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Title: Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches

Abstract

The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double-vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of 238Ue~<1.6~mBq/kg, 238Ul~<0.09~mBq/kg, 232The~=0.28±0.03~mBq/kg, 232Thl~=0.25±0.02~mBq/kg, 40K~<0.54~mBq/kg, and 60Co~<0.02~mBq/kg (68\% CL). Such low intrinsic activities, which are some of the lowest ever reported for titanium, enable its use for future dark matter and other rare event searches. Monte Carlo simulations have been performed to assess the expected background contribution from the LZ cryostat with this radioactivity. In 1,000 days of WIMP search exposure of a 5.6-tonne fiducial mass, the cryostat will contribute only a mean background of 0.160±0.001(stat)±0.030(sys) counts.

Authors:
 [1]
  1. et al.
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
LZ
OSTI Identifier:
1354875
Alternate Identifier(s):
OSTI ID: 1395351; OSTI ID: 1419425; OSTI ID: 1436647; OSTI ID: 1549306; OSTI ID: 1601967
Report Number(s):
FERMILAB-PUB-17-069-AE-PPD; arXiv:1702.02646; PNNL-SA-129064
Journal ID: ISSN 0927-6505; 1512771
Grant/Contract Number:  
AC02-07CH11359; AC05-76RL01830; AC02-76SF00515; SC0012704; SC0010010; AC02-05CH11231; SC0012161; SC0014223; FG02- 13ER42020; FG02-91ER40674; NA0000979; SC0011702; SC0006572; SC0012034; SC0006605; FG02-10ER46709; NSF PHY-110447; NSF PHY-1506068; NSF PHY-1312561; NSF PHY-1406943; NSF PHY-1642619; ST/K006428/1; ST/M003655/1; ST/M003981/1; ST/M003744/1; ST/M003639/1; ST/M003604/1; ST/M003469/1; CERN/FP/123610/2011; PTDC/FIS-NUC/1525/2014; IE141517; UW PRJ82AJ; SC005336; DESC0012704; DESC0006572; DESC0012034
Resource Type:
Accepted Manuscript
Journal Name:
Astroparticle Physics
Additional Journal Information:
Journal Volume: 96; Journal ID: ISSN 0927-6505
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Akerib, D. S.. Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches. United States: N. p., 2017. Web. https://doi.org/10.1016/j.astropartphys.2017.09.002.
Akerib, D. S.. Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches. United States. https://doi.org/10.1016/j.astropartphys.2017.09.002
Akerib, D. S.. Mon . "Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches". United States. https://doi.org/10.1016/j.astropartphys.2017.09.002. https://www.osti.gov/servlets/purl/1354875.
@article{osti_1354875,
title = {Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches},
author = {Akerib, D. S.},
abstractNote = {The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double-vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of 238Ue~<1.6~mBq/kg, 238Ul~<0.09~mBq/kg, 232The~=0.28±0.03~mBq/kg, 232Thl~=0.25±0.02~mBq/kg, 40K~<0.54~mBq/kg, and 60Co~<0.02~mBq/kg (68\% CL). Such low intrinsic activities, which are some of the lowest ever reported for titanium, enable its use for future dark matter and other rare event searches. Monte Carlo simulations have been performed to assess the expected background contribution from the LZ cryostat with this radioactivity. In 1,000 days of WIMP search exposure of a 5.6-tonne fiducial mass, the cryostat will contribute only a mean background of 0.160±0.001(stat)±0.030(sys) counts.},
doi = {10.1016/j.astropartphys.2017.09.002},
journal = {Astroparticle Physics},
number = ,
volume = 96,
place = {United States},
year = {2017},
month = {9}
}

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Works referenced in this record:

Liquid noble gas detectors for low energy particle physics
journal, April 2013


Limits on the Spin-Dependent WIMP-Nucleon Cross Sections from the First Science Run of the ZEPLIN-III Experiment
journal, October 2009


WIMP-nucleon cross-section results from the second science run of ZEPLIN-III
journal, March 2012


Measurements of extremely low radioactivity levels in stainless steel for GERDA
journal, August 2008

  • Maneschg, W.; Laubenstein, M.; Budjáš, D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 593, Issue 3
  • DOI: 10.1016/j.nima.2008.05.036

Cosmogenic activation of materials used in rare event search experiments
journal, November 2016


First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility
journal, March 2014


Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data
journal, April 2016


Results on the Spin-Dependent Scattering of Weakly Interacting Massive Particles on Nucleons from the Run 3 Data of the LUX Experiment
journal, April 2016


Results from a Search for Dark Matter in the Complete LUX Exposure
journal, January 2017


Study of the Kroll-process to produce ultra-pure Ti for the low background experiments
conference, January 2015

  • Mozhevitina, Elena; Chepurnov, Alexander; Chub, Alexander
  • LOW RADIOACTIVITY TECHNIQUES 2015 (LRT 2015): Proceedings of the 5th International Workshop in Low Radioactivity Techniques, AIP Conference Proceedings
  • DOI: 10.1063/1.4927986

Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Radiopurity control in the NEXT-100 double beta decay experiment: procedures and initial measurements
journal, January 2013


The DarkSide Multiton Detector for the Direct Dark Matter Search
journal, January 2015

  • Aalseth, C. E.; Agnes, P.; Alton, A.
  • Advances in High Energy Physics, Vol. 2015
  • DOI: 10.1155/2015/541362

Physics reach of the XENON1T dark matter experiment.
journal, April 2016


Radioactivity backgrounds in ZEPLIN–III
journal, March 2012


The EXO-200 detector, part I: detector design and construction
journal, May 2012


The background in the $$0\nu \beta \beta $$ 0 ν β β experiment Gerda
journal, April 2014


High voltage testing for the Majorana Demonstrator
journal, July 2016

  • Abgrall, N.; Arnquist, I. J.; Avignone, F. T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 823
  • DOI: 10.1016/j.nima.2016.04.006

LUXSim: A component-centric approach to low-background simulations
journal, May 2012

  • Akerib, D. S.; Bai, X.; Bedikian, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 675
  • DOI: 10.1016/j.nima.2012.02.010

Sources: A code for calculating (alpha, n), spontaneous fission, and delayed neutron sources and spectra
journal, May 2009


Neutron background in large-scale xenon detectors for dark matter searches
journal, September 2004


Low-energy neutron propagation in MCNPX and GEANT4
journal, May 2006

  • Lemrani, R.; Robinson, M.; Kudryavtsev, V. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 560, Issue 2
  • DOI: 10.1016/j.nima.2005.12.238

Calculation of neutron background for underground experiments
journal, October 2008

  • Tomasello, V.; Kudryavtsev, V. A.; Robinson, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 595, Issue 2
  • DOI: 10.1016/j.nima.2008.07.071

Radioactive background in a cryogenic dark matter experiment
journal, September 2010


EMPIRE: Nuclear Reaction Model Code System for Data Evaluation
journal, December 2007


    Works referencing / citing this record:

    Projected WIMP sensitivity of the LUX-ZEPLIN dark matter experiment
    journal, March 2020


    Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double- β decay
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    Direct detection of WIMP dark matter: concepts and status
    journal, August 2019