Abstract:
A new method for crossing transition at the Fermilab Main Ring has been developed. Near transition a third harmonic component is added to the fundamental RF voltage produ...Show MoreMetadata
Abstract:
A new method for crossing transition at the Fermilab Main Ring has been developed. Near transition a third harmonic component is added to the fundamental RF voltage producing a flattened RF waveform. To generate this waveform required the development of a third harmonic system consisting of a 159 MHz cavity, a perpendicularly biased tuner,and a 10 kW power amplifier. The cavity is a modified CERN SPS 200 MHz cavity whose frequency was lowered to 159 MHz by inserting two sleeves at the cavity gap. This cavity is electrically tuned over a 60 kHz range by using an orthogonally biased Iron-Yttrium-Garnet ferrite tuner. The power amplifier is a grid driven tetrode that has a 3/4 /spl lambda/ anode resonator and produces a RF cavity gap voltage of greater than 300 kV. The power amplifier drives the cavity by way of a coupling loop. An overview of this high level RF system and the resulting waveform is given.<>
Date of Conference: 17-20 May 1993
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-1203-1
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2.
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C. Bhat, J. Dey, J. Griffin, I. Kourbanis, J. Maclachlan, M. Martens, et al., "Operational Experience with Third Harmonic RF for Improved Beam Acceleration Through Transition in The Fermilab Main Ring".
