Neutron imaging test on the GPPD of CSNS

Abstract

A test neutron imaging (NI) system is designed on day-one instrument general purpose powder diffractometer (GPPD) at the China Spallation Neutron Source (CSNS). The conceptual design and neutron beam characteristics of the NI system have been studied, and the neutron flux at the imaging sample position is about $\sim 10^{6}$ n/s/cm2. A filed test of a high resolution test object was performed by using ZnS scintillation screen combined with CCD detector to receive signals, and the spatial resolution is about 100 $\mu$m. The NI system will provide experimental test capabilities of instrument concept, imaging methods and applications.