Distributed Can-Bus Based Beam Diagnostic System for Pulse Race-Track Microtron

Details Distributed Can-Bus Based Beam Diagnostic System for Pulse Race-Track Microtron Distributed Can-Bus Based Beam Diagnostic System for Pulse Race-Track Microtron

2001-11-27

arxiv.org/abs/physics/0111197v2

eConf C011127 (2001) FRAT003

Physics

Accelerator Physics

Oral presentation on ICALEPCS'2001,San Jose, 27-30 November, 2001, (FRAT003) 3 pages, pdf

Scientific paper

Very compact 70 MeV pulse race-track microtron is under construction now. To acquire outputs of beam-current transformers on every orbit and pulses of high voltage and RF field a distributed multi-channel beam diagnostic system was developed. Each acquisition controller consists of four fast differential amplifiers and one DSP-based micro-controller with on-chip ADC and CAN-bus controller. Each amplifier is coupled with beam-current transformer and has bandwidth of up to 150MHz and gain of up to 10. One of four channels is acquired during a measurement cycle. Another channel could be selected between two following pulses. All the controllers are connected via optically coupled CAN-bus with a host diskless PC running under Linux with the RTLinux extension. Dedicated software of the system consists of low level acquisition software for DSP, network software for controllers and host PC, application software for PC to present date for operator and control system. Standard CAN application layers were considered but refused because of the closed character of the whole system and centralised synchronisation of the whole system. Dedicated software of the system consists from low level acquisition software for DSP, network software for controllers and host PC, application software for PC to present date for operator and control system. Standard CAN application layers were considered but refused because of closed character of the whole system and centralised synchronisation of the whole system.

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