Jun 2 – 7, 2019
Carnegie Mellon University
America/New_York timezone

## Current Status of the LEPS2 Experiment and Commissioning of the Solenoid Spectrometer

Jun 4, 2019, 2:00 PM
30m
Rangos 3

### Rangos 3

Contributed Future Facilities and Directions

### Speaker

Dr Sun Young Ryu (Osaka University)

### Description

We report recent beam commissioning results of the LEPS2 solenoid spectrometer at SPring-8. The LEPS2 spectrometer is primarily designed for high-statistics experimental confirmation or exclusion of the $\Theta^+$ with a large angular acceptance, and also for unveiling the hadronic structures of the $\Lambda(1405)$ and other exotic baryon systems. A large time-projection chamber (TPC) is a main tracking device for providing almost 4$\pi$ angular acceptance and 1% momentum resolution. Four drift chambers are placed downstream of the TPC for tracking charged particles at forward angles. Forward and barrel resistive plate chamber (RPC) arrays provide us with trigger and timing information. Cherenkov detector arrays cover the large polar angle region for $\pi/K$ identification. For the LEPS2 experiments, we have developed a new, network-distributed data acquisition system based on the DAQ middleware. During the beam commissioning and the first physics run, Compton back-scattered photon beam was incident on a CH2 target in the energy region from 1.4 GeV to 2.4 GeV. We will report on preliminary results of beam commissioning of the LEPS2 spectrometer with a special emphasis on the performance of the new DAQ system.