Speaker
Masaki Tejima
(KEK)
Description
Beam position monitoring is one of most fundamental diagnostic tool in accelerator. To keep good performance of the BPM system, the beam-based alignment method is developed and used for more precise BPM alignment and keeping the performance. The signal from BPM is transfer by coaxial cable, and processed by signal processing circuit. The beam position is calculating from the relative ratio between the 4 intensities from the BPM head. The characteristic of circuit gain is calibrated in the beginning by using the test bench. But this calibration will be changed with passing year. To escape from this problem, a same kind of calibration for the gain as like as beam-based alignment is key issue to maintain a good performance of the BPM system. For this propose, a beam-based gain calibration method is developed and used in the KEK. The both of beam-based alignment method and beam based gain calibration method present using concrete examples.
Author
Masaki Tejima
(KEK)