Title :
An ultra low noise AC beam transformer for deceleration and diagnostics of low intensity beams
Author :
Gonzalez, C. ; Pedersen, F.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
The design of a broad band ultra-low noise ferrite loaded AC beam transformer is presented. It is designed for use in the CERN Antiproton Decelerator (AD), where beams of a few 107 charges must be decelerated from 3.5 GeV/c to 100 MeV/c. It is used in the RF beam-phase loop, and for intensity and bunch shape measurements during deceleration. When the beam is debunched for cooling on magnetic flat tops, the pick-up is used for measurements of intensity and momentum distribution by means of longitudinal Schottky scans. When used as Schottky pick-up, the signal to noise ratio should be better by about 40 dB than the existing stripline based longitudinal Schottky pick-up. The integrated design of pick-up and associated low-noise amplifier is presented
Keywords :
accelerator RF systems; beam handling equipment; ferrite devices; particle beam bunching; particle beam diagnostics; proton accelerators; 100 MeV to 3.5 GeV; CERN Antiproton Decelerator; RF beam-phase loop; Schottky pickup; broad band ferrite loaded AC beam transformer; bunch shape measurements; intensity distribution; longitudinal Schottky scans; low intensity beam decelerator; low intensity beam diagnostics; low-noise amplifier; magnetic flat tops; momentum distribution; signal-noise ratio; ultralow noise AC beam transformer; Ceramics; Circuit noise; Current measurement; Ferrites; Impedance; Low-noise amplifiers; Noise figure; Radio frequency; Radiofrequency amplifiers; Resonance;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795736
