Low background Screening and Prototyping Facility at the Soudan Underground Lab 40’ x 35’ x 100’ cavern surrounded by a 99% efficient active muon veto SOLO HPGe Jim Reeves: Cu Electroforming SBIR + Cu screening detector (microBq/kg) Diode M (35%) Twin (75%) UF detector (100%)

Low background Screening and Prototyping Facility at the Soudan Underground Lab CDMS offices CDMS Aux Clean Room BFand SiLi detector Veto shield repaired last summer DAQ: location & time stamp for each muon

Four HP Ge detectors for gamma screening. Two in existing lead-shielded SOLO facility (Brown, PNNL) Third from U. Florida startup, 4 th Clover Well Detector (NSF MRI) Two alpha/beta screeners (via alternate funding) neon gas MWPC (Caltech, CWRU, FNAL) triggered expansion cloud chamber (UCSB, UMinn) Underground electroforming facility to make high purity copper (Reeves & Sons via awarded SBIR) Ge Detector fabrication (pending SBIR with Princeton Gamma Tech) Clean Machine shop Water tank with multiple top-loading ports in clean room on top Multipurpose clean room with shielded bays for prototypes Radon-scrubbing for all clean rooms Full Proposal includes the following features

Ante- room Multi- purpose clean room Clean room over tank Water ports with crane Electro form 40 ft Upper mezzanine above tank top User shielding Clean room over tank anteroom Clean room Water tank Shielded bays mezzanine anteroom radon scrubbing plenum. stairs current mezzanine Muon veto shield 100 ft Drawings and Design Consultation: Short Elliott Henderson Engineering, Inc

Medtronics “suitcase” experiment (soft memory errors) COUPP dark matter prototype (J. Collar) Copper electroforming (Reeves: SBIR Phase I & II) But we are open for business right now. see Procedure: Fill out an Experimental Planning Form Fee structure is established with ESO Signers of EPS so far…

Experimental Planning Statement for the Low Background Counting Facility A statement with the information detailed below, together with the signature sheet, must be submitted to the Soudan Underground Lab Manager before any experiment can be approved for installation in the Low Background Counting Facility. This will ensure that any new experiment does not interfere with either the of the two existing large experiments or with public tours, as well as reviewing safety and code-related issues. 1. Project Title and Description, incl. list of collaborators, institutions, and funding sources. 2. Experiment Area and Infrastructure Needs. This section should include physical area needed, both underground and on the surface, connections needed between surface and underground installations, electrical power needs, LAN bandwidth, and any special air handling requirements. There should also be list of number phone or fax lines needed. Depending on the area needed or type of the experiment, are there additional fire or life safety infrastructures needed? 3. Project Schedule Schedule should contain any construction period needed for infrastructure, detector assembly, operation period and removal of experiment. An estimate of access (and access schedule, including on-call emergency access) should be included such that hoist costs directly related to the experiment can be properly calculated. A description of the load size and weight of the cage is available. 4. Hazard Analyzes A complete list materials to be brought underground and waste products to be removed. Any possible physical hazards should be listed. All materials should have MSDS sheets appended to this document. Any material handling issues should also be noted. Assessment of this issues, especially the ones that fall under the safety category, need to be addressed by both the U of M and DNR who are responsible for site safety. 5. Minecrew Labor An estimate of minecrew labor needed should include any construction or operation manpower requirements. As a general rule, all non carry-on equipment must be moved underground by the minecrew. A trained and designated cage rider must be present underground at all time if access for non-standard shifts is needed. 6. Surface Space Required List any space usage needed in Surface Building for staging or remote operation, including control rooms and computers (there is a fiber optic connection to the underground lab). Also list any space required that cannot be accommodated inside the surface building for parking, staging or general material storage.

Project Title:____________________________________________________ Prof. Earl Peterson ______________________________________ University of Minnesota Soudan Underground Lab Director Mr. William Miller ______________________________________ University of Minnesota Soudan Underground Lab Manager Mr. Paul Wannarka ______________________________________ Department of Natural Resources Soudan Underground Mine State Park Manager Dr. Regina Rameika ______________________________________ Fermi National Laboratory MINOS Operations Manager Dr. Dan Bauer ___________________________________________ Fermi National Laboratory CDMS II Project Manager Prof. Priscilla Cushman ____________________________________ University of Minnesota Manager of the Low Background Counting Facility