Optical Measurements on Spallation Neutron Source Targets and Fusion Devices

摘要

An optical strain measurement system was successfully developed to measure transient strains of amercury target vessel in an intense radiation environment. In this measurement system, the fiber-opticFabry-Perot sensors are used as strain gages. This strain measurement system works well to measurestrains ranging from 1 to 1000 microstrains of a target vessel in intense electric fields and magneticfields or X-ray and gamma-ray radiation. In addition, phosphor thermometry (PT) was developed formeasuring surface temperatures of mercury and galvanneal steel. The PT technique is being chosen formeasuring surface temperatures of liquid-metal jets or sheets for fusion devices. This paper describessuch optical measurements and discusses potential applications.