Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Takaku, Ryota"'
Autor:
Monelli, Marta, Komatsu, Eiichiro, Ghigna, Tommaso, Matsumura, Tomotake, Pisano, Giampaolo, Takaku, Ryota
Publikováno v:
JCAP05(2024)018
Polarization of the cosmic microwave background (CMB) can help probe the fundamental physics behind cosmic inflation via the measurement of primordial $B$ modes. As this requires exquisite control over instrumental systematics, some next-generation C
Externí odkaz:
http://arxiv.org/abs/2311.07999
Autor:
Sugiyama, Shinya, Ghigna, Tommaso, Hoshino, Yurika, Katayama, Nobuhiko, Katsuda, Satoru, Komatsu, Kunimoto, Matsumura, Tomotake, Sakurai, Yuki, Sato, Kosuke, Takaku, Ryota, Tashiro, Makoto, Terada, Yukikatsu
Publikováno v:
Journal of Low Temperature Physics (2022): 1-9
We measured the vibration of a prototype superconducting magnetic bearing (SMB) operating at liquid nitrogen temperature. This prototype system was designed as a breadboard model for LiteBIRD low-frequency telescope (LFT) polarization modulator unit.
Externí odkaz:
http://arxiv.org/abs/2210.13219
Testbed preparation of a small prototype polarization modulator for LiteBIRD low-frequency telescope
Autor:
Hoang, Thuong D., Matsumura, Tomotake, Takaku, Ryota, Hasebe, Takashi, Ghigna, Tommaso, Katayama, Nobuhiko, Sakurai, Yuki, Komatsu, Kunimoto, Iida, Teruhito, Hoshino, Yurika, Sugiyama, Shinya, Ishino, Hirokazu
LiteBIRD is the Cosmic Microwave Background (CMB) radiation polarization satellite mission led by ISAS/JAXA. The main scientific goal is to search for primordial gravitational wave signals generated from the inflation epoch of the Universe. LiteBIRD
Externí odkaz:
http://arxiv.org/abs/2208.03673
Autor:
Ghigna, Tommaso, Matsumura, Tomotake, Sakurai, Yuki, Takaku, Ryota, Komatsu, Kunimoto, Sugiyama, Shinya, Hoshino, Yurika, Katayama, Nobuhiko
Most upcoming CMB experiments are planning to deploy between a few thousand and a few hundred thousand TES bolometers in order to drastically increase sensitivity and unveil the B-mode signal. Differential systematic effects and $1/f$ noise are two o
Externí odkaz:
http://arxiv.org/abs/2208.02952
Autor:
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
Publikováno v:
Proc.SPIE Int.Soc.Opt.Eng. 12190 (2022) 1107
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 i
Externí odkaz:
http://arxiv.org/abs/2207.13292
Autor:
Takaku, Ryota, Wen, Qi, Cray, Scott, Devlin, Mark, Dicker, Simon, Hanany, Shaul, Hasebe, Takashi, Iida, Teruhito, Katayama, Nobuhiko, Konishi, Kuniaki, Kuwata-Gonokami, Makoto, Matsumura, Tomotake, Mio, Norikatsu, Sakurai, Haruyuki, Sakurai, Yuki, Yamada, Ryohei, Yumoto, Junji
Publikováno v:
Optics Express (2021), Volume 29, #25/6, Pg 41745
We fabricated a 302 mm diameter low-pass filter made of alumina that has an anti-reflection coating (ARC) made with laser-ablated sub-wavelength structures (SWS). The filter has been integrated into and is operating with the MUSTANG2 instrument, whic
Externí odkaz:
http://arxiv.org/abs/2109.15319
Autor:
Wen, Qi, Fadeeva, Elena, Hanany, Shaul, Koch, Jürgen, Matsumura, Tomotake, Takaku, Ryota, Young, Karl
Publikováno v:
Optics & Laser Technology, Volume 142, October 2021, 107207
We use a 1030 nm laser with 7 ps pulse duration and average power up to 100 W to ablate pyramid-shape subwavelength structures (SWS) on alumina and sapphire. The SWS give an effective and cryogenically robust anti-reflection coating in the millimeter
Externí odkaz:
http://arxiv.org/abs/2103.06974
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Autor:
Zmuidzinas, Jonas, Gao, Jian-Rong, Lam, Rex, Cray, Scott, Firth, Calvin, Hanany, Shaul, Koch, Jürgen, Konishi, Kuniaki, Matsumura, Tomotake, Sakurai, Yuki, Sakurai, Haruyuki, Takaku, Ryota, Yan, Andrew
Publikováno v:
Proceedings of SPIE; August 2024, Vol. 13102 Issue: 1 p131022N-131022N-7, 1179206p
Autor:
Zmuidzinas, Jonas, Gao, Jian-Rong, Aizawa, Kosuke, Akizawa, Ryosuke, Cray, Scott, Hanany, Shaul, Koch, Jürgen, Konishi, Kuniaki, Matsumura, Tomotake, Sakurai, Haruyuki, Takaku, Ryota
Publikováno v:
Proceedings of SPIE; August 2024, Vol. 13102 Issue: 1 p131021Z-131021Z-14, 12971094p