Testing magnetic interference between TES detectors and the telescope environment for future CMB satellite missions
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2022
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| author | Ghigna, Tommaso Hoang, Thuong Duc Hasebe, Takashi Hoshino, Yurika Katayama, Nobuhiko Komatsu, Kunimoto Lee, Adrian Matsumura, Tomotake Sakurai, Yuki Sugiyama, Shinya Suzuki, Aritoki Raum, Christopher Takaku, Ryota Westbrook, Benjamin |
| author_facet | Ghigna, Tommaso Hoang, Thuong Duc Hasebe, Takashi Hoshino, Yurika Katayama, Nobuhiko Komatsu, Kunimoto Lee, Adrian Matsumura, Tomotake Sakurai, Yuki Sugiyama, Shinya Suzuki, Aritoki Raum, Christopher Takaku, Ryota Westbrook, Benjamin |
| contents | The two most common components of several upcoming CMB experiments are large arrays of superconductive TES (Transition-Edge Sensor) detectors and polarization modulator units, e.g. continuously-rotating Half-Wave Plates (HWP). A high detector count is necessary to increase the instrument raw sensitivity, however past experiments have shown that systematic effects are becoming one of the main limiting factors to reach the sensitivity required to detect primordial $B$-modes. Therefore, polarization modulators have become popular in recent years to mitigate several systematic effects. Polarization modulators based on HWP technologies require a rotating mechanism to spin the plate and modulate the incoming polarized signal. In order to minimize heat dissipation from the rotating mechanism, which is a stringent requirement particularly for a space mission like $LiteBIRD$, we can employ a superconductive magnetic bearing to levitate the rotor and achieve contactless rotation. A disadvantage of this technique is the associated magnetic fields generated by those systems. In this paper we investigate the effects on a TES detector prototype and find no detectable $T_c$ variations due to an applied constant (DC) magnetic field, and a non-zero TES response to varying (AC) magnetic fields. We quantify a worst-case TES responsivity to the applied AC magnetic field of $\sim10^5$ pA/G, and give a preliminary interpretation of the pick-up mechanism. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_13292 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Testing magnetic interference between TES detectors and the telescope environment for future CMB satellite missions Ghigna, Tommaso Hoang, Thuong Duc Hasebe, Takashi Hoshino, Yurika Katayama, Nobuhiko Komatsu, Kunimoto Lee, Adrian Matsumura, Tomotake Sakurai, Yuki Sugiyama, Shinya Suzuki, Aritoki Raum, Christopher Takaku, Ryota Westbrook, Benjamin Instrumentation and Methods for Astrophysics Instrumentation and Detectors The two most common components of several upcoming CMB experiments are large arrays of superconductive TES (Transition-Edge Sensor) detectors and polarization modulator units, e.g. continuously-rotating Half-Wave Plates (HWP). A high detector count is necessary to increase the instrument raw sensitivity, however past experiments have shown that systematic effects are becoming one of the main limiting factors to reach the sensitivity required to detect primordial $B$-modes. Therefore, polarization modulators have become popular in recent years to mitigate several systematic effects. Polarization modulators based on HWP technologies require a rotating mechanism to spin the plate and modulate the incoming polarized signal. In order to minimize heat dissipation from the rotating mechanism, which is a stringent requirement particularly for a space mission like $LiteBIRD$, we can employ a superconductive magnetic bearing to levitate the rotor and achieve contactless rotation. A disadvantage of this technique is the associated magnetic fields generated by those systems. In this paper we investigate the effects on a TES detector prototype and find no detectable $T_c$ variations due to an applied constant (DC) magnetic field, and a non-zero TES response to varying (AC) magnetic fields. We quantify a worst-case TES responsivity to the applied AC magnetic field of $\sim10^5$ pA/G, and give a preliminary interpretation of the pick-up mechanism. |
| title | Testing magnetic interference between TES detectors and the telescope environment for future CMB satellite missions |
| topic | Instrumentation and Methods for Astrophysics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2207.13292 |