University of Minnesota CDMS Collaboration

Task Summary

DAQ (Data Acquisition)

As a collaboration, we helped set-up and commission the DAQ system at the Soudan mine. We have also contributed substantially to the coding of the event builder, which converts the detector signals into data files. Members also focused on the job and user ends of DAQ, writing code for the monitoring system. Currently, we oversee the maintenance of DAQ and related areas.


The University of Minnesota CDMS collaboration has a primary role at the Soudan. Throughout 2003, we were represented on-site 100% of the year. During the current year, we have had on-site representation 80% of the time.

Detector Characterization

Our group containes a trained user in RBS (Rutherford Back Scattering) and PIXE (Particle Induced X-Ray Emission) procedures. The detector characterization tests are run at the Ion Beam Facility in the Characterization sector of the University of Minnesota's Shepard Labs. We use test wafers (model of the top layer of the detectors) to look for possible contamination that could lead to beta and gamma background.

Monte Carlo

Our group entered the detailed geometry of the Soudan Experimental set-up into the CDMS GEANT 4.5 simulation database. We also ran tests comparing GEANT's simulations of high energy muon neutron production to those of FLUKA. Using GEANT 4.5, we have run simulations of these cosmogenic muon showers in the rock as well as studied these cosmogenic showers in the veto.


Our collaboration defined cuts for the final SUF (Stanford Underground Facility) run. We have also determined cuts for the CDMS Soudan Run 118 (Oct. 2003-Jan. 2004) and continue to make substantial analysis contributions to the current Soudan 119 run (March 2004).

Created April 11, 2004

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