A scintillator purification system for a large scale solar neutrino experiment

Jay Burton Benziger; Michael Johnson; Frank Calaprice; M. Chen; N. Darnton; R. Loeser; R. B. Vogelaar

doi:10.1016/S0168-9002(98)00767-0

A scintillator purification system for a large scale solar neutrino experiment

Jay Burton Benziger, Michael Johnson, Frank Calaprice, M. Chen, N. Darnton, R. Loeser, R. B. Vogelaar

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

An on-line purification system for a large-scale low-background liquid scintillation detector has been tested with the 5 t liquid scintillation detector, the Counting Test Facility at Gran Sasso. Counter-current water extraction removes polar and charged impurities such as ions and metal salts. Vacuum distillation of the entire scintillator has been applied to remove both radioactive impurities and chemical impurities that affect the optical properties of the scintillator. Filtration with a 0.05 μm particulate filter removed suspended dust particles that may contain U, Th and K. Nitrogen stripping was employed to remove dissolved water and noble gases (e.g. ⁸⁵Kr) from the scintillator. The system has effectively reduced the internal back in the 5 t liquid scintillation detector from 470 ± 90 events/d to the detection limit of the detector (± 45 events/d) in the energy window 250 < E < 800 keV.

Original language	English (US)
Pages (from-to)	278-296
Number of pages	19
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	417
Issue number	2-3
DOIs	https://doi.org/10.1016/S0168-9002(98)00767-0
State	Published - Nov 11 1998

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

Keywords

Liquid scintillator
Radiopurity
Solar neutrino

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10.1016/S0168-9002(98)00767-0

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Benziger, J. B., Johnson, M., Calaprice, F., Chen, M., Darnton, N., Loeser, R., & Vogelaar, R. B. (1998). A scintillator purification system for a large scale solar neutrino experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 417(2-3), 278-296. https://doi.org/10.1016/S0168-9002(98)00767-0

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title = "A scintillator purification system for a large scale solar neutrino experiment",

abstract = "An on-line purification system for a large-scale low-background liquid scintillation detector has been tested with the 5 t liquid scintillation detector, the Counting Test Facility at Gran Sasso. Counter-current water extraction removes polar and charged impurities such as ions and metal salts. Vacuum distillation of the entire scintillator has been applied to remove both radioactive impurities and chemical impurities that affect the optical properties of the scintillator. Filtration with a 0.05 μm particulate filter removed suspended dust particles that may contain U, Th and K. Nitrogen stripping was employed to remove dissolved water and noble gases (e.g. 85Kr) from the scintillator. The system has effectively reduced the internal back in the 5 t liquid scintillation detector from 470 ± 90 events/d to the detection limit of the detector (± 45 events/d) in the energy window 250 < E < 800 keV.",

keywords = "Liquid scintillator, Radiopurity, Solar neutrino",

author = "Benziger, \{Jay Burton\} and Michael Johnson and Frank Calaprice and M. Chen and N. Darnton and R. Loeser and Vogelaar, \{R. B.\}",

note = "Funding Information: We thank for NSF (PHY-9313919) for their support of this work. We also thank the INFN for funding support of the hot oil and nitrogen systems. One of us (FPC) thanks the INFN for support during a sabbatical leave to help oversee the operation of the purification system. We finally thank the following people for their aid in data analysis: G. Almonti (for the 85 Kr analyses), L. Cadonati (for the radon analyses), C. Galbiati, S. Magni, E. Meroni, G. Ranucci, S. Schoenert and M. Lowry. ",

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doi = "10.1016/S0168-9002(98)00767-0",

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Benziger, JB, Johnson, M, Calaprice, F, Chen, M, Darnton, N, Loeser, R & Vogelaar, RB 1998, 'A scintillator purification system for a large scale solar neutrino experiment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 417, no. 2-3, pp. 278-296. https://doi.org/10.1016/S0168-9002(98)00767-0

A scintillator purification system for a large scale solar neutrino experiment. / Benziger, Jay Burton; Johnson, Michael; Calaprice, Frank et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 417, No. 2-3, 11.11.1998, p. 278-296.

Research output: Contribution to journal › Article › peer-review

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T1 - A scintillator purification system for a large scale solar neutrino experiment

AU - Benziger, Jay Burton

AU - Johnson, Michael

AU - Calaprice, Frank

AU - Chen, M.

AU - Darnton, N.

AU - Loeser, R.

AU - Vogelaar, R. B.

N1 - Funding Information: We thank for NSF (PHY-9313919) for their support of this work. We also thank the INFN for funding support of the hot oil and nitrogen systems. One of us (FPC) thanks the INFN for support during a sabbatical leave to help oversee the operation of the purification system. We finally thank the following people for their aid in data analysis: G. Almonti (for the 85 Kr analyses), L. Cadonati (for the radon analyses), C. Galbiati, S. Magni, E. Meroni, G. Ranucci, S. Schoenert and M. Lowry.

PY - 1998/11/11

Y1 - 1998/11/11

N2 - An on-line purification system for a large-scale low-background liquid scintillation detector has been tested with the 5 t liquid scintillation detector, the Counting Test Facility at Gran Sasso. Counter-current water extraction removes polar and charged impurities such as ions and metal salts. Vacuum distillation of the entire scintillator has been applied to remove both radioactive impurities and chemical impurities that affect the optical properties of the scintillator. Filtration with a 0.05 μm particulate filter removed suspended dust particles that may contain U, Th and K. Nitrogen stripping was employed to remove dissolved water and noble gases (e.g. 85Kr) from the scintillator. The system has effectively reduced the internal back in the 5 t liquid scintillation detector from 470 ± 90 events/d to the detection limit of the detector (± 45 events/d) in the energy window 250 < E < 800 keV.

AB - An on-line purification system for a large-scale low-background liquid scintillation detector has been tested with the 5 t liquid scintillation detector, the Counting Test Facility at Gran Sasso. Counter-current water extraction removes polar and charged impurities such as ions and metal salts. Vacuum distillation of the entire scintillator has been applied to remove both radioactive impurities and chemical impurities that affect the optical properties of the scintillator. Filtration with a 0.05 μm particulate filter removed suspended dust particles that may contain U, Th and K. Nitrogen stripping was employed to remove dissolved water and noble gases (e.g. 85Kr) from the scintillator. The system has effectively reduced the internal back in the 5 t liquid scintillation detector from 470 ± 90 events/d to the detection limit of the detector (± 45 events/d) in the energy window 250 < E < 800 keV.

KW - Liquid scintillator

KW - Radiopurity

KW - Solar neutrino

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DO - 10.1016/S0168-9002(98)00767-0

M3 - Article

AN - SCOPUS:0032204579

SN - 0168-9002

VL - 417

SP - 278

EP - 296

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 2-3

ER -

A scintillator purification system for a large scale solar neutrino experiment

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All Science Journal Classification (ASJC) codes

Keywords

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