R&D Status of Nuclear Emulsion For Directional Dark Matter Search

Understand

In this study, we are doing R&D for directional dark matter search with nuclear emulsion.

• First of all, higher resolution nuclear emulsion with fine silver halide crystals was developed in the production facility of emulsion at Nagoya university, and we confirmed that it can detect the expected nuclear recoil tracks.
• The readout of submicron tracks was required the new technology.
• We developed the expansion technique, and could readout the signal by shape analysis with optical microscopy.