Atmospheric Pressure Gas Lasers. Mode Locking of High-Pressure CO2 Lasers

1974 ◽  
Author(s):  
Hermann A. Haus
Keyword(s):  
High Pressure ◽  
Atmospheric Pressure ◽  
Mode Locking ◽  
Co2 Lasers ◽  
Gas Lasers ◽  
High Pressure Co2

Discharge and oscillation characteristics of transversely excited high-pressure CO2 lasers

1973 ◽  
Vol 93 (2) ◽  
pp. 130-136
Author(s):  
M. Nakatsuka ◽  
C. Yamabe ◽  
M. Yokoyama ◽  
C. Yamanaka
Keyword(s):  
High Pressure ◽  
Co2 Lasers ◽  
High Pressure Co2 ◽  
Oscillation Characteristics

Strahlschneiden mit flüssigem CO2 als Strahlmedium*/Jet cutting with liquid CO2 as jet medium - Qualifying high pressure CO2 jet cutting and comparison to water jet cutting

2016 ◽  
Vol 106 (10) ◽  
pp. 775-780
Author(s):  
E. Prof. Uhlmann ◽  
P. John ◽  
J. Mankiewicz
Keyword(s):  
High Pressure ◽  
Atmospheric Pressure ◽  
Experimental System ◽  
Water Jet ◽  
Basic Knowledge ◽  
System A ◽  
Water Jet Cutting ◽  
Liquid Co2 ◽  
High Pressure Co2

Hochdruckstrahlschneiden mit flüssigem CO2 bietet die Möglichkeit der trockenen sowie rückstandsfreien Bearbeitung unterschiedlichster Werkstoffe. Mithilfe eines experimentellen Versuchsstands können flüssige CO2-Strahlen mit einem Druck von bis zu 3000 bar erzeugt werden, die nach dem Austritt aus der Düse – trotz Atmosphärenbedingungen und Übergang in die Gasphase – zeitweise für die Bearbeitung von Werkstücken sowie Oberflächen nutzbar sind. Erste Versuche führten zu Grundlagenwissen über Strahlstoßkraft und Kerbgeometrien.   Cutting with a high-pressure CO2 jet has the potential for a dry and residue-free machining of various materials. With an experimental system a high-pressure liquid CO2 jet with up to 3000 bar expands into atmospheric pressure after exiting the nozzle and can be used for the machining of parts and surfaces. Investigations led to basic knowledge about jet force and notch geometries.

Cyclone Bomb hits Southern Brazil in 2020

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Ricardo Gobato ◽  
Alireza Heidari
Keyword(s):  
High Pressure ◽  
Atmospheric Pressure ◽  
High Speed ◽  
Satellite Images ◽  
The State ◽  
Southern Brazil ◽  
Santa Catarina ◽  
High Area ◽  
South Of Brazil ◽  
Rapid Drop

An “explosive extratropical cyclone” is an atmospheric phenomenon that occurs when there is a very rapid drop in central atmospheric pressure. This phenomenon, with its characteristic of rapidly lowering the pressure in its interior, generates very intense winds and for this reason it is called explosive cyclone, bomb cyclone. With gusts recorded of 116 km/h, atmospheric phenomenon – “cyclone bomb” (CB) hit southern Brazil on June 30, the beginning of winter 2020, causing destruction in its influence over. One of the cities most affected was Chapecó, west of the state of Santa Catarina. The satellite images show that the CB generated a low pressure (976 mbar) inside it, generating two atmospheric currents that moved at high speed. In a northwest-southeast direction, Bolivia and Paraguay, crossing the states of Parana and Santa Catarina, and this draft that hit the south of Brazil, which caused the destruction of the affected states.  Another moving to Argentina, southwest-northeast direction, due to high area of high pressure (1022 mbar). Both enhanced the phenomenon.

Green approach for fabrication of bacterial cellulose-chitosan composites in the solutions of carbonic acid under high pressure CO2

2021 ◽  
Vol 258 ◽  
pp. 117614
Author(s):  
Ilya V. Novikov ◽  
Marina A. Pigaleva ◽  
Alexander V. Naumkin ◽  
Gennady A. Badun ◽  
Eduard E. Levin ◽  
...  
Keyword(s):  
High Pressure ◽  
Bacterial Cellulose ◽  
Carbonic Acid ◽  
Green Approach ◽  
High Pressure Co2

An experimental study on the flow characteristics during the leakage of high pressure CO2 pipelines

2019 ◽  
Vol 125 ◽  
pp. 92-101 ◽  
Author(s):  
Shuaiwei Gu ◽  
Yuxing Li ◽  
Lin Teng ◽  
Cailin Wang ◽  
Qihui Hu ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Flow Characteristics ◽  
High Pressure Co2
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