Title :
A beam scraper using a linear motor
Author :
Beadle, E.R. ; Rodger, E.S. ; Thern, R.E.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
A beam scraper using a linear motor drive has been developed for use in the alternating gradient synchrotron (AGS) at Brookhaven National Laboratory. The device measures beam size by moving a target to a predetermined location and measuring the intercepted beam with nearby loss monitors or by noting the decrease in the circulating beam current. It has excellent vacuum characteristics, as the motor and sensor coils are outside the vacuum, coupled magnetically to the internal moving parts. No bellows or dynamic seals are required. The position-time profile is controlled by a closed-loop servo system which uses position feedback
Keywords :
beam handling equipment; beam handling techniques; particle accelerator accessories; synchrotrons; alternating gradient synchrotron; beam scraper; beam size; bellows; circulating beam current; closed-loop servo system; dynamic seals; linear motor; loss monitors; position feedback; position-time profile; sensor coils; vacuum characteristics; Coils; Current measurement; Laboratories; Loss measurement; Magnetic sensors; Motor drives; Sensor phenomena and characterization; Servomotors; Size measurement; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73484
