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A VARIABLE ENERGY SPIRAL RIDGE CYCLOTRON

Technical Report ·
OSTI ID:4167241
A spiral ridge cyclotron which can accelerate protons from 3.5 to 15 Mev, deuterons from 7 to 14 Mev. He/sup 3++/ from 11 to 37 Mev, and alpha particles from 15 to 27 Mev is described. The required magnetic field is obtained from four spiral shims and five correction coils placed on each of the pole faces of the magnet. The spiral shims produce a maximum rms flutter of 0.07 which provides sufficient vertical focusing beyond a radial distance 6 in. from the center of the cyclotron. The two innermost correction coils provide magnetic focusing up to 6 in. and the three outer coils build up the isochronous field. Focusing effects of slits. placed on the dee and the dummy dee in the path of the particles for the first four revolutions, are demonstrated. The machine can deliver 1 ma of proton beam at the extraction radius 18.5 in. (auth)
Research Organization:
Illinois. Univ., Urbana
NSA Number:
NSA-14-015359
OSTI ID:
4167241
Report Number(s):
NP-8623
Country of Publication:
Country unknown/Code not available
Language:
English

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