Oct 3 – 7, 2022
Science Culture Center, IBS
Asia/Seoul timezone

Development of a fast response PPAC for high-intensity heavy-ion beams

Oct 4, 2022, 7:20 PM
S236 (Science Culture Center, IBS)


Science Culture Center, IBS

55 EXPO-ro, Yuseong-gu, Daejeon
Poster Session Poster Session


Shutaro Hanai (CNS, the University of Tokyo)


Parallel Plate Avalanche Counter (PPAC) is generally used as beam-line detectors for position measurements in RI beam facilities. A delay-line PPAC, a conventional type of PPAC deduces the position of particles using the time difference of signals from both ends of electrodes connecting a delay line. However, there is a limit on the counting rates due to the multi-hitting within the delay time. We have developed a Strip-Readout PPAC (SR-PPAC) with two cathode planes for positions X and Y with strip electrodes. By separately reading out from each electrode detection efficiency has been achieved near 100 % even for high-intensity beams much more than 10^5 cps.

We have tested SR-PPAC in accelerator facilities and evaluated the detection efficiency and the position resolution. The detection efficiency was more than 99% even for a 700 kHz RI beam and the position resolution achieved about 300 $\mu$m(FWHM), which is comparable to Multi-Wire Drift Chamber.

Primary author

Shutaro Hanai (CNS, the University of Tokyo)


Prof. Shinsuke Ota (RCNP, Osaka University) Mrs Reiko Kojima (CNS, the University of Tokyo) Prof. Nobuaki Imai (CNS, the University of Tokyo) Prof. Shin'ichiro Michimasa (CNS, the University of Tokyo) Prof. Susumu Shimoura (CNS, the University of Tokyo) Prof. Juzo Zenihiro (Kyoto University) Mr Yuto Hijikata (Kyoto University) Prof. Masanori Dozono (Kyoto University)

Presentation materials