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- V. Alferov, A. I. Ageev, A. Bakay, V. Fedorchenko, A. Kholkin, V. Krendelev, A. Lutchev, D. Vasiliev
IHEP Protvino, Protvino, Moscow Region
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A cryogenic complex has been built at IHEP to provide liquid helium and nitrogen for the RF-separator of kaons. About 500 analog parameters and 300 digital signals have to be measured, tens of commands generated, and 20 closed loops activated. On a lower level of the control system there are 90 home made equipment controllers, based on Analog Device and Atmel programmable devices. They provide data acquisition, calculation of operating parameters, and generation of digital and 4-20 mA analog commands. Equipment controllers are connected to four personal computers (PC) by means of CAN field buses. The PCs in turn are connected by a dedicated Ethernet network. LabVIEW based software for control and monitoring of the cryogenic complex has been designed and developed. The paper describes the features and present status of the control electronics, firmware and software.
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