Title :
RHIC 28 MHz accelerating cavity system
Author :
Rose, J. ; Brennan, J.M. ; Campbell, A. ; Kwiatkowski, S. ; Pirkl, W. ; Ratti, A.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
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 a factor of 10, limited by the saturation of the drive chain. The cavity is tuned over a 200 kHz range by a mechanical tuner which varies the gap capacitance. Broadband HOM damping is provided by two orthogonal loop coupled high pass filters. Design parameters and commissioning results are presented
Keywords :
accelerator cavities; high-pass filters; ion accelerators; storage rings; tetrodes; 1 kW; 100 kW; 200 kHz; 28 MHz; 40 dB; RF feedback; RHIC 28 MHz accelerating cavity system; Relativistic Heavy Ion Collider; accelerating system; broadband HOM damping; inductively coupled tetrode amplifer; orthogonal loop coupled high pass filters; quarter wave cavity; solid state driver amplifer; Acceleration; Capacitance; Damping; Driver circuits; Feedback loop; Radio frequency; Radiofrequency amplifiers; Solid state circuits; State feedback; Tuners;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986493
