Speaker
Takeshi Toyama
(High Energy Accelerator Research Organization)
Description
The present BPMs of the J-PARC Main Ring have adopted mechanical relays in its processing circuits. Frequency range is limited less than 10 MHz by LPFs. Mechanical relay is chosen due to its good isolation. But the drawback is contact failures due to insulating materials after long suspension period of months. Methods of recovery and checking are reported. Recovery of contacts are performed with injecting dummy pulses. Contact is checked examining consistency comparing four independent position pairs (x, y) calculated from 3 electrodes out of four electrodes. The hermetically seal reed relays will be implemented in the new processing circuits under development.
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Primary author
Takeshi Toyama
(High Energy Accelerator Research Organization)
Co-authors
Kenichirou Satou
(High Energy Accelerator Research Organization)
Shuichiro Hatakeyama
(Japan Atomic Energy Agency)
