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Buffer gas
About: Buffer gas is a research topic. Over the lifetime, 3565 publications have been published within this topic receiving 47283 citations.
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TL;DR: It is found that the use of helium results in the highest fluorescence signal, while no fluorescence was detected when using argon under the same conditions.
15 citations
Patent•
26 Feb 2010
TL;DR: In this paper, the authors propose a fluorine gas supply system for semiconductor processing devices in a large quantity and in a precise concentration, where a mixed gas stored in a buffer tank is introduced into a gas introducing pipeline before the mixed gas is adjusted in the buffer tank.
Abstract: [Task] It is a task to provide a fluorine gas supply system which can stably supply fluorine gas generated by a fluorine gas generation device to a semiconductor processing device in a large quantity and in a precise concentration. [Means for solving task] In the fluorine gas supply system, a mixed gas stored in a buffer tank is introduced into a gas introducing piping before the mixed gas is adjusted in the buffer tank to circulate the mixed gas and a monitoring device is disposed which measures a fluorine gas concentration within the mixed gas so that, in response to the obtained fluorine gas concentration, a flow quantity of inert gas supply source can be adjusted.
15 citations
TL;DR: In this paper, the operating characteristics of transversely excited double-pulse copper bromide lasers employing discharge stabilization techniques are reported. But the authors do not consider the effect of temperature and gas pressure on the characteristic delay times.
Abstract: Detailed operating characteristics of transversely excited (TE) double-pulse copper bromide lasers employing discharge stabilization techniques are reported. With careful optimization of operating temperature, buffer gas pressure, dissociation and excitation energies, and pulse delay times, specific output energies up to 35μJ/cm3have been obtained for a device of active volume 150 cm3. The nature of the dominant processes influencing ground state and metastable copper atom densities in the interpulse region are discussed in terms of the observed effects of temperature and gas pressure on the characteristic delay times.
15 citations
TL;DR: In this paper, a selfconsistent model of a self-sustained discharge XeCl laser with He buffer gas is described, and the validity of the model is confirmed by comparing the results with the measured time dependences of electrical variables, the lasing pulse, the densities of xeCl*, Cl-, Xe* as well as with the dependences on the laser output energy on the charging voltage and on the gas composition.
Abstract: A self-consistent model of a self-sustained discharge XeCl laser with He buffer gas is described. The validity of the model is confirmed by comparing the results with the measured time dependences of electrical variables, the lasing pulse, the densities of XeCl*, Cl-, Xe* as well as with the dependences of the laser output energy on the charging voltage and on the gas composition. For a gas pressure of 2.2 atm model optimisation of the energy density deposition and the length of the laser active medium (for a fixed stored energy of 7 J) is carried out. The quenching of XeCl* molecules by electrons is found to be the main factor limiting the enhancement of laser efficiency and output energy when the deposited energy density increases.
15 citations
TL;DR: In this paper, a technique known as quenching using a molecular buffer gas which allows near-perfect spin-polarisation of over in caesium vapour at high optical depths of up to a factor of 4 higher than can be achieved without quenched.
Abstract: Raman interactions in alkali vapours are used in applications such as atomic clocks, optical signal processing, generation of squeezed light and Raman quantum memories for temporal multiplexing. To achieve a strong interaction the alkali ensemble needs both a large optical depth and a high level of spin-polarisation. We implement a technique known as quenching using a molecular buffer gas which allows near-perfect spin-polarisation of over in caesium vapour at high optical depths of up to a factor of 4 higher than can be achieved without quenching. We use this system to explore efficient light storage with high gain in a GHz bandwidth Raman memory.
15 citations