Lawrence Livermore National Laboratory



Jingke Xu

Staff Physicist
Nuclear and Chemical Sciences Division


 +1 925-422-5002

Research Interests

My research focuses on the detection of rare events, including the searches for dark matter particles and the detection of low-energy neutrino interactions. I worked on the Borexino solar neutrino experiment and the DarkSide dark matter experiment for my Ph.D. dissertation (Princeton, 2013). After graduation, I worked as a postdoc on the SABRE NaI(Tl) dark matter experiment to test the longstanding DAMA dark matter claim. At LLNL, I work in the Rare Event Detection Group on the LUX/LZ dark matter experiments, and on the development of noble liquid technology for more sensitive dark matter and neutrino detections.

Publications

Jingke Xu, et al, “First measurement of surface nuclear recoil background for argon dark matter searches”, Phys. Rev. D 96, 061101(R), September 2017

Jingke Xu, et al, “Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold”, Phys. Rev. C 92, 015807, 2015

Jingke Xu, et al, “A study of the residual 39Ar content in argon from underground sources”, Astroparticle Physics, Volume 66, 2015, Pages 53–60.

Jingke Xu, et al, “SABRE – A test of DAMA with high-purity NaI(Tl) crystals”, AIP Conf. Proc. 1672, 040001 (2015)

S. Westerdale, Jingke Xu, et al, “Quenching Measurements and Modeling of a Boron-Loaded Organic Liquid Scintillator”, Journal of Instrumentation,  Volume 12,  2017

S. Incerti, B. Suerfu, Jingke Xu, et al, “Simulation of Auger electron emission from nanometer-size gold targets using the Geant4 Monte Carlo simulation toolkit”, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 372,  2016, Pages 91–101

LUX Collaboration, “Results from a search for dark matter in the complete LUX exposure”, Physical Review Letters 118 (2), 021303 (2017)

LUX Collaboration, “Signal yields, energy resolution, and recombination fluctuations in liquid xenon”, Phys. Rev. D 95, 012008 (2017)

LUX Collaboration, “Limits on Spin-Dependent WIMP-Nucleon Cross Section Obtained from the Complete LUX Exposure”, Phys. Rev. Lett. 118, 251302 (2017)

LUX Collaboration, “Ultra-Low Energy Calibration of LUX Detector using 127Xe Electron Capture”, under review by Physical Review D, September 2017, preprint on arXiv: 1709.00800

LUX Collaboration, “3D Modeling of Electric Fields in the LUX Detector”, under review by Physical Review D, September 2017, preprint on arXiv: 1709.00095

LUX Collaboration, “83mKr calibration of the 2013 LUX dark matter search”, under review by Physical Review D, August 2017, preprint on arXiv: 1708.02566

LUX Collaboration, “First Searches for Axions and Axionlike Particles with the LUX Experiment”, Phys. Rev. Lett. 118, 261301 (2017)

DarkSide Collaboration, “Effect of low electric fields on alpha scintillation light yield in liquid argon”, Journal of Instrumentation, Volume 12, 2017

DarkSide Collaboration, “Results from the first use of low radioactivity argon in a dark matter search”, Phys. Rev. D 93, 081101(2016)

DarkSide Collaboration, “The electronics and data acquisition system for the DarkSide-50 veto detectors”, Journal of Instrumentation, Volume 11, 2016

DarkSide Collaboration, “The veto system of the DarkSide-50 experiment”, Journal of Instrumentation, Volume 11, 2016

DarkSide Collaboration, “First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso”, Physics Letters B, 2015, Volume 743, Pages 456–466.

DarkSide Collaboration, “DarkSide search for dark matter”, Journal of Instrumentation, Volume 8, 2013

DarkSide Collaboration, “Light yield in DarkSide-10: A prototype two-phase argon TPC for dark matter searches”, Astroparticle Physics, Volume 49, 2013, Pages 44–51

Borexino Collaboration, “Final results of Borexino Phase-I on low-energy solar neutrino spectroscopy”, Phys. Rev. D 89, 112007 (2014)

Borexino Collaboration, “New limits on heavy sterile neutrino mixing in B8 decay obtained with the Borexino detector”, Phys. Rev. D 88, 072010 (2013)

Borexino Collaboration, “Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth”, Journal of Cosmology and Astroparticle Physics, Volume 2013, 2013

