Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

J. S. Park; P. Adhikari; G. Adhikari; S. Y. Oh; N. Y. Kim; Y. D. Kim; C. Ha; K. S. Park; H. S. Lee; E. J. Jeon

doi:10.1016/j.nima.2017.01.041

Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

J. S. Park
, P. Adhikari
, G. Adhikari
, S. Y. Oh
, N. Y. Kim
, Y. D. Kim
, C. Ha
, K. S. Park
, H. S. Lee
, E. J. Jeon

Sejong University
Institute for Basic Science

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

23 Scopus citations

Abstract

We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48% of the internal ⁴⁰K background in the 0–10 keV energy region. We also determined the tagging efficiency for events at 6–20 keV as 26.5±1.7% of the total events, which corresponds to 0.76±0.04 events/keV/kg/day. According to a simulation, approximately 60% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0–10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal ⁴⁰K and external background to approximately 80%.

Original language	English
Pages (from-to)	103-107
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	851
DOIs	https://doi.org/10.1016/j.nima.2017.01.041
State	Published - 11 Apr 2017

Keywords

Background veto
Dark matter
Liquid scintillator
Low-background techniques
Radioactivity
WIMP

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10.1016/j.nima.2017.01.041

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Park, J. S., Adhikari, P., Adhikari, G., Oh, S. Y., Kim, N. Y., Kim, Y. D., Ha, C., Park, K. S., Lee, H. S., & Jeon, E. J. (2017). Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 851, 103-107. https://doi.org/10.1016/j.nima.2017.01.041

@article{a9dac264534d4eeb8adfe4744de134bd,

title = "Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment",

abstract = "We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48\% of the internal 40K background in the 0–10 keV energy region. We also determined the tagging efficiency for events at 6–20 keV as 26.5±1.7\% of the total events, which corresponds to 0.76±0.04 events/keV/kg/day. According to a simulation, approximately 60\% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0–10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal 40K and external background to approximately 80\%.",

keywords = "Background veto, Dark matter, Liquid scintillator, Low-background techniques, Radioactivity, WIMP",

author = "Park, \{J. S.\} and P. Adhikari and G. Adhikari and Oh, \{S. Y.\} and Kim, \{N. Y.\} and Kim, \{Y. D.\} and C. Ha and Park, \{K. S.\} and Lee, \{H. S.\} and Jeon, \{E. J.\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = apr,

day = "11",

doi = "10.1016/j.nima.2017.01.041",

language = "English",

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journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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Park, JS, Adhikari, P, Adhikari, G, Oh, SY, Kim, NY, Kim, YD, Ha, C, Park, KS, Lee, HS & Jeon, EJ 2017, 'Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 851, pp. 103-107. https://doi.org/10.1016/j.nima.2017.01.041

Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment. / Park, J. S.; Adhikari, P.; Adhikari, G. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 851, 11.04.2017, p. 103-107.

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

TY - JOUR

T1 - Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

AU - Park, J. S.

AU - Adhikari, P.

AU - Adhikari, G.

AU - Oh, S. Y.

AU - Kim, N. Y.

AU - Kim, Y. D.

AU - Ha, C.

AU - Park, K. S.

AU - Lee, H. S.

AU - Jeon, E. J.

PY - 2017/4/11

Y1 - 2017/4/11

N2 - We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48% of the internal 40K background in the 0–10 keV energy region. We also determined the tagging efficiency for events at 6–20 keV as 26.5±1.7% of the total events, which corresponds to 0.76±0.04 events/keV/kg/day. According to a simulation, approximately 60% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0–10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal 40K and external background to approximately 80%.

AB - We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48% of the internal 40K background in the 0–10 keV energy region. We also determined the tagging efficiency for events at 6–20 keV as 26.5±1.7% of the total events, which corresponds to 0.76±0.04 events/keV/kg/day. According to a simulation, approximately 60% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0–10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal 40K and external background to approximately 80%.

KW - Background veto

KW - Dark matter

KW - Liquid scintillator

KW - Low-background techniques

KW - Radioactivity

KW - WIMP

UR - https://www.scopus.com/pages/publications/85011841058

U2 - 10.1016/j.nima.2017.01.041

DO - 10.1016/j.nima.2017.01.041

M3 - Article

AN - SCOPUS:85011841058

SN - 0168-9002

VL - 851

SP - 103

EP - 107

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

ER -

Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

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