is currently in use in an x-ray free electron laser driven LPA experiment at LBNL.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS); Gordon and Betty Moore Foundation
- OSTI Identifier:
- 1503361
- Alternate Identifier(s):
- OSTI ID: 1604676
- Grant/Contract Number:
- SC0014664; SC0009914; AC02-05CH11231; GBMF4898
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 3; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; beam optics; laser wakefield acceleration; magnetism; room-temperature magnet calculations; magnetic systems
Citation Formats
Majernik, N., Barber, S. K., van Tilborg, J., Rosenzweig, J. B., and Leemans, W. P. Optimization of low aspect ratio, iron dominated dipole magnets. United States: N. p., 2019.
Web. doi:10.1103/PhysRevAccelBeams.22.032401.
Majernik, N., Barber, S. K., van Tilborg, J., Rosenzweig, J. B., & Leemans, W. P. Optimization of low aspect ratio, iron dominated dipole magnets. United States. https://doi.org/10.1103/PhysRevAccelBeams.22.032401
Majernik, N., Barber, S. K., van Tilborg, J., Rosenzweig, J. B., and Leemans, W. P. Wed .
"Optimization of low aspect ratio, iron dominated dipole magnets". United States. https://doi.org/10.1103/PhysRevAccelBeams.22.032401.
@article{osti_1503361,
title = {Optimization of low aspect ratio, iron dominated dipole magnets},
author = {Majernik, N. and Barber, S. K. and van Tilborg, J. and Rosenzweig, J. B. and Leemans, W. P.},
abstractNote = {A study of the optimization of iron dominated dipole magnets with pole face widths comparable or less than the gap size, i.e., low aspect ratio (AR), is conducted using both theoretical and computational approaches. This regime of magnet design is particularly relevant in the context of laser plasma accelerators (LPA) due to unique beam parameters and geometric constraints, namely large energy spreads and the requirement for large apertures to accommodate drive laser passage. The breakdown of commonly employed approximations and rules of thumb in typical AR >> 1 magnet design is examined. A library of generalized, optimized pole face geometries is provided to expedite optimization of future magnets. Finally, this methodology is used to design an electromagnetic chicane which has been fabricated, validated, and is currently in use in an x-ray free electron laser driven LPA experiment at LBNL.},
doi = {10.1103/PhysRevAccelBeams.22.032401},
journal = {Physical Review Accelerators and Beams},
number = 3,
volume = 22,
place = {United States},
year = {Wed Mar 27 00:00:00 EDT 2019},
month = {Wed Mar 27 00:00:00 EDT 2019}
}
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevAccelBeams.22.032401
https://doi.org/10.1103/PhysRevAccelBeams.22.032401
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 2 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Experimental Observation of Optical Rotation Generated in Vacuum by a Magnetic Field
journal, March 2006
- Zavattini, E.; Zavattini, G.; Ruoso, G.
- Physical Review Letters, Vol. 96, Issue 11
Free-electron lasers driven by laser plasma accelerators
conference, January 2017
- van Tilborg, J.; Barber, S. K.; Isono, F.
- ADVANCED ACCELERATOR CONCEPTS: 17th Advanced Accelerator Concepts Workshop, AIP Conference Proceedings
GeV electron beams from a centimetre-scale accelerator
journal, September 2006
- Leemans, W. P.; Nagler, B.; Gonsalves, A. J.
- Nature Physics, Vol. 2, Issue 10
High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding
journal, September 2004
- Geddes, C. G. R.; Toth, Cs.; van Tilborg, J.
- Nature, Vol. 431, Issue 7008
Electron-Yield Enhancement in a Laser-Wakefield Accelerator Driven by Asymmetric Laser Pulses
journal, October 2002
- Leemans, W. P.; Catravas, P.; Esarey, E.
- Physical Review Letters, Vol. 89, Issue 17
Miniature permanent magnet for table-top NMR
journal, January 2003
- Moresi, Giorgio; Magin, Richard
- Concepts in Magnetic Resonance, Vol. 19B, Issue 1, p. 35-43
Physics of laser-driven plasma-based electron accelerators
journal, August 2009
- Esarey, E.; Schroeder, C. B.; Leemans, W. P.
- Reviews of Modern Physics, Vol. 81, Issue 3
Application of permanent magnets in accelerators and electron storage rings (invited)
journal, April 1985
- Halbach, Klaus
- Journal of Applied Physics, Vol. 57, Issue 8
Wiggle plane focusing in linear wigglers
journal, September 1985
- Scharlemann, E. T.
- Journal of Applied Physics, Vol. 58, Issue 6
Particle swarm optimization
conference, January 1995
- Kennedy, J.; Eberhart, R.
- Proceedings of ICNN'95 - International Conference on Neural Networks
Turbulent inward pinch of plasma confined by a levitated dipole magnet
journal, January 2010
- Boxer, A. C.; Bergmann, R.; Ellsworth, J. L.
- Nature Physics, Vol. 6, Issue 3
Nonlinear Energy Harvesting
journal, February 2009
- Cottone, F.; Vocca, H.; Gammaitoni, L.
- Physical Review Letters, Vol. 102, Issue 8
Design Principles and Clinical Possibilities with A New Generation of Radiation Therapy Equipment: A Review
journal, January 1987
- Brahme, A.
- Acta Oncologica, Vol. 26, Issue 6
Heavy-ion tumor therapy: Physical and radiobiological benefits
journal, February 2010
- Schardt, Dieter; Elsässer, Thilo; Schulz-Ertner, Daniela
- Reviews of Modern Physics, Vol. 82, Issue 1, p. 383-425
Design of 11 T Twin-Aperture ${\rm Nb}_{3}{\rm Sn}$ Dipole Demonstrator Magnet for LHC Upgrades
journal, June 2012
- Karppinen, M.; Andreev, N.; Apollinari, G.
- IEEE Transactions on Applied Superconductivity, Vol. 22, Issue 3
3-D optimal shape design of pole piece in permanent magnet MRI using parameterized nonlinear design sensitivity analysis
journal, April 2006
- Jae Seop Ryu,
- IEEE Transactions on Magnetics, Vol. 42, Issue 4
Design of a Canted-Cosine-Theta Superconducting Dipole Magnet for Future Colliders
journal, June 2017
- Caspi, Shlomo; Arbelaez, Diego; Brouwer, Lucas
- IEEE Transactions on Applied Superconductivity, Vol. 27, Issue 4