Speaker
Description
We are developing a thin plastic scintillator with multiple MPPCs for high-rate and low energy particle experiments at RCNP. The ongoing project is mainly for Large Acceptance Spectrometer at RCNP, but these detector systems for high-rate experiments can be applicable to RIBF facilities.
The main purpose of this detector system is to quantify proton-neutron pair correlation. Since the main reaction of ($\alpha$, $^6$Li) contains both isoscalar ($T = 0$) and isovector ($T = 1$) components, to extract isovector component from main reaction of ($\alpha$, $^6$Li), (d, $\alpha$) reactions will also be measured. Due to the small cross-section of the main reaction, increasing the counting rate to 6 Mcps will contribute to reducing the experiment time. Under these conditions, the pile-up is one of the main problems. To address this issue, a thin plastic scintillator with multiple MPPCs on top and bottom will be useful because low material budget will contribute to reducing energy loss, and multiple MPPCs on top and bottom will contribute to increasing light dynamic range and multi-hit tolerance.
In this poster, I will discuss the charge, timing and position resolutions based on Geant4 simulations.