Two crystal growth furnaces.
Majorana researchers prepare the Majorana Module before it is closed and inserted into the shield
UNC researcher finishes the installation of HPGe detector strings into a Module. (Only firefox respects EXIF ration information in the image. Chrome cannot handle it correctly at this moment.)
Majorana Researcher inspects the MJD Data-acqusition system
Majorana Researchers prepare to perform the pre-installation test of a detector string.
A prototype Majorana module is being used for testing and R&D at UNC.
The cryogenics and vacuums systems at UNC.
The prototype module and supporting system such as a glove box,electronics, cryogenics, at UNC.
A typical Majorana detector string with one Natural detector on the top and multiple enriched detectors below.
The Max-Plank-Institute for physics operates three facilities to investigate germanium detectors:
Galatea is designed to allow detector scans with alpha, beta and gamma sources. A system of three stages is located inside a vacuum tank. The infrared shield of the detector has slits along which the collimated sources can be moved. As the infrared shield can be rotated, complete mantle scans are possible. Currently, work is ongoing to fully automate Galatea.
Galatea is mainly used to study surface events.
K2 is designed to allow detector scans with gamma sources. A system of three stages surrounding a temperature controlled vacuum cryostat makes complete mantle scans possible. The system is fully automated. Currently, work is ongoing to upgrade K2 with a Compton camera to allow for 3d scans.
K2 is mainly used to study drift paths patterns and the temperature dependence of pulse shapes.
Gerdalinchen II features a small cryogentic vessel which can be filled with liquid argon or nitrogen. Germanium detectors can be submerged in a controlled way avoiding icing.
Gerdalinchen II is mainly used to study the behaviour of detectors when directly submerged in cryo-liquid.