Test of \textit{Topmetal-${II}^{-}$} In Liquid Nitrogen For Cryogenic Temperature TPCs

Abstract

\textit{Topmetal-${II}^{-}$} is a highly pixelated direct charge sensor that contains a 72$\times$72 pixel array of 83$\mu$m pitch size. The key feature of \textit{Topmetal-${II}^{-}$} is that it can directly collect charges via metal nodes of each pixel to form two-dimensional images of charge cloud distributions. \textit{Topmetal-${II}^{-}$} was proved to measure charged particles without amplification at room temperature. To measure its performance at cryogenic temperature, a \textit{Topmetal-${II}^{-}$} sensor is embedded into a liquid nitrogen dewar. The results presented in this paper show that \textit{Topmetal-${II}^{-}$} can also operate well at this low temperature with a noise (ENC) of 12 e${}^{-}$ lower than that at room temperature (13 e${}^{-}$). From the noise perspective, \textit{Topmetal-${II}^{-}$} is a promising candidate for the next generation readout of liquid argon and xenon Time Projection Chamber (TPC) used in experiments searching for neutrinoless double beta decay and dark matter.

arXiv comment5 pages

References in corpus (3)

• Double Beta Decay: Historical Review of 75 Years of Research
• LANNDD---A Massive Liquid Argon Detector for Proton Decay, Supernova and Solar Neutrino Studies, and a Neutrino Factory Detector
• A Low-Noise CMOS Pixel Direct Charge Sensor, Topmetal-II-

Cited by in corpus (4)

• Topmetal-M: a novel pixel sensor for compact tracking applications
• Three-dimensional convolutional neural networks for neutrinoless double-beta decay signal/background discrimination in high-pressure gaseous Time Projection Chamber
• A beam monitor using silicon pixel sensors for hadron therapy
• A highly pixelated CdZnTe detector based on \textit{Topmetal-${II}^{-}$} sensor