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Electromagnet for charged-particle apparatus

  • US 5,117,212 A
  • Filed: 01/11/1990
  • Issued: 05/26/1992
  • Est. Priority Date: 01/12/1989
  • Status: Expired due to Fees
First Claim
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1. An electromagnet for a charged-particle apparatus, comprising:

  • a principle coil equipped with at least one pair of coils arranged with an equilibrium orbit for charged particles therebetween and extending along said equilibium orbit;

    an iron core composed of return yokes surrounding and extending along said principal core, said return yokes providing a predetermined magnetic field density at both ends of said return yokes, and clamping plates provided at said both ends of said return yokes and having cavities through which said equilibrium orbit for charged particles runs; and

    steering magnets each composed of at least a pair of coils which are provided at opposed positions in each of said cavities formed in said clamping plates and which are arranged with said equilibrium for charged particles therebetween.

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