Speakers
Prof.
Krishna Kumar
(Stony Brook University)Dr
Michal Tarka
(University of Massachusetts, Amherst)Prof.
William Fairbank
(Colorado State University)
Description
We are investigating novel in-situ laser-driven techniques to enhance calibration and monitoring of transport properties of charge clusters in nEXO. One approach is to study electron drift properties in a small liquid xenon TPC using photoelectricity. The charged clusters are generated by driving a semi-transparent gold photocathode in transmission mode with a pulsed ultraviolet laser. Systematic measurements of drift velocities, temperature coefficients and longitudinal diffusion coefficients of both liquid and gaseous xenon at various drift fields were made. In a second approach, liquid xenon purity was studied in a dedicated cell by observing 2- and 3-photon ionization at four different wavelengths. The ionization cross-sections at two different wavelengths were extracted. The behavior of multi-photon ionization and gold photoelectricity in a xenon environment will help in designing appropriate calibration schemes for future large scale noble liquid detectors.
Authorship annotation | for the nEXO collaboration |
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Session and Location | Monday Session, Poster Wall #62 (Auditorium Gallery Right) |
Poster included in proceedings: | yes |
Primary author
Prof.
Krishna Kumar
(Stony Brook University)
Co-authors
Dr
Michal Tarka
(University of Massachusetts, Amherst)
Mr
Oumarou Njoya
(Stony Brook University)
Dr
Thomas Tsang
(Brookhaven National Laboratory)
Dr
Triveni Rao
(Brookhaven National Laboratory)
Prof.
William Fairbank
(Colorado State University)