The SENSEI Experiment

Tiffenberg, J.

doi:10.1007/978-3-030-31593-1_18

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…The OPT model has an ionization threshold Qth ¼ 3 (hence no entries for R bkg Q¼1;2 ) to mitigate the background through sideband measurements. Following[49], the constant background rate is taken to be uniform across all bins.…”

mentioning

confidence: 99%

Dark matter substructure under the electron scattering lamppost

et al. 2020

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We study the mutual relationship between dark matter-electron scattering experiments and possible new dark matter substructure nearby hinted by the Gaia data. We show how kinematic substructure could affect the average and modulation spectra of dark matter-electron scattering in semiconductors and the discovery reaches of future experiments with these targets. Conversely, we demonstrate how future data could probe and constrain the fraction of dark matter in substructure, even when it constitutes a subdominant component of the local dark matter density.

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mentioning

confidence: 99%

Dark matter substructure under the electron scattering lamppost

et al. 2020

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“…The charge is then clocked to the end of the serial register where a charge-to-voltage amplifier is located for readout. Unlike conventional CCDs, skipper CCDs [17][18][19] can be configured to make multiple non-destructive charge measurements (NDCMs). Skipper readout essentially moves the charge contained in each pixel back-and-forth into the readout node allowing for many measurements of the same pixel, so that they can be averaged.…”

Section: Experimental Setup and Data Setsmentioning

confidence: 99%

“…Compared to scientific CCDs with conventional readout, e.g. those used by the precursor DAMIC experiment [12][13][14][15][16], skipper CCDs allow for a significant reduction in readout noise, enabling the detection of single electrons and energy thresholds of a few eV [17][18][19]. With skipper readout, DAMIC-M has unprecedented sensitivity to nuclear and electronic recoils from interactions of low-mass (1-10 4 MeV/c 2 ) dark matter candidates in the bulk silicon of the CCDs.…”

Section: Introductionmentioning

confidence: 99%

Precision measurement of Compton scattering in silicon with a skipper CCD for dark matter detection

Norcini,

Castello-Mor,

Baxter

et al. 2022

Preprint

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Experiments aiming to directly detect dark matter through particle recoils can achieve energy thresholds of O(10 eV). In this regime, ionization signals from small-angle Compton scatters of environmental γ-rays constitute a significant background. Monte Carlo simulations used to build background models have not been experimentally validated at these low energies. We report a precision measurement of Compton scattering on silicon atomic shell electrons down to 23 eV. A skipper charge-coupled device (CCD) with single-electron resolution, developed for the DAMIC-M experiment, was exposed to a 241 Am γ-ray source over several months. Features associated with the silicon K, L1, and L2,3-shells are clearly identified, and scattering on valence electrons is detected for the first time below 100 eV. We find that the relativistic impulse approximation for Compton scattering, which is implemented in Monte Carlo simulations commonly used by direct detection experiments, does not reproduce the measured spectrum below 0.5 keV. The data are in better agreement with ab initio calculations originally developed for X-ray absorption spectroscopy.

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“…The OPT model has an ionization threshold Q th = 3 (hence no entries for R bkg Q=1,2 ) to mitigate the background through sideband measurements. Following [47], the constant background rate is taken to be uniform across all bins. coil data with higher thresholds Q th .…”

Section: Analysis Setupmentioning

confidence: 99%

Dark Matter Substructure under the Electron Scattering Lamppost

Buch,

Buen-Abad,

Fan

et al. 2020

Preprint

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We study the mutual relationship between dark matter-electron scattering experiments and possible new dark matter substructure nearby hinted by the Gaia data. We show how kinematic substructure could affect the average and modulation spectra of dark matter-electron scattering in semiconductors, and the discovery reaches of future experiments with these targets. Conversely, we demonstrate how future data could probe and constrain the substructure dark matter fraction, even when it constitutes a sub-dominant component of the local dark matter density.

show abstract

The SENSEI Experiment

Cited by 4 publications

References 17 publications

Dark matter substructure under the electron scattering lamppost

Dark matter substructure under the electron scattering lamppost

Precision measurement of Compton scattering in silicon with a skipper CCD for dark matter detection

Dark Matter Substructure under the Electron Scattering Lamppost

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