Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers
Abstract
A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations (dB/dt) in the particle beam.
- Inventors:
- Issue Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (USA)
- OSTI Identifier:
- 5969105
- Patent Number(s):
- 7502589
- Application Number:
- ON: DE91011632; PPN: US 7-502589
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; ACCELERATORS; EDDY CURRENTS; MAGNETIC FIELDS; CORRECTIONS; ERRORS; INVENTIONS; MAGNET COILS; PRESSURE VESSELS; CONTAINERS; CURRENTS; ELECTRIC COILS; ELECTRIC CURRENTS; ELECTRICAL EQUIPMENT; EQUIPMENT; 430303* - Particle Accelerators- Experimental Facilities & Equipment
Citation Formats
Danby, G T, and Jackson, J W. Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers. United States: N. p., 1990.
Web.
Danby, G T, & Jackson, J W. Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers. United States.
Danby, G T, and Jackson, J W. Mon .
"Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers". United States.
@article{osti_5969105,
title = {Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers},
author = {Danby, G T and Jackson, J W},
abstractNote = {A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations (dB/dt) in the particle beam.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 19 00:00:00 EST 1990},
month = {Mon Mar 19 00:00:00 EST 1990}
}