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EXO-200 Detector
EXO-200 Design
Data from the Detector
WIPP
EXO-200 Veto Counter
Barium Tagging in Gas
Barium Ion Grabbing
Moving to WIPP
Ribbon Cutting at WIPP
Miscellaneous
EXO-200 Detector
The vessel, during electron beam welding
One half of the TPC in the clean room, during constructrion.
Inserting the TPC into the cryostat.
Commissioning the cryostat.
The "back" of the readout of the TPC showing the completed APD readout system.
The tubing to guide calibration sources is installed in the cryostat.
The TPC in the vessel during construction in the clean room.
Installing the resistor chain that steps down the voltage along the TPC.
The class-100 clean room the cryostat is in.
Readout wires and APDs.
The readout of 7 apds uses as "spider".
The cabling to read out the TPC
EXO-200 Design
The inside of the TPC vessel.
Side view of cryostat.
Cross section of cryostat.
The end of the vessel.
The idea of a TPC.
The design of the cleanroom.
Data from the Detector
The spectrum showing the 2 neutrino decay mode of Xe-136
A muon traverses the EXO-200 TPC
EXO-200 at WIPP
Clean rooms at WIPP.
The TPC in a protective box, about to enter the clean rooms at WIPP.
Even more stuff at WIPP.
EXO Collaborators at WIPP, getting their miner certification.
EXO collaborators take a 40 hour miner training class.
Offices and machining equipment are in containers in the drift
WIPP is located about 30 miles from Carlsbad, New Mexico.
EXO collaborators take the mine elevator down.
EXO-200 Veto Counter
Installing Veto panels at WIPP.
Installing Veto panels at WIPP.
Installing Veto panels at WIPP.
Running wires for the veto panels.
Testing the muon veto system.
Testing the muon veto system.
Barium Tagging in Gas
Chamber at Carleton for studying energy resolution in gaseous Xenon.
Chamber for barium ion spectroscopy in gas
Barium ions are generated through a spark gap.
The horizontal band is barium ions that are fluorescing under a 439.5nm laser light at ~25 torr of argon gas.
The applied red filter shows that the fluorescence contains both wavelengths from the two transitions.
Barium Ion Grabbing
RIS Laser
Lasers for barium ion spectroscopy
Linear trap for barium ion spectroscopy.
Trapping area of electrodes.
PhD Student Matt Green works on the barium trap.
We are able to count the number of Barium ions in the trap.
A sensor for the end of our cryo-tip for measuring xenon ice thickness.
Diagram of how the trap works.
Moving to WIPP
Our experiment takes place in 6 clean room modules.
The clean rooms were in End Station III at Stanford until summer 2007.
The 6 clean room module were loaded on trucks to be driven to WIPP.
WIPP's capability of dealing with shielded radioactive waste meant handling our cleanrooms wasn't impossible.
The cleanroom modules were transported down the waste hoist with less than an inch of clearance on each side.
A large forklift was able to move the cleanrooms to our drift.
At WIPP there was an empty drift waiting for all of the clean room modules to arrive.
Ribbon Cutting at WIPP
Group visiting WIPP for ribbon cutting ceremony.
EXO principal invesitagator Giorgio Gratta, DOE Carlsbad Field Office Manager Dr. David Moody, and Senator Pete Domenici say some words before the ribbon cutting.
The ribbon is cut, officially opening EXO. Cutting participants include (L to R) Representative John Heaton, DOE Carlsbad Field Office Manager Dr. David Moody, Senator Pete Domenici, Carlsbad Mayor Bob Forrest, NM State Senator Vernon Asbill, and EXO PI Giorgio Gratta.
Prof. Giorgio Gratta and Senator Pete Domenici celebrate the successful beginning of EXO.
Dr. Lisa Kaufman exhibiting EXO's 200 kg of enriched Xenon to Jim Whitmore of the NSF and Howard Nicholson and the DOE Office of Science.
Graduate student Nicole Ackermans explains the EXO cryostat to Jim Whitemore, NSF; Joe Epstein, former general manager of WIPP management contractor, Washington TRU Solutions; Dr. Fred Yarger, Chief scientist and Director, New Mexico Center for Energy Policy, New Mexico Tech.
Miscellaneous
The largest stockpile of enriched isotope not for miliatary reasons - 200 kg of enriched Xenon.
The enriched Xenon comes from centrifuges in Russia. Make science, not war!
The collaboration at EXO Week 2008.
The collaboration at EXO Week 2009.
The collaboration at EXO Week Summer 2011.
The collaboration at EXO Week Spring 2012.
All materials need to be radiopure, so they are protected from cosmic rays. This is a bunker for copper.
We have our own machine shop underground so materials can be machined with minimal cosmic ray exposure.
All parts are thoroughly cleaned in a clean area before going into a clean room.
Clean room conditions are necessary for much of the work.
Measuring radioactivity is done many ways, including this Germanium detector at Alabama.
EXO collaborators after finishing stacking the lead at WIPP.