3D field harmonics
Abstract
We have developed an harmonic representation for the three dimensional field components within the windings of accelerator magnets. The form by which the field is presented is suitable for interfacing with other codes that make use of the 3D field components (particle tracking and stability). The field components can be calculated with high precision and reduced cup time at any location (r,{theta},z) inside the magnet bore. The same conductor geometry which is used to simulate line currents is also used in CAD with modifications more readily available. It is our hope that the format used here for magnetic fields can be used not only as a means of delivering fields but also as a way by which beam dynamics can suggest correction to the conductor geometry. 5 refs., 70 figs.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)
- OSTI Identifier:
- 5232433
- Report Number(s):
- LBL-30313; SC-MAG-328
ON: DE92000657; TRN: 91-028739
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; MAGNETIC FIELDS; HARMONICS; BEAM DYNAMICS; MAGNETIC DIPOLES; MAGNETS; THREE-DIMENSIONAL CALCULATIONS; DIPOLES; MULTIPOLES; OSCILLATIONS; 430200* - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics
Citation Formats
Caspi, S., Helm, M., and Laslett, L.J. 3D field harmonics. United States: N. p., 1991.
Web. doi:10.2172/5232433.
Caspi, S., Helm, M., & Laslett, L.J. 3D field harmonics. United States. doi:10.2172/5232433.
Caspi, S., Helm, M., and Laslett, L.J. Sat .
"3D field harmonics". United States.
doi:10.2172/5232433. https://www.osti.gov/servlets/purl/5232433.
@article{osti_5232433,
title = {3D field harmonics},
author = {Caspi, S. and Helm, M. and Laslett, L.J.},
abstractNote = {We have developed an harmonic representation for the three dimensional field components within the windings of accelerator magnets. The form by which the field is presented is suitable for interfacing with other codes that make use of the 3D field components (particle tracking and stability). The field components can be calculated with high precision and reduced cup time at any location (r,{theta},z) inside the magnet bore. The same conductor geometry which is used to simulate line currents is also used in CAD with modifications more readily available. It is our hope that the format used here for magnetic fields can be used not only as a means of delivering fields but also as a way by which beam dynamics can suggest correction to the conductor geometry. 5 refs., 70 figs.},
doi = {10.2172/5232433},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Mar 30 00:00:00 EST 1991},
month = {Sat Mar 30 00:00:00 EST 1991}
}
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These note aim to set forth, systematically and from elementary beginnings, some constructs that arise from study of the three-dimensional rotation group.
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FIELD HARMONICS IN THE CYCLOTRON MAGNET. Technical Report No. 4
The rebuilt cyclotron uses four flat spiral shims to introduce spiral modulation of the magnetic field in order to in approve axial stability and permit independent synchronization of the cyclotron frequency with the frequency of the fixed radiofrequency oscillator. The amplitudes of the various harmonics in the field are of interest in determining the focusing and defocusing effects on the particles. Measurement of the field harmonics are considered. (W.D.M.)