Optical gain on the 476.5 nm Argon-ion laser line in a gas-target excited by a heavy ion beam

Abstract

Optical gain on the 476.5 nm Ar II 4p-4s ion laser transition has been observed in argon-gas excited by 2.5 ns pulses of 90 MeV 32S ions with a repetition rate of 4883 Hz. The energy per pulse was 23 gJ. The projectiles were stopped in the target at pressures between 5 and 20 kPa. Gain was determined from a measured transient increase of the intensity of a 476.5 nm probe laser beam sent along the ion beam axis and back reflected by an aluminum foil. The maximum gain observed was (0.4_+0.1) x 10 3 at a target-gas pressure of 5 kPa. Control experiments using krypton as target-gas were performed and yielded a null result. The optical gain observed in argon is consistent with the result from an analysis of spectroscopic studies of rare-gas targets excited by heavy ion beams. PACS" 42.55.Hq; 52.20.Hv

Laser effect on the 248nm KrF transition using heavy ion beam pumping

“…Various laser schemes have been studied [4][5][6][7][8], but due to the limited pumping power levels provided by ion accelerators, the wavelength range of ion beam pumped lasers had been limited to the infrared and visible spectral region [9,10]. Short wavelength ion beam pumped lasers may have some applications as special light sources e.g.…”