Rotatable superconducting cyclotron adapted for medical use

Details Rotatable superconducting cyclotron adapted for medical use Rotatable superconducting cyclotron adapted for medical use

1982-03-08

1985-03-26

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313 62, 2504923, H05H 1300

Patent

active

045076162

ABSTRACT:
A superconducting cyclotron (10) rotatable on a support structure (11) in an arc of about 180.degree. around a pivot axis (A--A) and particularly adapted for medical use is described. The rotatable support structure (13, 15) is balanced by being counterweighted (14) so as to allow rotation of the cyclotron and a beam (12), such as a subparticle (neutron) or atomic particle beam, from the cyclotron in the arc around a patient. Flexible hose (25) is moveably attached to the support structure for providing a liquified gas which is supercooled to near 0.degree. K. to an inlet means (122) to a chamber (105) around superconducting coils (101, 102). The liquid (34) level in the cyclotron is maintained approximately half full so that rotation of the support structure and cyclotron through the 180.degree. can be accomplished without spilling the liquid from the cyclotron. With the coils vertically oriented, each turn of the winding is approximately half immersed in liquid (34) and half exposed to cold gas and adequate cooling to maintain superconducting temperatures in the section of coil above the liquid level is provided by the combination of cold gas/vapor and by the conductive flow of heat along each turn of the winding from the half above the liquid to the half below.

REFERENCES:
patent: 4112306 (1978-09-01), Nunan

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