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Source publication
The 28 MHz accelerating system consists of a quarter wave cavity
driven by an inductively coupled 100 kW tetrode amplifer and 1 kW solid
state driver amplifer. 40 dB of RF feedback closed around the cavity and
amplifiers reduces small perturbations within the loop by a factor of
100, and reduces the time required to shift the phase at transition by...
Context in source publication
Context 1
... loops are installed through the enwall of the cavity and extend up through the cylindrical wall where they couple to a 5 th order ~ Chebyschev high pass filter 3 , with a cut-off frequency of 67 MHz. The schematic is shown in figure 3. The first capacitor, which is in series with the loop inductance, is reduced to below that which would cause voltage breakdown in air. ...
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Citations
In the first part some knowledge about the coherent instabilities in cyclic accelerators and storage rings necessary for the analysis of the collective effects in the heavy ion collider NICA is given. The second part discusses the possibilities for arising of coherent instabilities in the booster and in the collider of the NICA complex. Both coupling impedances and instability thresholds and growth rates have been estimated for single and coupled bunches. Parameters of the beam feedback system for damping of the instabilities have been analyzed. The investigation has been performed at the Veksler and Baldin Laboratory of High Energy Physics, JINR.
