ELID grinding on the paraboloidal mirror for focusing neutron beam

Abstract

The development of the neutron optical devices is very necessary for the analyses of the material structure. However, the designed form and the surface quality of focusing neutron mirror is a main factor affecting the performance of this device. One of the authors designed a new type of focusing neutron mirror, which form is an inside rotary paraboloid and material is quartz. Its fabrication process was investigated in this experiment. The mirror was first ground applying ELID method with #325 and #1200 cast iron bonding diamond abrasive wheels. Then the ground surface was polished with CeO2 slurry. The finished surface has a very low roughenss and high form accuracy. After coating process, its properties of focusing neutron beam were measured.