Speaker
Description
Cluster knockout reaction in inverse kinematics is a direct probe to study cluster formation in nuclei. We have previously developed a silicon detector system optimized for measuring recoil protons emitted in such reactions, achieving high-precision data acquisition using APV25-S1 readout chips.
In this study, we newly developed trapezoidal silicon detectors capable of detecting emitted cluster particles (primarily alpha particles) with high efficiency and resolution. This enables simultaneous measurements of energies and angles, allowing for the reconstruction of the cluster separation energy. The detectors form a component of the TOGAXSI (TOtal energy measurement by GAgg and verteX measurement by SI strips) telescope system, in combination with GAGG(Ce) scintillators.
The detector adopts a double-layer strip structure with a thickness of 100 μm and a strip pitch of 100 μm, achieving an angular resolution better than 2 mrad. It covers a wide energy-loss range (25–650 keV), enabling simultaneous detection of particles from protons to alpha particles.
In addition, by incorporating flexible circuits, the detector achieves a larger solid-angle coverage than previous designs.
A test experiment is scheduled for June 2025 at the RI beam factory to evaluate the performance of these silicon detectors. This poster will report on the detector design, readout system, and preliminary performance evaluation.
| Supervisor's Name | Junki Tanaka |
|---|---|
| Supervisor's email | junki@rcnp.osaka-u.ac.jp |
| Classification | Instrumentation for radioactive ion beam experiments |
