remoTES: A new design for the cryogenic NaI detectors of the COSINUS experiment

SciPost Physics Proceedings Pub Date : 2023-07-04 DOI:10.21468/scipostphysproc.12.033

L. Einfalt, G. Angloher, Mukund Raghunath Bharadwaj, I. Dafinei, N. Di Marco, F. Ferroni, S. Fichtinger, A. Filipponi, T. Frank, M. Friedl, A. Fuss, Z. Ge, M. Heikinheimo, K. Huitu, M. Kellermann, R. Maji, M. Mancuso, L. Pagnanini, F. Petricca, S. Pirrò, F. Pröbst, G. Profeta, A. Puiu, F. Reindl, K. Schäffner, J. Schieck, D. Schmiedmayer, C. Schwertner, M. Stahlberg, A. Stendahl, M. Stukel, F. Wagner, S. Yue, V. Zema, Y. Zhu

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Abstract

The increasing statistical significance of the DAMA/LIBRA annual modulation signal is a cause for tension in the field of dark matter direct detection. The COSINUS experiment aims at a model-independent cross-check of the DAMA/LIBRA signal claim, using NaI crystals operated as cryogenic scintillating calorimeters at millikelvin temperatures. Such a setup enables measurement of phonon and scintillation light signals via Transition Edge Sensors (TESs) and allows particle discrimination on an event-by-event basis. The non-standard properties of NaI cause an obstacle when attaching a TES directly onto the surface of the crystal. This can be overcome with the "remoTES" design, where the TES is attached to an external wafer crystal. We present the results from a first successful operation of NaI and other crystals as cryogenic calorimeters with the remoTES design.

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remoTES: COSINUS实验中低温NaI探测器的新设计

DAMA/LIBRA年度调制信号的统计显著性不断提高，是暗物质直接探测领域紧张的原因之一。COSINUS实验旨在对DAMA/LIBRA信号声明进行模型无关的交叉检查，使用NaI晶体作为毫开尔文温度下的低温闪烁量热计。这样的设置可以通过过渡边缘传感器(TESs)测量声子和闪烁光信号，并允许在逐个事件的基础上进行粒子识别。当将TES直接附着在晶体表面时，NaI的非标准特性会造成障碍。这可以通过“remoTES”设计来克服，其中TES连接到外部晶圆晶体上。我们介绍了第一次成功操作的结果，NaI和其他晶体作为低温量热计与遥控设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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