The COMPASS experiment at CERN will use a new large acceptance superconducting magnet. A quench acquisition system and a slow control system for field rotation have been developed. In term of hardware, the acquisition system is done with an off-the-shelf modern VME64x solution, whereas the slow control system reuses a 12 years old VME configuration coming from the former SMC experiment. The software is based on EPICS with a dedicated development concerning quench acquisition (32 analog and 64 binary inputs permanently sampled at 10kHz in a circular buffer of 100sec duration) and field rotation (complex procedure involving the smooth correlated modification of 34 field values). Standard EPICS supervision applications and a dedicated tool for visualization of quench data run on a Linux PC. This system will be commissioned during the second half of 2005 and, then, installed on the experiment at CERN. |
