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The APV25 readout ASIC, developed for the CMS silicon tracker and used in a number of other experiments, has been chosen as the readout technology for the HPS tracking and vertexing system. In order to jump start the APV25 DAQ development for HPS, we have borrowed an APV25 test stand from the CMS group at UCSB and will assemble it in our laboratory at SLAC. The first task is to complete the set SLAC is currently commissioning the prototype DAQ for the HPS Test Run, to occur next Spring, using CMS silicon modules. Within the next several weeks, we will also be prototyping the first silicon modules for HPS and beginning to exercise them with the rest of the DAQ for the test run. There are a large number of projects for students, from helping assemble prototype modules in the cleanroom, to debugging the DAQ, to testing HPS modules in order to benchmark and optimize their performance for the test run.

For an interested student with the required skills, participation in these projects has the potential to evolve into collaboration in the HPS Test Run up and programming of the test stand and begin taking data with spare CMS tracker modules to gain some experience in operating the DAQ and analyzing APV25 data. As the project progresses over the coming months, we will begin swapping in our own detector modules and DAQ components, evolving the test stand into a prototype of the full HPS DAQ. A snapshot of this DAQ will be used for planned test beam running at JLab in Spring 2011.

Please contact Tim Nelson for more information regarding this project.