Author/Authors :
Akerib، نويسنده , , D.S. and Bai، نويسنده , , X. and Bedikian، نويسنده , , S. and Bernstein، نويسنده , , A. and Bolozdynya، نويسنده , , A. and Bradley، نويسنده , , A. and Cahn، نويسنده , , S.B. and Carr، نويسنده , , D. and Chapman، نويسنده , , J.J. and Clark، نويسنده , , K. and Classen، نويسنده , , T. and Curioni، نويسنده , , A. and Dahl، نويسنده , , C.E. and Dazeley، نويسنده , , S. and de Viveiros، نويسنده , , L. and Dragowsky، نويسنده , , M.، نويسنده ,
Abstract :
The LUX (large underground xenon) detector is a two-phase xenon time projection chamber (TPC) designed to search for WIMP–nucleon dark matter interactions. As with all noble element detectors, continuous purification of the detector medium is essential to produce a large ( > 1 ms ) electron lifetime; this is necessary for efficient measurement of the electron signal which in turn is essential for achieving robust discrimination of signal from background events. In this paper, we describe the development of a novel purification system deployed in a prototype detector. The results from the operation of this prototype indicated heat exchange with an efficiency above 94% up to a flow rate of 42 slpm, allowing for an electron drift length greater than 1 m to be achieved in approximately 2 days and sustained for the duration of the testing period.
Keywords :
Large detector systems for particle and astroparticle physics , Noble-liquid detectors , Charge transport and multiplication in liquid media
