The Skin Detector System of the LZ Dark Matter Experiment

@misc{akerib2026skin,
  title = {{The Skin Detector System of the LZ Dark Matter Experiment}},
  author = {D. S. Akerib and A. K. Al Musalhi and F. Alder and B. J. Almquist and C. S. Amarasinghe and A. Ames and T. J. Anderson and N. Angelides and H. M. Araújo and J. E. Armstrong and M. Arthurs and A. Baker and S. Balashov and J. Bang and J. W. Bargemann and E. E. Barillier and K. Beattie and A. Beauchene and A. Bhatti and T. P. Biesiadzinski and H. J. Birch and E. Bishop and G. M. Blockinger and C. A. J. Brew and P. Brás and S. Burdin and M. C. Carmona-Benitez and M. Carter and A. Chawla and Y. T. Chin and S. Contreras and M. V. Converse and R. Coronel and A. Cottle and G. Cox and D. Curran and C. E. Dahl and I. Darlington and S. Dave and A. David and J. Delgaudio and S. Dey and L. de Viveiros and L. Di Felice and C. Ding and J. E. Y. Dobson and E. Druszkiewicz and S. Dubey and C. L. Dunbar and S. R. Eriksen and N. M. Fearon and N. Fieldhouse and S. Fiorucci and H. Flaecher and E. D. Fraser and T. M. A. Fruth and P. W. Gaemers and R. J. Gaitskell and A. Geffre and J. Genovesi},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.00010},
  eprint = {2611.00010},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.00010},
  note = {CC BY-NC-SA 4.0},
}

TY  - UNPB
TI  - The Skin Detector System of the LZ Dark Matter Experiment
AU  - D. S. Akerib
AU  - A. K. Al Musalhi
AU  - F. Alder
AU  - B. J. Almquist
AU  - C. S. Amarasinghe
AU  - A. Ames
AU  - T. J. Anderson
AU  - N. Angelides
AU  - H. M. Araújo
AU  - J. E. Armstrong
AU  - M. Arthurs
AU  - A. Baker
AU  - S. Balashov
AU  - J. Bang
AU  - J. W. Bargemann
AU  - E. E. Barillier
AU  - K. Beattie
AU  - A. Beauchene
AU  - A. Bhatti
AU  - T. P. Biesiadzinski
AU  - H. J. Birch
AU  - E. Bishop
AU  - G. M. Blockinger
AU  - C. A. J. Brew
AU  - P. Brás
AU  - S. Burdin
AU  - M. C. Carmona-Benitez
AU  - M. Carter
AU  - A. Chawla
AU  - Y. T. Chin
AU  - S. Contreras
AU  - M. V. Converse
AU  - R. Coronel
AU  - A. Cottle
AU  - G. Cox
AU  - D. Curran
AU  - C. E. Dahl
AU  - I. Darlington
AU  - S. Dave
AU  - A. David
AU  - J. Delgaudio
AU  - S. Dey
AU  - L. de Viveiros
AU  - L. Di Felice
AU  - C. Ding
AU  - J. E. Y. Dobson
AU  - E. Druszkiewicz
AU  - S. Dubey
AU  - C. L. Dunbar
AU  - S. R. Eriksen
AU  - N. M. Fearon
AU  - N. Fieldhouse
AU  - S. Fiorucci
AU  - H. Flaecher
AU  - E. D. Fraser
AU  - T. M. A. Fruth
AU  - P. W. Gaemers
AU  - R. J. Gaitskell
AU  - A. Geffre
AU  - J. Genovesi
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.00010
UR  - https://arxiv.org/abs/2611.00010
AB  - This paper presents the design, calibration, and performance of the Skin Detector component of the LUX-ZEPLIN (LZ) dark matter experiment. The Skin Detector consists of approximately 2 tonnes of liquid xenon instrumented with 131 photomultiplier tubes, surrounding the central time-projection chamber and functions as an active veto system for background rejection. Energy calibration with monoenergetic gamma sources established a position-dependent energy scale and determined prompt and delayed veto thresholds. Radon decays in the Skin can be identified with less than 15~mm spatial resolution, revealing stable convective flow patterns with measured velocities ranging from 2-4 mm/s that persisted throughout extended data-taking periods. The achieved Skin veto threshold meets or exceeds the design goal of 100~keV throughout the Skin volume. The prompt veto efficiency for gamma rays emitted following electron capture in ^127Xe is found to be (88 ± 2)\%, consistent with the simulated value of (90.4 ± 0.6)\%. M-shell EC decays are used to validate the LZ detector sensitivity for low-mass dark matter during the first science run.
ER  -