Abstract
A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of ∼ 35 cm drift × 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized readout and with a sufficiently large sensitive volume ( ∼ 23 l) so as to contain long ( ∼ 20 cm) electron tracks. First results obtained at 1 bar for Xenon and Trymethylamine (Xe-(2%)TMA) mixture are presented. The TPC can accurately reconstruct extended background tracks. An encouraging full-width half-maximum of 11.6 % was obtained for ∼ 29 keV gammas without resorting to any data post-processing.
Original language | English (US) |
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Article number | P03010 |
Journal | Journal of Instrumentation |
Volume | 9 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2014 |
Keywords
- Doublebeta decay detectors
- Particle tracking detectors (Gaseous detectors)
- Time projection chambers
ASJC Scopus subject areas
- Instrumentation
- Mathematical Physics