An Electron Ring Extraction Scheme from the Modified Betatron Accelerator
NAVAL RESEARCH LAB WASHINGTON DC
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This report, describes on an extraction scheme that is easily realizable and has the potential to lead to very high extraction efficiency. The proposed extraction scheme is based on the transformation of the circulating electron ring into a stationary helix, in the toroidal direction, by exciting the resonance that naturally exists for some specific values of the ratio of the vertical to toroidal magnetic field. Transformation of the ring into a helix is achieved with a localized vertical magnetic field disturbance that is generated by an agitator coil. As the minor radius of the helix increases with each passage through the gap of the agitator coil, the electrons eventually reach the extractor, which has the property that all the magnetic field components transverse to its axis are equal to zero. Thus, the electron ring unwinds into a straight beam. A technique is proposed for extracting the electron ring from the modified betatron accelerator. Basically, this technique consists of exciting the resonance that naturally exists for some specific values of the ratio of the vertical to toroidal magnetic field. Keywords Compact accelerators Modified betatron Extraction.
- Particle Accelerators