Heavy ion beam pumped visible laser

Abstract

Heavy ion beam pumped laser action was observed in the visible spectral range. This result is encouraging for the potential development of shorter wavelength lasers pumped by heavy ion beams. The laser operated on the 585.25-nm neon line in He-Ne-Ar, He-Ne-Kr, and He-Ne-Xe mixtures. The laser gas pressure was, typically, 800 hPa and the mixing ratio 92% He, 6% Ne, and 2% Ar (Kr,Xe). Quasicontinuous laser action was obtained using a chopped beam of 120-MeV 35 Cl ions for pumping. Preliminary spectroscopic studies of the laser medium show selective excitation of the 585.25-nm line.

Accurate Estimation of Carotid Luminal Surface Roughness Using Ultrasonic Radio-Frequency Echo

“…Nozzle expansion has already been suggested for excimer laser pumping [3] but, since the pumping power requirements are high, especially for the broad band VUV transitions of the pure rare gases, no laser effect has been observed in such systems, so far. Energy transfer from the excimer molecules to narrow atomic laser lines in the infrared and visible spectral regions, which has been demonstrated successfully using heavy-ion-beam pumping with low threshold pumping power densities [19] may therefore be a first step towards demonstrating laser effects using a fast electrical excitation and subsequent nozzle expansion of rare gas mixtures. Figure 1 is the energy-level diagram of atomic and molecular states of argon, krypton and xenon related to this work.…”

Electron beam induced light emission

“…A 12 kV, 2 A electron gun will be used for shorter wavelength experiments and a 585 nm He-Ne laser (laser system as in ref. [21]) has already been successfully operated with this device. With on the order of 20 MW/cm 3 which is thereby produced in the heavier rare gases, potential laser operation of the UV and VUV excimer lasers will be studied.…”

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.…”