A Radiation Tolerant Light Pulser for Particle Physics Applications

A light emitting diode (LED) pulser has been developed that can be used for tests or calibration of timing and amplitude sensitivity of particle physics detectors. A comparative study is performed on the components and pulser output characteristics before and after application of 800 MeV protons and cobalt-60 gammas. This device is demonstrated to be tolerant to fluences up to 6.7 $\times$ 10$^{13}$ 800-MeV-p/cm2 and gamma doses up to 5 Mrad.