Japan Geoscience Union Meeting 2021

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[J] Poster

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[O-07] Poster presentations by senior high school students

Sun. Jun 6, 2021 1:45 PM - 3:15 PM Ch.27

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

1:45 PM - 3:15 PM

[O07-P66] Detection of Cherenkov light with acrylic and photodetecto

*Juri Urano1, *Yuka Kuze1, *Kaho Kubota1 (1.Toshimagaoka Joshigakuen senior high school)

Keywords:Cosmic Rays

We detected Cherenkov light with a handmade cosmic-ray detector so-called "Cosmic Watch". Cherenkov light is observed when cosmic ray goes through the substances which have a large refractive index. In this research, we used acrylic (4 cm * 4 cm * 20 cm). We flattened the surface of the acrylic with some pieces of sandpaper and abrasive to improve the transmission of the Cherenkov light to the photodetector sensor. We covered the acrylic with aluminum foil and black plastic tape to shading and shielding from electrical noise and light leakage. We put another Cosmic Watch with a plastic scintillator on the Cosmic Watch with acrylic and measured signal coincidences to prevent noise detection.

In this research, we succeeded in detecting a Cherenkov light in a certain condition. We would like to optimize for detection of Cherenkov light by changing conditions like material or its size.