Magnetic field adjusting center rods for cyclotron a magnet for

Details Magnetic field adjusting center rods for cyclotron a magnet for Magnetic field adjusting center rods for cyclotron a magnet for

1996-10-17

1998-04-14

O'Shea, Sandra L.

Electric lamp and discharge devices: systems

High energy particle accelerator tube

Magnetic field acceleration means

315500, 313 62, H05H 1300

Patent

active

057396469

ABSTRACT:
A pair of magnetic field adjusting center rods are inserted in central portions of a pair of pole pieces of a magnet included in a cyclotron. One of the magnetic field adjusting center rods is provided with an ion source receiving hole and the other is provided with a magnetic field adjusting recess coaxially with the ion source receiving hole. The magnetic field adjusting center rods are provided at their ends facing each other with magnetic field correcting projections, respectively. The magnetic field correcting projections project toward each other to form pole faces facing each other with a small air gap. Thus, irregularities in a magnetic field created between the pole pieces are corrected so that the dispersion of ion beams and the distortion of an orbit of ions can be prevented.

REFERENCES:
patent: 3175131 (1965-03-01), Burleigh et al.
patent: 4641104 (1987-02-01), Blosser et al.
patent: 4996496 (1991-02-01), Kitamura et al.
Patent Abstracts of Japan, vol. 2, No. 151, Dec. 18, 1978 & JP53120099 (Japan Steel Works Ltd.).

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