Performance of an ultra-pure NaI(Tl) detector produced by an indigenously-developed purification method and crystal growth for the COSINE-200 experiment

Abstract

The COSINE-100 experiment has been operating with 106 kg of low-background NaI(Tl) detectors to test the results from the DAMA/LIBRA experiment, which claims to have observed dark matter. However, since the background of the NaI(Tl) crystals used in the COSINE-100 experiment is 2-3 times higher than that in the DAMA detectors, no conclusion regarding the claimed observation from the DAMA/LIBRA experiment could be reached. Therefore, we plan to upgrade the current COSINE-100 experiment to the next phase, COSINE-200, by using ultra-low background NaI(Tl) detectors. The basic principle was already proved with the commercially available Astro-grade NaI powder from Sigma-Aldrich company. However, we have developed a mass production process of ultra-pure NaI powder at the Center for Underground Physics (CUP) of the Institute for Basic Science (IBS), Korea, using the direct purification of the raw NaI powder. We plan to produce more than 1,000 kg of ultra-pure powder for the COSINE200 experiment. With our crystal grower installed at CUP, we have successfully grown a low-background crystal using our purification technique for the NaI powder. We have assembled a low-background NaI(Tl) detector. In this article, we report the performance of this ultra-pure NaI(Tl) crystal detector produced at IBS, Korea.

References in corpus (29)

• A direct empirical proof of the existence of dark matter
• A History of Dark Matter
• Final model independent result of DAMA/LIBRA-phase1
• Direct Detection of WIMP Dark Matter: Concepts and Status
• Dark matter direct-detection experiments
• Compatibility of DAMA/LIBRA dark matter detection with other searches
• The DAMA/LIBRA apparatus
• First model independent results from DAMA/LIBRA-phase2
• Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
• Initial Performance of the COSINE-100 Experiment
• The SABRE project and the SABRE PoP
• An experiment to search for dark matter interactions using sodium iodide detectors
• Tests on NaI(Tl) crystals for WIMP search at the Yangyang Underground Laboratory
• First limit on WIMP cross section with low background CsI(Tl) crystal detector
• Background model for the NaI(Tl) crystals in COSINE-100
• Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target
• Three-year annual modulation search with COSINE-100
• Analysis of backgrounds for the ANAIS-112 dark matter experiment
• Performance of ANAIS-112 experiment after the first year of data taking
• The COSINE-100 Data Acquisition System
• Muon detector for the COSINE-100 experiment
• Understanding NaI(Tl) crystal background for dark matter searches
• Development of ultra-pure NaI(Tl) detectors for the COSINE-200 experiment
• ANAIS-112 sensitivity in the search for dark matter annual modulation
• Development of highly radiopure NaI(Tl) scintillator for PICOLON dark matter search project
• Growth of Ultra-high Purity NaI(Tl) Crystal for Dark Matter Searches
• Study of cosmogenic radionuclides in the COSINE-100 NaI(Tl) detectors
• Comparison between DAMA/LIBRA and COSINE-100 in the light of Quenching Factors
• A facility for mass production of ultra-pure NaI powder for the COSINE-200 experiment

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• Measurement of the Electron-Neutrino Charged-Current Cross Sections on ${}^{127}$I with the COHERENT NaI$\nu$E detector
• Simulation and background characterisation of the SABRE South experiment
• Search for inelastic WIMP-iodine scattering with COSINE-100
• Scintillation characteristics of an undoped CsI crystal at low-temperature for dark matter search
• Validation of the COSINE-100U NaI(Tl) Encapsulation for Low-Temperature Operation in Liquid Scintillator