Home-Made Power Supply Controllers in Trial Operation on the Beijing Electron-Positron Collider

The power supply controller/interface (PSC/PSI) systems developed and manufactured by researchers of the CAS Institute of High Energy Physics (IHEP) have been in smooth operation on the transport line for the on-going renovation of the Beijing Electron-Positron Collider (BEPCII) since Feb. 20. The tests show that their performance is both stable and satisfactory.

The PSC/PSI, a very simple integrated system that provides precise control for analog or digitally controlled power supplies, is a very important component of the BEPCII. One PSC master controls up to six individual PSI units (one PSI per power supply). Until recently, the PSC/PSIs for all the 360 or so magnet power supplies in the storage rings and one superconducting magnet power supply at the upgraded Beijing Spectrometer (BESII) were imported from the United States.

To cut the cost and facilitate the afterward maintenance, IHEP researchers decided to develop their own power supply control systems. So far they have developed and manufactured nine PSC units and 38 PSI units for the operation of B and Q magnets in the transport line. The on-site operation shows that the home-made apparatuses are up to the standard of the imported ones.

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