Abstract
Neutron detector systems are key to the success of high power pulsed spallation neutron sources like JSNS and SNS. We organized many small meetings to discuss about neutron detector systems for the instruments at JSNS, especially about requirements and candidates. Detector developers summarized specifications of detector systems that are available now or under development, and discussed about the requirements and candidates with neutron instrument designers. At the first stage, we will employ improved versions of conventional-detector systems such as He-3 gas linear position sensitive detector and improved version of the ZnS scintillation detector systems developed at ISIS. We will continue R&D's to develop high performance detector systems, such as MSGC/MPGC, MSGC in a gas tube and various scintillation based detector systems. Our plan is to add such high performance detector systems at a later time to the instruments.