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An Array of low-background He-3 proportional counters for the Sudbury neutrino observatory.
journal contribution
posted on 2023-06-08, 08:58 authored by JF Amsbaugh, JM Anaya, JB Banar, Simon PeetersSimon Peeters, et alAn array of Neutral-Current Detectors (NCDs) has been built in order to make a unique measurement of the total active flux of solar neutrinos in the Sudbury Neutrino Observatory (SNO). Data in the third phase of the SNO experiment were collected between November 2004 and 2006, after the NCD array was added to improve the neutral-current sensitivity of the SNO detector. This array consisted of 36 strings of proportional counters filled with a mixture of He-3 and CF4 gas capable of detecting the neutrons liberated by the neutrino-deuteron neutral-current reaction in the D2O, and four strings filled with a mixture of He-4 and CF4 gas for background measurements. The proportional counter diameter is 5 cm. The total deployed array length was 398 m. The SNO NCD array is the lowest-radioactivity large array of proportional counters ever produced. This article describes the design, construction, deployment, and characterization of the NCD array, discusses the electronics and data acquisition system, and considers event signatures and backgrounds.
History
Publication status
- Published
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentISSN
0168-9002External DOI
Issue
3Volume
579Page range
1054-1080Pages
27.0Department affiliated with
- Physics and Astronomy Publications
Notes
Describes addition and running of a second detector to the SNO experiment. It is expected to significantly contribute to the most accurate measurement of the solar 8B neutrino flux. As neutron calibration analysis coordinator, I have directly contributed to the commissioning , running and understanding of this system.Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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