×

Circular induction accelerator for borehole logging

  • US 5,122,662 A
  • Filed: 10/16/1990
  • Issued: 06/16/1992
  • Est. Priority Date: 10/16/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. In a magnetic induction accelerator including a magnetic induction accelerator including a magnetic circuit having a field magnet, a pair of opposed generally circular pole pieces, a core magnet, an excitation circuit including a field coil surrounding said field magnet and said core magnet and a core coil surrounding said core magnet, an annular acceleration chamber interposed between said pole pieces, means for applying time-varying acceleration voltage pulses across said circuit for accelerating charged particles in said acceleration chamber, means for injecting charged particles into the acceleration chamber, means for compressing the particle orbits to trap particles within generally circular orbits in said acceleration chamber, and means for expanding the particle orbits to eject particles from said generally circular orbits, the improvement comprising:

  • said field magnet and said pole pieces being composed of a class of ferrite having the general formula M2+ Fe23+ O4, where M represents two or more divalent metal ions from the group consisting of Mn, Zn and Ni; and

    said core magnet comprises at least one closed loop section, with one leg of each loop passing axially through the center of the circular pole pieces and through said core coil.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×