Borexino Collaboration, “Lifetime measurements of 214Po and 212Po with the CTF liquid scintillator detector at LNGS”, The European Physical Journal A, 2013, 49:92

Borexino Collaboration, “Measurement of geo-neutrinos from 1353 days of Borexino”, Physics Letters B, Volume 722, Issues 4–5, 2013, Pages 295–300

Borexino Collaboration, “Measurement of CNGS muon neutrino speed with Borexino”, Physics Letters B, Volume 716, Issues 3–5, 2012, Pages 401–405

Borexino Collaboration, “Borexino calibrations: hardware, methods, and results”, Journal of Instrumentation, Volume 7, 2012

Borexino Collaboration, “Cosmic-muon flux and annual modulation in Borexino at 3800 m water-equivalent depth”, Journal of Cosmology and Astroparticle Physics, Volume 2012, 2012

Borexino Collaboration, “Search for solar axions produced in the p(d,He3)A reaction with Borexino detector”, Phys. Rev. D 85, 092003 (2012)

Borexino Collaboration, “First Evidence of pep Solar Neutrinos by Direct Detection in Borexino”, Phys. Rev. Lett. 108, 051302 (2012)

Borexino Collaboration, “Absence of a day–night asymmetry in the 7Be solar neutrino rate in Borexino”, Physics Letters B, Volume 707, Issue 1, 2012, Pages 22–26

Borexino Collaboration, “Precision measurement of the 7Be solar neutrino interaction rate in Borexino”, Phys. Rev. Lett., 107, 141302 (2011).

Borexino Collaboration, “Muon and cosmogenic neutron detection in Borexino”, Journal of Instrumentation, Volume 6, 2011

Borexino Collaboration, “Study of solar and other unknown anti-neutrino fluxes with Borexino at LNGS”, Physics Letters B, Volume 696, Issue 3, 2011, Pages 191–196

Borexino Collaboration, “Measurement of the solar B8 neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector”, Phys. Rev. D 82, 033006 (2010)

Borexino Collaboration, “Observation of geo-neutrinos”, Physics Letters B, Volume 687, Issues 4–5, 2010, Pages 299–304

Borexino Collaboration, “New experimental limits on the Pauli-forbidden transitions in C12 nuclei obtained with 485 days Borexino data”, G. Bellini et al. (Borexino Collaboration), Phys. Rev. C 81, 034317 (2010)

Invited Talks

“Direct dark matter searches: WIMPs and beyond”, Queen’s University, Kingston, Ontario, Canada, May 5th, 2017

“Direct Search of Dark Matter with Xenon: results and R&D”, Physical and Life Sciences Directorate Postdoc Seminar, Lawrence Livermore National Laboratory, Livermore, CA, February 7, 2017

“The latest progress of direct search for dark matter with the LUX detector”, Center for Theoretical Underground Physics and Related Areas (CETUP*), Lead, SD, July 4-15, 2016

“Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold”, Workshop on calibration of low energy particle detectors, Chicago, IL, September  23-25, 2015

“SABRE—Test of DAMA/LIBRA Using NaI(Tl)”, Berkeley Workshop on Dark Matter Detection, Lawrence Berkeley National Laboratory, Berkeley CA, June 8-9, 2015

“SABRE -- a NaI(Tl) experiment to test DAMA/LIBRA”, HEP Seminar, University of Chicago, Chicago, IL, May 18, 2015

“SABRE – A test of DAMA with high-purity NaI(Tl) crystals”, Low Radioactivity Techniques 2015 (LRT 2015), Seattle, WA, March 18-20, 2015

“Searches for dark matter with radio-pure argon and NaI(Tl)”, INPA seminar, Lawrence Berkeley National Laboratory, Berkeley CA, February 19, 2015

“SABRE – A new NaI dark matter experiment”, UCLA Dark Matter Conference 2014, Los Angeles, CA, Feb. 2014.

“Measurement of the extraordinarily low 39Ar content in underground argon for dark matter experiments”, Kimballton Underground Research Facility Annual Meeting, Blacksburg, VA, June 2013.

“SABRE – A new experiment to test the DAMA/LIBRA result”, Dark Matter Paradigm Workshop, Princeton Center for Theoretical Science, Princeton, NJ, Oct. 2012.

“Search for WIMP dark matter particles with the DarkSide detector”, International Symposium on Neutrino Physics and Beyond, Shenzhen, China, Sept. 2012.