BEXCO - Room F(201/202/203/204)
[CRD023] Leak test for liner of muon detector of LHAASO
Muon detector (MD) is water Cherenkov detector in Large High Altitude Air Shower Observatory (LHAASO) experiment. The liner is applied to seal 44 ton ultra-pure water, which is the major detection media of MD. The liner must protect the water from contamination and inhibit bacteriological activities. The MD conducts a long duration mission (~20 years), so any significant leak would have severe consequences. The purpose of this paper is to introduce leak test for liner of MD. A new method of SF6 tracer gas leak checking is proposed by using a SF6 quantitative determination instrument with a high resolution (0.01ppm). This method has quick response time and high sensitivity to the small hole (diameter<0.2mm).