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Yayınlanmış 1 Ocak 2017 | Sürüm v1
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Noise Characterization and Filtering in the MicroBooNE Liquid Argon TPC

Oluşturanlar

  • 1. FNAL, Batavia, IL 60510 USA
  • 2. Harvard Univ, Cambridge, MA 02138 USA
  • 3. IIT, Chicago, IL 60616 USA
  • 4. Univ Cambridge, Cambridge CB3 0HE, England
  • 5. Univ Texas Arlington, Arlington, TX 76019 USA
  • 6. Univ Bern, CH-3012 Bern, Switzerland
  • 7. Univ Michigan, Ann Arbor, MI 48109 USA
  • 8. Univ Oxford, Oxford OX1 3RH, England
  • 9. TUBITAK Space Technol Res Inst, METU Campus, TR-06800 Ankara, Turkey
  • 10. Univ Lancaster, Lancaster LA1 4YW, England
  • 11. KSU, Manhattan, KS 66506 USA
  • 12. Columbia Univ, New York, NY 10027 USA

Açıklama

The low-noise operation of readout electronics in a liquid argon time projection chamber (LArTPC) is critical to properly extract the distribution of ionization charge deposited on the wire planes of the TPC, especially for the induction planes. This paper describes the characteristics and mitigation of the observed noise in the MicroBooNE detector. The MicroBooNE's single-phase LArTPC comprises two induction planes and one collection sense wire plane with a total of 8256 wires. Current induced on each TPC wire is amplified and shaped by custom low-power, low-noise ASICs immersed in the liquid argon. The digitization of the signal waveform occurs outside the cryostat. Using data from the first year of MicroBooNE operations, several excess noise sources in the TPC were identified and mitigated. The residual equivalent noise charge (ENC) after noise filtering varies with wire length and is found to be below 400 electrons for the longest wires(4.7 m). The response is consistent with the cold electronics design expectations and is found to be stable with time and uniform over the functioning channels. This noise level is significantly lower than previous experiments utilizing warm front-end electronics.

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