Qweak GEM installation log book
5/12/2010
Detector installation
The Qweak GEM detector has been installed in the doghouce in Hall-C and the HV was turned on. On the scope picture below is shown the GEM trigger out pulse, after it has been amplified and integrated with timing filter amplifier. The high voltage supply is placed in the doghouse with the other electronics.
Electronics
We have the NIM Bin with the following modules: Leading edge discriminator, timing filter amplifier(X2), Gumstix module.
Gas
The gas bottle filled with ArCO2 is placed outside the doghouse. We have two 90 ft shielded twisted ribbon cables next to region 1 area.
cables need to be routed about colimator 2.
5/13/2010
Met with Kelly Tremblay to discuss survey plans. Goal is to be ready for Qweak collaborators and survey crew to align detector on June 4. The "Fork" used to connect the GEM detector to the translator will be fiducialized for the laser survey system by mounting 4 targets on the fork. The request is to have the "Y" location surveyed in to 100 microns (this is essentially ) . We desire the X-location to be surveyed within 250 microns. The Z - location beam upstream/downstream is the least critical.
DAQ computer name is : cdaql6
R1 ROC name : QWROC11
Gumstix and I2C