Development of a Negative Ion Micro TPC Detector with SF${}_6$ Gas for the Directional Dark Matter Search

Abstract

A negative ion micro time projection chamber (NI$\mu$TPC) was developed and its performance studied. An NI$\mu$TPC is a novel technology that enables the measurement of absolute $z$ coordinates for self-triggering TPCs. This technology provides full-fiducialization analysis, which is not possible with conventional gaseous TPCs, and is useful for directional dark matter searches in terms of background rejection and the improvement of the angular resolution. The developed NI$\mu$TPC prototype had a detection volume of 12.8 $\times$ 25.6 $\times$ 144 mm${}^3$. The absolute $z$ coordinate was determined with a location accuracy of 16 mm using minority carrieres of SF${}_5^{-}$. Simultaneously, there was a successful reconstruction of the three-dimensional (3D) tracks with a spatial resolution of 130 $\mu \mathrm{m}$. This is the first demonstration of 3D tracking with the detection of absolute $z$ coordinates, and it is an important step in improving the sensitivity of directional dark matter searches.

References in corpus (6)

• First Dark Matter Search Results from the XENON1T Experiment
• Low Threshold Results and Limits from the DRIFT Directional Dark Matter Detector
• Development of Thick-foil and Fine-pitch GEMs with a Laser Etching Technique
• The novel properties of SF${}_6$ for directional dark matter experiments
• Negative ion Time Projection Chamber operation with SF${}_6$ at nearly atmospheric pressure
• Study of Negative-Ion TPC Using μ-PIC for Directional Dark Matter Search

Cited by in corpus (7)

• The CYGNO Experiment
• Review on dark matter searches
• Directional direct detection of light dark matter up-scattered by cosmic rays from direction of the Galactic center
• The role of small scale experiments in the direct detection of dark matter
• CYG$\nu$S: Detecting solar neutrinos with directional gas time projection chambers
• LTARS: Analog Readout Front-end ASIC for Versatile TPC-applications
• Direction-sensitive dark matter search with a low-background gaseous detector NEWAGE-0.3b''