Summary

• Principle was confirmed by 1st Beam test and now we study the detector for it’s improvement and real application.

• 2nd Beam test was performed with improved Aerogel, PMT, and readout system and preliminary results were shown. We improved the understanding of the detector; reasonable enhancement of Npe with better Aerogel optical quality was seen.

• R&D for mass production of Aerogel and PMT under Mag netic Field (multi-anode H(A)PD) is undergoing.