Abstract
A nanosecond LED ligh pulse similar to the ruby laser light was used to calibrate a ruby laser Thomson scattering device. The continuous spectral region between 5500Å and 7000 Å was obtained using two different kinds of LED element. The calibration data was obtained within 1-2% fluctuation in the repeated experiments, and the uncertainty in the relative sensitivity calibration constant was below 2%. The following results were obtained using the nanosecond light source: The width of the light pulse was scarcely changed during the pulse's passage through the optics and electronics. The transmission time from entering the fiber optic system to entring the data acquisition system was determined in order to minimize the gate duration.