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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: In this paper, a pulsed chemical oxygen-iodine laser with a volume production of atomic iodine in a transverse electric discharge was studied, where an increase in the partial oxygen pressure was shown to increase the pulse energy with retention of the pulse duration.
Abstract: A pulsed chemical oxygen — iodine laser with a volume production of atomic iodine in a pulsed transverse electric discharge is studied. An increase in the partial oxygen pressure was shown to increase the pulse energy with retention of the pulse duration. At the same time, an increase in the iodide pressure and the discharge energy shortens the pulse duration. Pulses with a duration of 6.5 μs were obtained, which corresponds to a concentration of iodine atoms of 1.8 × 1015 cm-3. This concentration is close to the maximum concentration attained in studies of both cw and pulsed oxygen-iodine lasers. A specific energy output of 0.9 J litre-1 and a specific power of 75 kW litre-1 were obtained. The ways of increasing these parameters were indicated. It was found that SF6 is an efficient buffer gas favouring improvements in the energy pulse parameters.
17 citations
TL;DR: In this paper, the authors provide a comprehensive theoretical framework for describing the dynamics of a single trapped ion interacting with a neutral buffer gas, thus extending their previous studies on buffer-gas cooling of ions beyond the critical mass ratio.
Abstract: We provide a comprehensive theoretical framework for describing the dynamics of a single trapped ion interacting with a neutral buffer gas, thus extending our previous studies on buffer-gas cooling of ions beyond the critical mass ratio [B. H\"oltkemeier et al., Phys. Rev. Lett. 116, 233003 (2016)]. By transforming the collisional processes into a frame, where the ion's micromotion is assigned to the buffer-gas atoms, our model allows us to investigate the influence of nonhomogeneous buffer-gas configurations as well as higher multipole orders of the radio-frequency trap in great detail. Depending on the neutral-to-ion mass ratio, three regimes of sympathetic cooling are identified which are characterized by the form of the ion's energy distribution in equilibrium. We provide analytic expressions and numerical simulations of the ion's energy distribution, spatial profile, and cooling rates for these different regimes. Based on these findings, a method for actively decreasing the ion's energy by reducing the spatial expansion of the buffer gas arises (forced sympathetic cooling).
17 citations
Patent•
22 Apr 2010TL;DR: In this paper, a system, in certain embodiments, includes a seal assembly having a seal body including an inlet buffer port and an outlet eduction port, which is configured to receive a compressed buffer gas, such as shop air, injected into the buffer port.
Abstract: A system, in certain embodiments, includes a seal assembly having a seal body The seal body includes an inlet buffer port and an outlet eduction port The inlet buffer port is configured to receive a compressed buffer gas, such as shop air, which is injected into the inlet buffer port The compressed buffer gas blocks the flow of a compressed process gas, such as land fill gas, by opposing the flow of the compressed process gas through the seal assembly Both the compressed buffer gas and the compressed process gas may be expelled through the outlet eduction port
17 citations
Patent•
03 Dec 1979TL;DR: In this paper, an inert buffer gas is introduced into a narrow sealing slit defined between a pair of upper and lower sealing members adjacent the oven opening to buffer the oven gas leakage.
Abstract: A non-contact seal for thin film treating ovens to prevent leakage of gas both into and out of the oven at the film entry and exit points. An inert buffer gas is introduced into a narrow sealing slit defined between a pair of upper and lower sealing members adjacent the oven opening to buffer the oven gas leakage. An eductor passage also communicates with the sealing slit to carry away gas leakage resulting from thermal diffusion. Apparatus for precisely adjusting the height of the sealing slit to compensate for various film thicknesses and widths are provided. The temperature of the sealing members is regulated by the circulation of a fluid within passageways provided therein, thus to prevent thermal distortions of the slit defining surfaces.
17 citations
25 Jun 2009
TL;DR: The first book on ultracold molecules is as mentioned in this paper, which is based on the work of Campbell, WC; Doyle, JM; and Stwalley, WC, and Friedrich, B.
Abstract: Author(s): Campbell, WC; Doyle, JM | Editor(s): Krems, RV; Stwalley, WC; Friedrich, B | Abstract: The First Book on Ultracold Molecules Cold molecules offer intriguing properties on which new operational principles can be based (e.g., quantum computing) or that may allow researchers to study a qualitatively new behavior of matter (e.g.
17 citations