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The heavy water is contained inside a 5-cm thick transparent acrylic vessel, submerged in light water. The vessel is
suspended from ropes so that the PMTs are unobstructed and to provide damping in the case of rock bursts or other ground movements. The vessel is a 12-m diameter sphere with a 8-m tall neck section (2-m diameter) to
provide access for filtering pipes, calibration devices etc. |
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