Magnetic field adjustment structure and method for a tapered wiggler
AssigneeThe United States of America as represented by the United States Department of Energy
InventorKlaus Halbach
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Abstract
An improved method and structure is disclosed for adjusting the magnetic field generated by a group of electromagnet poles spaced along the path of a charged particle beam to compensate for energy losses in the charged particles which comprises providing more than one winding on at least some of the electromagnet poles; connecting one respective winding on each of several consecutive adjacent electromagnet poles to a first power supply, and the other respective winding on the electromagnet pole to a different power supply in staggered order; and independently adjusting one power supply to independently vary the current in one winding on each electromagnet pole in a group whereby the magnetic field strength of each of a group of electromagnet poles may be changed in smaller increments.
Claims18
An improved method for adjusting the magnetic field in a wiggler generated by electromagnet poles spaced along the path of a charged particle beam to compensate for energy losses in the charged particles which comprises:
- (a) providing more than one winding on at least some of said electromagnet poles;
- (b) connecting one of said windings on each of a group of adjacent electromagnet poles to a first power supply, and another winding on electromagnet poles having more than one winding to a second power supply;
- and
- (c) independently adjusting one power supply to independently vary the current in one of said windings on a group of adjacent electromagnet poles;
- whereby the magnetic field strength of a group of adjacent electromagnet poles in a wiggler may be changed in smaller increments without causing net angular deflection or lateral displacement of the beam.
An improved method for adjusting the magnetic field in a wiggler generated by a plurality of electromagnet poles spaced along the path of a charged particle beam to compensate for energy losses in the charged particles which comprises:
- (a) generally providing two windings on each of said electromagnet poles with the total number of turns in the combined windings on each electromagnet pole being equal;
- (b) connecting in series together one of said windings on each of a group of five adjacent electromagnet poles to a first power supply;
- (c) varying the number of turns on each of said group of five electromagnet poles connected in series in a binomial series of fourth order whereby the number of turns on the windings on the first and fifth magnet poles connected in series is one eight of the total number of turns on those magnet poles, the number of turns on the windings of the second and fourth magnet poles in said series connection being one half of the total number of turns on those magnet poles, and the number of turns on the third magnet pole connected in said series being three quarters of the total number of turns on that magnet pole;
- (d) connecting further power supplies in staggered order to one winding on each of five adjacent electromagnet poles wherein second power supply is connected to one winding of each of third through seventh electromagnet poles, a third power supply is connected to one winding on each of the fifth through ninth electromagnet poles, and each succeeding power supply is similarly connected to one winding of each electromagnet pole in successive sets of five electromagnet poles in a progression by two;
- and
- (e) independently adjusting one power supply to independently vary the current in one of said windings on said group of five adjacent electromagnet poles;
- whereby the magnetic field strength of each of said group of adjacent electromagnet poles may be changed in smaller increments.
An improved wiggler having means for adjusting the magnetic field generated by electromagnet poles spaced along the path of a charged particle beam to compensate for energy losses in the charged particles which comprises;
- (a) a plurality of windings on at least some of said electromagnet poles in said wiggler;
- (b) one of said windings on each of a group of adjacent electromagnet poles connected to a first power supply, and another winding on said electromagnet poles having more than one winding connected to a second power supply;
- and
- (c) means for independently adjusting one power supply to independently vary the current in one of said windings on a group of adjacent electromagnet poles;
- whereby the magnetic field strength of a group of adjacent electromagnet poles in said wiggler may be changed in smaller increments.
Dependencies are inferred from the claim text.