1.) Simulation: Electric field map complete. Neven will look into pulling ionization routines out of Garfield.
2.) GEM Power supply: Current Monitor circuit in Version 1 stage. Switch installed to change between monitoring GEM foils and Ionization chamber cathode. The board has been tested with a power supply but hasn't been installed as part of the detector. Analog readout on order, currently using a borrowed one.
3.) Readout: Two
Wire bonding machines have arrived. We will use the
Wedge bonding tool
to make connections between the Helix board pad to the
pad adapter which we
disigned and had produce by Advanced Circuits.
Our practice bonds are almost as good as the standard
Chips have arrived to convert TTL pulses to LVDS
signals to drive the Helix chips. We are trying to find a
fast (20-100 MHz) TTL pulser to use.
4.) Detector Design: Currently writing contract to hire Ph.D. engineering student to design rotator system. Basic design is to procure a bearing which will mount to the rear of the first stage of the primary collimator.
5.) Test Apparatus We have procured 1mm thick plastic to use for mounting GEM foils. We have also acquired several copper cladded kapton samples from Dupont which we will test. We are designing a test involving the gasket and glue materials we found from a CERN study on outgasing and aging.
