XMASS

XMASS is a multipurpose physics experiment in Japan that monitors a large tank of xenon for flashes of light that might be caused by hypothetical dark matter particles.[1] In addition to searching for dark matter, XMASS is also studying neutrinoless double beta decay and solar neutrinos.

Its results have not confirmed the annual variation seen in some earlier experiments.[2]

History

Construction started in April 2007. The detector was completed in September 2010. Commissioning run was conducted between October 2010 and June 2012. Since November 2013, the detector has been taking scientific data. The detector is sometimes called XMASS-I, as it is planned to be superseded by an upgrade called XMASS-1.5 (a 5 ton detector) and eventually XMASS-II (24 ton detector).

As of 2018, the experiment continues.

Detector

The detector is located 1000m underground in the Kamioka Observatory in Japan. It contains about 800 kg of liquid xenon.[3]

References

  1. ↑ XMASS overview
  2. ↑ XMASS continues dark matter debate. Oct 2015
  3. ↑ About XMASS : Detector


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