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Description
The analog electronics for the Beam Loss Monitoring (BLM) system in the superconducting section of CSNS II is mainly used for signal conditioning of the output signals from BLM beam loss detectors. For the BLM electronics of CSNS I, a single-channel transimpedance circuit was designed. The overall response time of the detector, transmission cable, and electronics is approximately 150 μs, with a focus on high-sensitivity design, which fails to meet the 10 μs response time requirement for machine protection in the superconducting section of CSNS II. Referring to the design of the LHC BLM electronics, a Charge-to-Frequency Conversion (CFC) circuit has been developed to split the charge generated by beam loss ionization into cumulative charge packets Qt with a fixed time interval T. Machine Protection System (MPS) triggers are generated by comparing the count from a counter with a calibrated unit-time count, and a high-speed ADC samples the frequency waveform to calculate the beam loss value through algorithms.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted. |
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