Direction-Sensitive Dark Matter Search Using Micro Time-Projection-Chamber

Abstract NEWAGE is a direction-sensitive dark matter search using a low-pressure gaseous time projection chamber. A low alpha-ray emission rate micro pixel chamber had been developed in order to reduce background for dark matter search. We conducted the dark matter search at the Kamioka Observatory in 2018. The total live time was 107.6 days corresponding to an exposure of 1.1 kg⋅days. Two events remained in the energy region of 50-60 keV which was consistent with 2.5 events of the expected background. A directional analysis was carried out and no significant forward-backward asymmetry derived from the WIMP-nucleus elastic scatterings was found. Thus a 90% confidence level upper limit on Spin-Dependent WIMP-proton cross section of 50 pb for a WIMP mass of 100 GeV/c2 was derived. This limit is the most stringent yet obtained from direction-sensitive dark matter search experiments.

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The DarkSide Multiton Detector for the Direct Dark Matter Search

Advances in High Energy Physics ◽

10.1155/2015/541362 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 17

Author(s):

C. E. Aalseth ◽

P. Agnes ◽

A. Alton ◽

K. Arisaka ◽

D. M. Asner ◽

...

Keyword(s):

Dark Matter ◽

Time Projection Chamber ◽

Liquid Argon ◽

Weakly Interacting Massive Particles ◽

Low Energy ◽

Background Suppression ◽

Dark Matter Search ◽

Nuclear Recoils ◽

Time Projection ◽

Direct Dark Matter

Although the existence of dark matter is supported by many evidences, based on astrophysical measurements, its nature is still completely unknown. One major candidate is represented by weakly interacting massive particles (WIMPs), which could in principle be detected through their collisions with ordinary nuclei in a sensitive target, producing observable low-energy (<100 keV) nuclear recoils. The DarkSide program aims at the WIPMs detection using a liquid argon time projection chamber (LAr-TPC). In this paper we quickly review the DarkSide program focusing in particular on the next generation experiment DarkSide-G2, a 3.6-ton LAr-TPC. The different detector components are described as well as the improvements needed to scale the detector from DarkSide-50 (50 kg LAr-TPC) up to DarkSide-G2. Finally, the preliminary results on background suppression and expected sensitivity are presented.

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Directional Dark Matter Searches with CYGNO

Particles ◽

10.3390/particles4030029 ◽

2021 ◽

Vol 4 (3) ◽

pp. 343-353

Author(s):

Fernando Domingues Amaro ◽

Elisabetta Baracchini ◽

Luigi Benussi ◽

Stefano Bianco ◽

Cesidio Capoccia ◽

...

Keyword(s):

Dark Matter ◽

Atmospheric Pressure ◽

Time Projection Chamber ◽

Negative Ion ◽

Cmos Camera ◽

Resolution Time ◽

3D Tracking ◽

Ion Drift ◽

Optical Readout ◽

Time Projection

The CYGNO project aims at developing a high resolution Time Projection Chamber with optical readout for directional dark matter searches and solar neutrino spectroscopy. Peculiar CYGNO’s features are the 3D tracking capability provided by the combination of photomultipliers and scientific CMOS camera signals, combined with a helium-fluorine-based gas mixture at atmospheric pressure amplified by gas electron multipliers structures. In this paper, the performances achieved with CYGNO prototypes and the prospects for the upcoming underground installation at Laboratori Nazionali del Gran Sasso of a 50-L detector in fall 2021 will be discussed, together with the plans for a 1-m3 experiment. The synergy with the ERC consolidator, grant project INITIUM, aimed at realising negative ion drift operation within the CYGNO 3D optical approach, will be further illustrated.

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