Cyclotron

Details Cyclotron Cyclotron

2003-11-14

2008-11-04

Berman, Jack I. (Department: 2881)

Electric lamp and discharge devices: systems

High energy particle accelerator tube

Magnetic field acceleration means

C315S501000, C315S506000

Reexamination Certificate

active

07446490

ABSTRACT:
The invention relates to a cyclotron which can produce a beam of accelerated charged particles that are intended for the irradiation of at least one target (200). The inventive cyclotron consists of a magnetic circuit which essentially comprises: an electromagnet with at least two poles (1, 1′), namely an upper pole (1) and a lower pole (1′), which are disposed symmetrically in relation to a mid-plane (110) which is perpendicular to the central axis (100) of the cyclotron and which are separated by a gap (120) containing the circulating charged particles and return flux (2) in order to close the aforementioned magnetic circuit; and a pair of main induction coils (5, 5′) which are used to create an essentially-constant main induction field in the gap between poles1and1′. The invention is characterised in that it comprises means of centring the above-mentioned beam, consisting of at least one pair of bucking coils (6, 7) which are supplied by an electrical source (8) and which can modulate the intensity of the main induction field produced by the main coils (5, 5′), in order to increase the intensity of the induction field in a first area of the cyclotron and to reduce the intensity of the induction field in a second area of the cyclotron, which is diametrically opposed to the central axis (100) of the cyclotron.

REFERENCES:
patent: 3398308 (1968-08-01), Steimel
patent: 3868522 (1975-02-01), Bigham et al.
patent: 4639634 (1987-01-01), Meyrand
patent: 5868077 (1999-02-01), Kuznetsov
patent: 1 069 809 (2001-01-01), None
patent: 1.395.308 (1965-03-01), None
Baartmen et al. “A 30 McV H Cyclotron for Isotope Production” TRIUMF and Ebco Industries Ltd. p. 1623-1625.
Song et al. “Characteristics of INER TR30/15 H/sup-//D/sup-/Compact Cyclotron” Nuclear Science Journal, Apr. 1994, Taiwan (Abstract).

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