The use of silica as insulators and windows in thermonuclear facilities is pretty widespread. The silica grids are one of the main parts of secondary emission radioisotope source of current (SERIC). The properties of silica grid have an influence on work of this device. Nondestructive monitoring of this property changing is one of the most important tasks of radiation physics. The ionoluminescence spectra of quartz changed essentially during proton irradiation [1]. Based of these dates the novel method was proposed for monitoring proton dose in SiO₂. The changing of ionoluminescence angular characteristics under ion irradiation with some MeV energy was obtained also [2]. In our work, we studied angular and spectral characteristics of ionoluminescence of silica during light ion bombardment.
The measurements were carried out using the light ions with energy from 210 to 420 KeV. The wavelength range of ionoluminescence studies was from 400 to 700 nm. Incident and detection angles changed from 20° to 70°.
The typical spectra of nonimplanted silica ionoluminescence under ion bombardments consist of two wide bands. It was defined that irradiation process of quartz brought into shape changes of optical spectra. These changes in the spectra were due to accumulation of defects and interaction of implanted ions with ones. It was found that shape of light-spectrum was not defined on detection angles as absorption dose exceeded 5 × 10²⁰ particles/cm³. Both the shape of silica ionoluminescence spectra and its angular characteristics were determined by density of implanted ions, when absorption dose less then 5 × 10²⁰ particles/cm³. The possibility of application of these results for remote monitoring of dose that quartz accumulated was shown.

References