نتایج جستجو برای: predicting gas density
تعداد نتایج: 761424 فیلتر نتایج به سال:
We report on the use of a novel technique to measure the gas density from a pulsed gas jet. Deuterium gas is fully ionized with an intense picosecond laser, and the resulting electron density is measured by interferometric probing with a second picosecond pulse. We have applied this technique to characterize a cryogenically cooled, high-density gas jet.
The influence of outer top gas injection on the scrape-off layer (SOL) density and ion cyclotron range of frequency (ICRF) coupling has been studied in ASDEX Upgrade (AUG) L-mode plasmas for the first time. The three-dimensional (3D) edge plasma fluid and neutral transport code EMC3-EIRENE is used to simulate the SOL plasma density, and the 3D wave code RAPLICASOL is used to compute the ICRF co...
The morphology and kinematics of molecular clouds (MCs) are best explained as the consequence of supersonic turbulence. Supersonic turbulence fragments MCs into dense sheets, filaments, and cores and large low-density ‘‘ voids,’’ via the action of highly radiative shocks. We refer to this process as turbulent fragmentation. In this work we derive the mass distribution of gravitationally unstabl...
Using natural gas is known as a clean energy resource and apart from environmental aspect, it is economically and politically of great importance so that countries having conventional and unconventional gas resources have increased investment in novel tech developments especially in unconventional ones. The aim of this study is to analyze the effect of shale gas production on the gas price in t...
We have studied the molecular and ne structure line emission from dense photodissociation regions (PDRs). In particular, we have concentrated on predicting the line emission from CO and H2 molecules. We nd that, when the gas density is su ciently high relative to the FUV ux (n=G0 102 cm 3), self-shielding of the molecules can move the C+/CO and H/H2 atomic-molecular transitions close to the sur...
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For several years, we have been calculating the radiation drive in laser-heated gold hohlraums using flux-limited heat transport with a limiter of 0.15, tabulated values of local thermodynamic equilibrium gold opacity, and an approximate model for not in a local thermodynamic equilibrium (NLTE) gold emissivity (DCA_2010). This model has been successful in predicting the radiation drive in vacuu...
Many empirical studies have established that state dependence varies across consumers, brands, and categories. Previous analytic models have assumed that state dependence is a customer characteristic that does not vary across firms. In contrast, we take the view that state dependence varies by firm. That is, a well-known national brand, such as Tide detergent, may be able to attract more repeat...
In this paper, the resonance optical absorption method, is used to measure the Cu atoms number density in different power levels of power supply. Atoms are sputtered from a Cu target during plasma magnetron sputtering deposition. For the light source, a commercial Cu hollow cathode lamp is used. For measurement of gas temperature, a small percentage of N2 is added to the gas mixture and the gas...
Through benchmark studies, we explore the performance of PBE density functional theory, with and without Grimme's dispersion correction (DFT-D3), in predicting spectroscopic properties for molecules interacting with rare gas matrices. Here, a periodic-dispersion corrected model of matrix embedding is used for the first time. We use PBE-D3 to determine the equilibrium structures and harmonic vib...
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