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Title: Characterization of an Ionization Readout Tile for nEXO

Journal Article · · Journal of Instrumentation
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  1. Stanford University
  2. Chinese Academy of Sciences
  3. Oak Ridge National Laboratory
  4. Friedrich-Alexander-Universitat Erlangen-Nurnberg
  5. SLAC National Accelerator Lab
  6. University of Massachusetts at Amherst
  7. Institute of High Energy Physics
  8. Indiana University-Bloomington
  9. Friedrich-Alexander-University
  10. BATTELLE (PACIFIC NW LAB)
  11. Carleton Univeristy, Ontairo Canada
  12. University of Chicago
  13. University of Illinois
  14. Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National
  15. Universite de Sherbrooke
  16. Princeton University
  17. TRIUMF, Vancouver, BC, Canada
  18. Institute for Theoretical and Experimental Physics
  19. Institute of High nergy Physics, Beijing, China
  20. High Magnetic Field Laboratory, Chinese Academy of Sciences
  21. Colorado State University, Fort Collins, Colorado
  22. Brookhaven National Laboratory
  23. Laurentian University of Sudbury
  24. Colorado State University
  25. Carleton University
  26. SLAC National Accelerator Laboratory
  27. University of South Dakota
  28. University of Alabama - Tuscaloosa
  29. TRIUMF
  30. Drexel University
  31. LLNL
  32. Lawrence Livermore National Laboratory
  33. McGill University
  34. Institute of High Energy Physics, Chinese Academy of Sciences
  35. University of Massachusetts
  36. Stony Brook University
  37. IBS Center for Underground Physics in Korea
  38. University of Illinois at Urbana-Champaign
  39. Yale University
  40. Rensselaer Polytechnic Institute
  41. University of Alabama in Huntsville
  42. Lawrence Livermore National Lab
  43. Max Planck Institute for Chemistry, Mainz, Germany
  44. SLAC
  45. Institute for Theoretical and Experimental PHysics, Moscow, Russia
  46. Federal Office of Meteorology and Climatology MeteoSwiss, Payerne, Switzerland
  47. Institute for Theoretical adn Experimental Physics
  48. Chinese Academy of Sciences, Beijing, China
+ Show Author Affiliations

Anewdesign for the anode of a time projection chamber, consisting of a charge-detecting "tile", is investigated for use in large scale liquid xenon detectors. The tile is produced by depositing 60 orthogonal metal charge-collecting strips, 3 mm wide, on a 10 cm 10 cm fused-silica wafer. These charge tiles may be employed by large detectors, such as the proposed tonne-scale nEXO experiment to search for neutrinoless double-beta decay. Modular by design, an array of tiles can cover a sizable area. The width of each strip is small compared to the size of the tile, so a Frisch grid is not required. A grid-less, tiled anode design is beneficial for an experiment such as nEXO, where a wire tensioning support structure and Frisch grid might contribute radioactive backgrounds and would have to be designed to accommodate cycling to cryogenic temperatures. The segmented anode also reduces some degeneracies in signal reconstruction that arise in large-area crossed-wire time projection chambers. A prototype tile was tested in a cell containing liquid xenon. Very good agreement is achieved between the measured ionization spectrum of a 207Bi source and simulations that include the microphysics of recombination in xenon and a detailed modeling of the electrostatic field of the detector. An energy resolution E=5.5% is observed at 570 keV, comparable to the best intrinsic ionization-only resolution reported in literature for liquid xenon at 936 V/cm.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1510270
Report Number(s):
PNNL-SA-130966
Journal Information:
Journal of Instrumentation, Vol. 13, Issue 1
Country of Publication:
United States
Language:
English

References (6)

Charge Transport in Solid and Liquid Ar, Kr, and Xe journal February 1968
Geant4 developments and applications journal February 2006
Enhancement of NEST capabilities for simulating low-energy recoils in liquid xenon journal October 2013
Correlated fluctuations between luminescence and ionization in liquid xenon journal August 2003
Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector journal February 2017
Liquid xenon detectors for particle physics and astrophysics journal July 2010

Cited By (2)

Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double- β decay journal June 2018
Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay text January 2017

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