Electric lamp and discharge devices – With temperature modifier – For lead-in-seal or stem protection
Patent
1989-07-18
1990-07-24
DeMeo, Palmer C.
Electric lamp and discharge devices
With temperature modifier
For lead-in-seal or stem protection
313 62, 335216, H05H 1300, H05H 1306
Patent
active
049437810
ABSTRACT:
A cyclotron having a cylindrical superconducting magnet which generates an axial magnetic field and has a central opening or chamber of substantially circular cross-section. The accelerating beam space is located in this chamber lying normal to the axis of the magnetic field. The azimuth variation of magnetic field as well as the isochronous radial variation of magnetic field required to control the orbiting of the ion beam in the beam space, are provided by ferro-magnetic pole pieces located in the axial chamber, which interact with the magnetic field to cause the required field variations. Interposed between the pole pieces are resonant frequency members which provide the radio frequency energization to accelerate the ion beam around the beam space. Having the whole of the central chamber free for top and bottom access enables the pole pieces to be given an efficient design shape. Also, the radio frequency members are able to be interposed between the pole pieces and are not restricted as to axial length and so can be made a very efficient length, such as quarter wave length resonators. The radio frequency members have axially extending hollow interiors which open into the beam space and this enables vacuum pumping to communicate through these interiors thus allowing very efficient pumping of the beam space. There is no iron yoke for the magnet and the weight and size are consequently much reduced and the cyclotron is highly transportable.
REFERENCES:
patent: 3624527 (1971-11-01), Hudson
patent: 3794927 (1974-02-01), Fleischer et al.
patent: 3868522 (1975-02-01), Bigham et al.
patent: 3925676 (1975-12-01), Bigham et al.
patent: 4641104 (1987-02-01), Blosser et al.
IEEE Transactions on Magnetics, vol. MAG-11, No. 2, Mar. 1975, N.Y., Schneider et al., "Superconducting Cyclotrons," pp. 443-446.
"The JINR U-400 Isochronous Heavy Ion Cyclotron", by B. N. Markov, IEEE Transactions on Nuclear Science, vol. NS-24, No. 3, Jun. 1977, pp. 1215-1217.
"Extraction of a Beam . . . Isochronous Heavy-Ion Cyclotron . . . ," by I. A. Shelaev et al., Instrum. & Exp. Tech. (U.S.A.), No. 3, May-Jun. 1970, pp. 689-692.
Finlan Martin F.
Wilson Martin N.
Amersham International plc
DeMeo Palmer C.
Oxford Instruments Ltd.
LandOfFree
Cyclotron with yokeless superconducting magnet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cyclotron with yokeless superconducting magnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cyclotron with yokeless superconducting magnet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1269539