Title :
Resonant BPM for continuous tune measurement in RHIC
Author :
Kesselman, M. ; Cameron, P. ; Cupolo, J.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
A movable Beam Position Monitor (BPM) using shorted stripline Pick-Up Electrode (PUE) elements has been resonated using matching stub techniques to achieve a relatively high Q resonance at about 230MHz. This PUE has been used in a feasibility study of phase-locked-loop tune measurement, using a lock-in amplifier and variable frequency generator to continuously track betatron tune in RHIC, as well as to observe Schottky signals of the Gold beam. The approach to providing a high Q PUE for difference mode signals, simulation studies, and the results of initial tests arewill be presented
Keywords :
colliding beam accelerators; ion accelerators; particle beam diagnostics; phase locked loops; storage rings; variable-frequency oscillators; 230 MHz; RHIC; Schottky signals; betatron tune; difference mode signals; high Q resonance; lock-in amplifier; matching stub techniques; movable beam position monitor; phase-locked-loop tune measurement; shorted stripline pick-up electrode elements; variable frequency generator; Amplifiers; Electrodes; Frequency measurement; Gold; Monitoring; Phase locked loops; Phase measurement; Resonance; Signal generators; Stripline;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986679
