The research on anti-interference techniques in AMS-C power system

AMS-C system is the ground version of AMS-01 system, which is composed of Silicon Tracker detector (TRK), Time of Flight detector (ToF) and Magnet. The total system is finished in March 2005, and installed in June 2005. However, static inductance, source hi-frequency pulse, source harmonic noise and strong electric magnetic interference influence strongly the electronic devices of AMS-C in our test process. Some basic principles of the good grounding; shielding and power distribution practices are applied to limit peak or surge interference. Then isolation transformer and filter are considered as an ulterior step to increase the capability of anti-interference. By these composite measures, the anti-interference ability of system is improved and the operation requirement reached. The improved system now can collect favorable particle events and reach anticipant purpose. The first batch of data collected by the AMS-C system has been sent to our overseas AMS partner research institutions and has proven effective and reliable.