The radon monitoring system in Daya Bay Reactor Neutrino Experiment

详细信息    查看全文

• 作者：M.C. Chu^a ; K.K. Kwan^a ; M.W. Kwok^a ; T. Kwok^b ; ^{tnkwok@hku.hk" class="auth_mail" title="E-mail the corresponding author} ; J.K.C. Leung^b ; K.Y. Leung^b ; Y.C. Lin^a ; ^b ; K.B. Luk^c ; ^d ; C.S.J. Pun^b
• 关键词：Radon ; Rn ; Daya Bay
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：808
• 期：Complete
• 页码：156-164
• 全文大小：2319 K

文摘

We developed a highly sensitive, reliable and portable automatic system (H³) to monitor the radon concentration of the underground experimental halls of the Daya Bay Reactor Neutrino Experiment. H³ is able to measure radon concentration with a statistical error less than 10% in a 1-h measurement of dehumidified air (R.H. 5% at 25 °C) with radon concentration as low as 50 Bq/m³. This is achieved by using a large radon progeny collection chamber, semiconductor α-particle detector with high energy resolution, improved electronics and software. The integrated radon monitoring system is highly customizable to operate in different run modes at scheduled times and can be controlled remotely to sample radon in ambient air or in water from the water pools where the antineutrino detectors are being housed. The radon monitoring system has been running in the three experimental halls of the Daya Bay Reactor Neutrino Experiment since November 2013.