Optical Seismic Accelerometer Performing at High Temperatures

Using instrumented ovens at Sandia National Lab, we demon- strate that the optical accelerometers developed by MagiQ Technologies can reliably record data at temperatures up to 250°C, and also that they can survive prolonged exposure to high temperatures. The optical accelerometers appear to work equally well at temperatures ranging from 30°C to 250°C. The sensor also totally retained its sensitivity well in excess of 1000 rad/g after spending a week baked at 300°C - roughly equivalent to one month at 250°C.