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19–24 Oct 2025
Chateau Fairmont Whistler
America/Vancouver timezone

Challenges and performance evaluation of a calorimeter using over 100 GAGG crystals for intermediate-energy experiments

21 Oct 2025, 19:36
1m
MacDonald Foyer (Fairmont Chateau Whistler)

MacDonald Foyer

Fairmont Chateau Whistler

Poster contribution Instrumentation for radioactive ion beam experiments Poster Session

Speaker

Taiki Sugiyama (RIKEN / Saitama univ.)

Description

Cluster formation is a fundamental phenomenon in nuclear physics and is crucial for understanding nuclear structure and dynamics. To study cluster formation in nuclei, we use quasi-free knockout reactions with a proton probe to directly measure clusters formed in the nucleus. This approach, combined with inverse kinematics, allows measurements over a wide range of nuclei.
To implement this method, we are constructing a TOGAXSI telescope consisting of a silicon strip tracker and a calorimeter made of GAGG(Ce) scintillators. GAGG(Ce) is particularly suitable for (p, pX) reaction measurements due to its high density, fast response, high light output, and non-hygroscopic properties. The TOGAXSI telescope consists of over 100 large GAGG(Ce) crystals.
We have encountered challenges in the energy calibration and mass integration of the GAGG(Ce) crystals. We performed inverse-kinematics cluster-knockout measurements at RIKEN RIBF using TOGAXSI. In this talk, we will report on the development status and performance evaluation of the GAGG(Ce) calorimeter based on the insights obtained through this experiment.

Email address taiki.sugiyama@riken.jp
Supervisor's Name Tomohiro Uesaka
Supervisor's email uesaka@riken.jp
Funding Agency JSPS
Classification Instrumentation for radioactive ion beam experiments

Primary author

Taiki Sugiyama (RIKEN / Saitama univ.)

Co-authors

Yuki Kubota (RIKEN Nishina Center) Tomohiro Uesaka (RIKEN) Yosuke Kondo (Riken) Shunpei Koyama (Riken) Junki Tanaka (Research Center for Nuclear Physics) Juzo Zenihiro (Kyoto) Ryotaro Tsuji (Kyoto Univ.) Takayuki Yano (Kyoto University) Yuto Hijikata (Riken, Nishina-Center) Tomoya Nakada (Kyoto Univ.) Akane Sakaue (RIKEN and Center for Nuclear Study, the University of Tokyo) Kenjiro Miki (Tohoku University) Hidetada Baba (RNC, RIKEN) ONOKORO collaboration

Presentation materials

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