Results 21 to 30 of about 3,313,131 (376)
The influence of the reactor pressure on the hydrodynamics in a cocurrent gas-liquid trickle-bed reactor [PDF]
, 1990 The influence of the reactor pressure on the liquid hold-up in the trickle-flow regime and on the transition between trickle-flow and pulse-flow has been investigated in a trickle-flow column operating up to 6.0 MPa with water, and nitrogen or helium as ...
Wammes, W.J.A., Westerterp, K.R.
core +3 more sources
Key mechanistic features of swelling and blistering of helium-ion-irradiated tungsten [PDF]
, 2019 Helium-ion-induced swelling and blistering of single-crystal tungsten is investigated using a Helium Ion Microscope for site-specific dose-controlled irradiation (at 25 keV) with analysis by Helium Ion Microscopy, Atomic Force Microscopy and Transmission
Allen, FI, Balooch, M, Hosemann, P
core +2 more sources
X-rays from antiprotonic helium in helium gas [PDF]
Nuclear Physics A, 1982 Abstract X-ray transitions to the 4F, 3D, and 2P atomic levels of pHe have been observed with antiprotons stopped in He gas at 4 and 1.1 atm NT. The population by radiative transitions of the 3D level in gas Y M (4 atm ) = (28±14)% and Y M (1.1 atm ) = (43±22)% exceeds by more than one order of magnitude that measured in liquid He.
R.W. Wodrich +13 more
openaire +1 more source
Frontiers in Earth Science, 2022 Helium is a strategic resource with many scientific, technical and industrial applications. However, despite its importance and scarcity, there is a lack of understanding on its origin, migration and accumulation processes.
Shengfei Qin +3 more
doaj +1 more source
Journal of Natural Gas Geoscience, 2017 Crust-derived helium is generated from the radioactive decay of uranium, thorium and other radioactive elements in geological bodies. Compared with conventional natural gas, helium is a typical weak source gas as a result of extremely slow generation ...
Yuhong Li +5 more
doaj +1 more source
Three-dimensional kinetic modeling of streamer propagation in a nitrogen/helium gas mixture
Plasma Sources Science & Technology, 2018 A fully resolved kinetic model (particle-in-cell and direct simulation Monte Carlo for particle/photon collisions) of a near atmospheric pressure ionization wave is presented here.
A. Fierro, C. Moore, B. Yee, M. Hopkins
semanticscholar +1 more source
Helium Ionization in the Diffuse Ionized Gas surrounding UCHII regions [PDF]
, 2017 We present measurements of the singly ionized helium to hydrogen ratio ($n_{He^+}/n_{H^+}$) toward diffuse gas surrounding three Ultra-Compact HII (UCHII ) regions: G10.15-0.34, G23.46-0.20 \& G29.96-0.02.
Anderson, L. D. +2 more
core +3 more sources
Pulsed extraction of ionization from helium buffer gas [PDF]
, 2008 The migration of intense ionization created in helium buffer gas under the influence of applied electric fields is considered. First the chemical evolution of the ionization created by fast heavy-ion beams is described.
Beaty +34 more
core +1 more source
High-Performance Polybenzimidazole Membranes for Helium Extraction from Natural Gas
ACS Applied Materials and Interfaces, 2019 Increasing helium use in research and production processes necessitates separation techniques to secure sufficient supply of this noble gas. Energy-efficient helium production from natural gas is still a big challenge.
Xuerui Wang +6 more
semanticscholar +1 more source
Powering of an HTS dipole insert-magnet operated standalone in helium gas between 5 and 85 K
, 2018 This paper describes the standalone magnet cold testing of the high temperature superconducting (HTS) magnet Feather-M2.1-2. This magnet was constructed within the European funded FP7-EUCARD2 collaboration to test a Roebel type HTS cable, and is one of ...
J. Nugteren +34 more
semanticscholar +1 more source