scholarly journals Gas discharge sustained by powerful THz and sub-THz gyrotrons in the mixtures of noble gases with nitrogen

2021 ◽  
Vol 2103 (1) ◽  
pp. 012211
Author(s):  
A V Sidorov ◽  
A P Veselov ◽  
S V Razin ◽  
T V Barmashova ◽  
A V Vodopyanov ◽  
...  
Keyword(s):  
Pressure Range ◽  
Noble Gases ◽  
Focal Spot ◽  
Streak Camera ◽  
Velocity Increase ◽  
Discharge Velocity ◽  
Wide Pressure Range ◽  
Heating Radiation ◽  
Discharge Propagation ◽  
Wide Pressure

Abstract The discharge propagation velocity towards electromagnetic radiation of sub-THz and THz bands was measured in various noble gases (argon, krypton) mixtures with nitrogen in the wide pressure range (0.1 – 2 atm) for various field intensities into the focal spot (from dozen of kW/cm2 to several MW/cm2). In the experimental setups two different gyrotrons were used. In case of 263 GHz it was CW gyrotron with power up 1 kW, in case of 670 GHz – pulsed gyrotron (20 μs) with power up to 40 kW. In both cases the focusing system provided the size of the focal spot of (2–3)·λ, which ensured the investigation of discharge phenomena in a wide pressure range (0.1 – 2 atm). In both cases discharge appeared in the focal spot spread towards heating radiation into the area with the field intensity much less than one in the focal spot. Velocity of the discharge propagation was measured by using photos from speed camera with small exposure (down to 20 ns) and streak camera. It was demonstrated that discharge velocity increase along with pressure decrease and drops with electric field decrease as it moves away from the focal spot.

Study of physisorption isotherm of water on technical nickel surface with a wide pressure range

Vacuum ◽  
2017 ◽  
Vol 145 ◽  
pp. 123-127 ◽  
Author(s):  
Yanwu Li ◽  
Yongjun Cheng ◽  
Wenjun Sun ◽  
Yongjun Wang ◽  
Meng Dong ◽  
...  
Keyword(s):  
Pressure Range ◽  
Nickel Surface ◽  
Wide Pressure Range ◽  
Wide Pressure

Adsorption isotherms and kinetics of carbon dioxide on Chinese dry coal over a wide pressure range

Adsorption ◽  
2015 ◽  
Vol 21 (1-2) ◽  
pp. 53-65 ◽  
Author(s):  
Yongchen Song ◽  
Wanli Xing ◽  
Yi Zhang ◽  
Weiwei Jian ◽  
Zhaoyan Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Isotherms ◽  
Pressure Range ◽  
Adsorption Isotherms And Kinetics ◽  
Wide Pressure Range ◽  
Kinetics Of ◽  
Wide Pressure

Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Chrom, II. Zur Stöchiometrie des Spinells FeCr2O4 / Distribution and Valence of the Cations in Spinel Systems with Iron and Chromium, II. On the Stoichiometry of the Spinel FeCr2O4

1991 ◽  
Vol 46 (5) ◽  
pp. 653-661 ◽  
Author(s):  
Andreas Eggert ◽  
Erwin Riedel
Keyword(s):  
Pressure Range ◽  
Total Iron ◽  
X Ray ◽  
Partial Pressures ◽  
Wide Pressure Range ◽  
Wide Pressure ◽  
Additional Phase

FeCr2O4 has been prepared under CO-CO2-atmosphere with oxygen partial pressures between 10-18 and 10-8 bar. X-Ray and Mößbauer investigations show that under higher pressures FeCr2O4 is not stoichiometric but contains Fe(III), and that corund type Cr2O3 as an additional phase has been formed. In the wide pressure range from 10-17 to 10-14 bar the contents of Fe(III) are lower than 1% of total iron, and the corund phase is negligible.

Transparent Pressure Sensor with High Linearity over a Wide Pressure Range for 3D Touch Screen Applications

2020 ◽  
Vol 12 (14) ◽  
pp. 16691-16699 ◽  
Author(s):  
Han Byul Choi ◽  
Jinwon Oh ◽  
Youngsoo Kim ◽  
Mikhail Pyatykh ◽  
Jun Chang Yang ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Pressure Range ◽  
Touch Screen ◽  
High Linearity ◽  
Wide Pressure Range ◽  
Wide Pressure

scholarly journals Quantitative gas composition analysis method for a wide pressure range up to atmospheric pressure—CO2 plasma case study

2020 ◽  
Vol 91 (11) ◽  
pp. 113501
Author(s):  
Ante Hecimovic ◽  
Federico D’Isa ◽  
Emile Carbone ◽  
Aleksander Drenik ◽  
Ursel Fantz
Keyword(s):  
Atmospheric Pressure ◽  
Pressure Range ◽  
Composition Analysis ◽  
Gas Composition ◽  
Analysis Method ◽  
Wide Pressure Range ◽  
Co2 Plasma ◽  
Wide Pressure

scholarly journals Innenrücktitelbild: High Ammonia Uptake of a Metal–Organic Framework Adsorbent in a Wide Pressure Range (Angew. Chem. 50/2020)

2020 ◽  
Vol 132 (50) ◽  
pp. 22991-22991
Author(s):  
Dae Won Kim ◽  
Dong Won Kang ◽  
Minjung Kang ◽  
Jung‐Hoon Lee ◽  
Jong Hyeak Choe ◽  
...  
Keyword(s):  
Pressure Range ◽  
Metal Organic Framework ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Wide Pressure Range ◽  
Metal Organic ◽  
Wide Pressure ◽  
Organic Framework

Methyl ester synthesis catalyzed by nanoporous gold: from 10−9 Torr to 1 atm

2015 ◽  
Vol 5 (2) ◽  
pp. 1299-1306 ◽  
Author(s):  
Lu-Cun Wang ◽  
Kara J. Stowers ◽  
Branko Zugic ◽  
Monika M. Biener ◽  
Juergen Biener ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Oxidative Coupling ◽  
Pressure Range ◽  
Methyl Esters ◽  
Nanoporous Gold ◽  
Selective Synthesis ◽  
Ester Synthesis ◽  
Mild Conditions ◽  
Wide Pressure Range ◽  
Wide Pressure

Highly selective synthesis of methyl esters can be achieved by oxidative coupling of methanol and aldehydes (acetaldehyde, butyraldehyde) under mild conditions using unsupported nanoporous gold catalysts over a wide pressure range (from 10−9 Torr to 1 atm).

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