Measuring the attenuation length of water in the CHIPS-M water Cherenkov detector

F. Amat, P. Bizouard, J. Bryant,T. J. Carroll,S. De Rijck,S. Germani,T. Joyce, B. Kriesten,M. L. Marshak,J. R. Meier,J. K. Nelson,A. Perch, M. M. Pfützner,R. Salazar,J. Thomas, J. Trokan-Tenorio,P. Vahle, R. Wade,C. Wendt,L. Whitehead, M. Whitney

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2017）

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Abstract

The water at the proposed site of the CHIPS water Cherenkov detector has been studied to measure its attenuation length for Cherenkov light as a function of filtering time. A scaled model of the CHIPS detector filled with water from the Wentworth 2W pit, proposed site of the CHIPS deployment, in conjunction with a 3.2m vertical column filled with this water, was used to study the transmission of 405nm laser light. Results consistent with attenuation lengths of up to 100m were observed for this wavelength with filtration and UV sterilization alone.

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Key words

Water,Attenuation,Neutrino,Cherenkov,Detector,Filtration,Absorption

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