EMIS 2022 at RAON

Development of large GAGG:Ce calorimeter for measurements of the cluster knockout reactions

4 Oct 2022, 18:24

8m

S236 (Science Culture Center, IBS)

Poster Session Poster Session

Speaker

Ryotaro Tsuji (Department of Physics, Kyoto university)

Description

We have launched the “ONOKORO” project to understand cluster formation phenomena in nuclei and nuclear matter from measurements of the cluster knockout reactions (($p$,$p$X) reactions(X=$d$, $t$, ${}^3\mathrm{He}$, $\alpha$)).

In order to measure the reactions using inverse-kinematics, we have developed the “TOGAXSI” telescope consisting of Si trackers and large GAGG:Ce calorimeters. The required performance of the calorimeter is high energy resolution(~1$A$ MeV (rms)) under the high count rate (~100 kcps) and wide energy range (100$A$-250$A$ MeV).Therefore, we have developed new calorimeter using large GAGG:Ce crystal(35 mm $\times$ 35 mm $\times$ 120 mm) which is high resolution(8~9 % (662 keV, FWHM)), high density (~6.63 g/cm${}^3$) and fast response(decay time~90 ns).

In this presentation, we report recent results of the performance test with proton and $\alpha$ beam at HIMAC, QST.