Light Leak Detector for Liner Testing at The Pierre Auger Observatory

M. MELOCCHI, F. SUAREZ, M. VIDELA , B. GARCÍA, A. LUCERO, D ACIAR, L. FERRER, B. CIVIT, M. MURGO

Pierre Auger Technical Notes

Año: 2004 vol. 2004 p. 1 - 10

The Liner assembly for the “Production” of the Pierre Auger Observatory surface detectors is performed at the UTN facilities. Liners are cylindrical bags of 3.60 m diameter and 1.20m high. They are made of Tyvek fibrous polyolefin sheets laminated with black low-density polyethylene films. Six fill ports and three dome window/flanges assemblies are sealed at the top of the liner. In the window/flanges assembly three photo multipliers are mounted to monitor the tank. The fill ports allow for the filling and venting of the tank as well as providing an opening for LED flashers for calibration and initial testing. (Civit et al., 2003). Liners contain 12000 liters of ultra pure water inside the tank of the SDE detectors. These liners have been specially designed to fulfill all needs of the Cherenkov Effect (Warner, Harton, and Bauleo, 2002) Two kinds of tests are performed at the UTN site before sending the liners to Malargüe: The bubble and light tests. The Light Leak Detector (LLD) has been designed to simplify the light leak testing at the UTN facilities.bubble and light tests. The Light Leak Detector (LLD) has been designed to simplify the light leak testing at the UTN facilities.