High-pressure radiation-chemical laser initiated by a fastelectron beam from a coaxial high-voltage diode

Abstract

We discuss different types of measurements targetting the interplay of mechanical motion with electrical transport in suspended single-wall carbon nanotube devices. In driven resonator experiments, the transversal acoustical vibration mode is detected and identified at room temperature using ac down-mixing techniques. In contrast, low-temperature transport spectroscopy enables the observation of the longitudinal acoustic mode in the quantum limit in single electron tunnelling. This vibrational excitation can also be observed in higher order tunnelling current for appropriate electronic coupling to the leads. Experimental roads towards the quantum limit of the transversal vibration mode-as ultimate quantum-limited beam resonator-are explored, e.g. extending both abovementioned measurement techniques. References 12

Influence of water vapour impurities on the atomic Xe laser

“…Direct conversion of nuclear energy to laser radiation was considered as early as 1961 [1]. Nuclear pumped lasers (NPLs) have been intensively studied and developed in the USA and Russia since the first operation of a He-Xe NPL in 1972 [2,3]. In particular, laser operation on the 1.73 µm transition in Xe atoms has been studied extensively.…”

“…It is one of the most promising NPLs in the IR region for high-power applications [4]. This laser has a high efficiency (maximum 8%) [5][6][7] and a low threshold [1,8]. It is a potentially high-energy (up to 50 kJ) NPL with pulse lengths of ∼10 ms [9].…”

“…Laser oscillation is observed for gas mixtures of Xe with other inert gases (He, Ar, Kr). Many experiments have been performed on the 1.73 µm line of Xe using an Ar(99.5%)-Xe(0.5%) gas mixture with total pressures ranging from 0.5 to 4 atm [1][2][3][4][5][6][7][8][9][10][11].…”