Wed·Oct 12, 2022Wednesday·October 12, 2022

1. 01*

   Estimation of the number of counts on a particle counter detector with full time resolution

   Flavia Gesualdi🇦🇷 · Alberto Daniel Supanitsky🇦🇷

   We present a general method for estimating the number of particles impinging on a segmented counter or, in general, on a counter with sub-units. We account for unresolved particles, i.e., the effect of two or more particles hitting the same sub-unit almost simultaneously. To achieve full time resolution we account for the dead time that occurs after the first time-bin of a particle signal. This general counting method can be applied to counting muons in existing detectors like the Underground Muon Detector of the Pierre Auger Observatory. We therefore use the latter as a study case to test the performance of our method and to compare it to other methods from literature. Our method proves to perform with little bias, and also provides an estimate of the number of particles as a function of time (as seen by the detector) to a single time-bin resolution. In this context, the new method can be useful for reconstructing parameters sensitive to cosmic ray mass, which are key to unveiling the origin of cosmic rays.

   ↳ physics.ins-detastro-ph.IMhep-exnucl-ex+1EPJC(2022)·12 citations
2. 02*

   The DAMIC-M Experiment: Status and First Results

   I. Arnquist🇺🇸 · N. Avalos🇦🇷 · P. Bailly🇫🇷 · D. Baxter🇺🇸 · X. Bertou🇦🇷 · M. Bogdan🇺🇸 · C. Bourgeois🇫🇷 · J. Brandt🇺🇸 · A. Cadiou🇫🇷 · N. Castelló-Mor🇪🇸 · A.E. Chavarria🇺🇸 · M. Conde🇺🇸 and 60 other authors

   The DAMIC-M (DArk Matter In CCDs at Modane) experiment employs thick, fully depleted silicon charged-coupled devices (CCDs) to search for dark matter particles with a target exposure of 1 kg-year. A novel skipper readout implemented in the CCDs provides single electron resolution through multiple non-destructive measurements of the individual pixel charge, pushing the detection threshold to the eV-scale. DAMIC-M will advance by several orders of magnitude the exploration of the dark matter particle hypothesis, in particular of candidates pertaining to the so-called "hidden sector." A prototype, the Low Background Chamber (LBC), with 20g of low background Skipper CCDs, has been recently installed at Laboratoire Souterrain de Modane and is currently taking data. We will report the status of the DAMIC-M experiment and first results obtained with LBC commissioning data.

   ↳ hep-exastro-ph.IMnucl-exphysics.ins-detSciPost Phys.Proc.(2023)·21 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.