Pressure dependence of X-rays produced by an LiTaO3 single crystal at the pressures of 1–20 Pa

Abstract

The energy spectra of X-rays produced by an LiTaO3 single crystal have been measured at pressures of 1–20Pa. The energy spectra showed that the endpoint energy and the amount of X-rays gradually increased with the decrease of pressure at 5–8Pa and abruptly increased around 4Pa and below. A maximum endpoint energy of 70keV was obtained using the LiTaO3 single crystal with 5mm thickness at a pressure of 3Pa. The change of X-rays produced by the LiTaO3single crystal was discussed in relation to the breakdown potential at the pressures.