Fixed frequency cyclotron operation with a regulator for dee voltage stabilization
A severe time modulation of the beam from a 152 cm cyclotron was found to be caused by dee voltage fluctuations. To eliminate this difficulty, a series-type regulator has been constructed. The regulator controls the oscillator plate power voltage in order to maintain a constant and ripple-free potential on one dee. Under average conditions of use the dee voltage is constant to ± 0.15%. In addition to improving the beam time stability, the regulator introduces several unexpected features of cyclotron performance among which are the following: The deflected beam goes through pronounced peaks and valleys as the dee voltage is varied. The deflection efficiency is greater when the dee voltage is set on a beam maximum. Stability of the cyclotron against sparking is improved. Finally, the focused beam image in a scattering chamber remote from the cyclotron is substantially smaller showing that the beam energy spread is less.
- Research Organization:
- Univ. of Washington, Seattle
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-015102
- OSTI ID:
- 4042679
- Journal Information:
- Nuclear Instruments and Methods, Vol. 10, Issue C; Other Information: Orig. Receipt Date: 31-DEC-61; ISSN 0029-554X
- Publisher:
- Elsevier
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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