Commissioning Procedure

Following is the list of major steps to bring the chamber into working condition:

1. Check gas system for correct setting of pressure and flow rate. Flush working gas into the chamber for at least several days to drive out air and moisture.

2. Apply HV up to setting point (currently 1970 V). Monitor leakage current at the same time.

3. Turn on threshold voltage and LV power for the preamp cards. The threshold voltage supply will be located inside the eletronic room of the counting house.

4. Taking some data to check the tracking efficiency and wire map, drift time and tracking residue histograms. Ajusting the drift velocity and plane position offset parameters if necessary. Refer to section 5:Traking Parameters.