Dual channel FMC High-Voltage Supply

The Beam Loss Monitoring (BLM) detectors and electronics are installed in the CERN accelerators to provide measurements of the beam loss and to protect from excessive losses. The majority of the BLM detector types require voltage biasing up to 2000 VDC with a possibility to generate patterns to verify the connection chain from the detectors to the front-ends. Currently, the power supply solution consists of Components Off-The-Shelf (COTS) large format power supplies with additional custom electronics and various interconnections to provide monitoring and remote control. For this reason, a market search has been done to identify a high reliability module suitable for dedicated BLM installations composed of a few detectors. The outcome of this market survey has justified the need to design a low-cost custom board, compatible with the CERN infrastructure and different detector types, as well as easily customizable to cover various installation architectures and needed voltage ranges. The main characteristics of the developed board are: autonomy and full remote control; common hardware for different applications with a change of the DC\DC converter and a few components; smaller size than what is currently used as High-Voltage (HV) power supplies; multiple different high voltage or low voltage outputs for specific applications with the default design consisting of two positive high voltage outputs and one low voltage output; µV voltage sensing and mA current sensing capabilities; protection against overvoltage.