Formation of negative cluster ions in collision of sulfur hexafluoride clusters with krypton Rydberg atoms

1986 ◽  
Vol 90 (8) ◽  
pp. 1552-1556 ◽  
Author(s):  
Koichiro Mitsuke ◽  
Tamotsu Kondow ◽  
Kozo Kuchitsu
Keyword(s):  
Sulfur Hexafluoride ◽  
Rydberg Atoms ◽  
Cluster Ions

Formation of negative cluster ions from (CO2)m in collision with high‐Rydberg atoms

1991 ◽  
Vol 94 (1) ◽  
pp. 243-249 ◽  
Author(s):  
Fuminori Misaizu ◽  
Koichiro Mitsuke ◽  
Tamotsu Kondow ◽  
Kozo Kuchitsu
Keyword(s):  
Rydberg Atoms ◽  
Cluster Ions

scholarly journals Determination of the atmospheric lifetime and global warming potential of sulfur hexafluoride using a three-dimensional model

2017 ◽  
Vol 17 (2) ◽  
pp. 883-898 ◽  
Author(s):  
Tamás Kovács ◽  
Wuhu Feng ◽  
Anna Totterdill ◽  
John M. C. Plane ◽  
Sandip Dhomse ◽  
...  
Keyword(s):  
Global Warming ◽  
Electron Density ◽  
Sulfur Hexafluoride ◽  
Climate Model ◽  
Negative Ions ◽  
Cluster Ions ◽  
Ion Chemistry ◽  
Three Dimensional Model ◽  
Atmospheric Lifetime ◽  
Metal Atoms

Abstract. We have used the Whole Atmosphere Community Climate Model (WACCM), with an updated treatment of loss processes, to determine the atmospheric lifetime of sulfur hexafluoride (SF6). The model includes the following SF6 removal processes: photolysis, electron attachment and reaction with mesospheric metal atoms. The Sodankylä Ion Chemistry (SIC) model is incorporated into the standard version of WACCM to produce a new version with a detailed D region ion chemistry with cluster ions and negative ions. This is used to determine a latitude- and altitude-dependent scaling factor for the electron density in the standard WACCM in order to carry out multi-year SF6 simulations. The model gives a mean SF6 lifetime over an 11-year solar cycle (τ) of 1278 years (with a range from 1120 to 1475 years), which is much shorter than the currently widely used value of 3200 years, due to the larger contribution (97.4 %) of the modelled electron density to the total atmospheric loss. The loss of SF6 by reaction with mesospheric metal atoms (Na and K) is far too slow to affect the lifetime. We investigate how this shorter atmospheric lifetime impacts the use of SF6 to derive stratospheric age of air. The age of air derived from this shorter lifetime SF6 tracer is longer by 9 % in polar latitudes at 20 km compared to a passive SF6 tracer. We also present laboratory measurements of the infrared spectrum of SF6 and find good agreement with previous studies. We calculate the resulting radiative forcings and efficiencies to be, on average, very similar to those reported previously. Our values for the 20-, 100- and 500-year global warming potentials are 18 000, 23 800 and 31 300, respectively.

ION DETECTION TECHNIQUES APPLIED TO RYDBERG ATOMS IN EXTERNAL FIELDS

1983 ◽  
Vol 44 (C7) ◽  
pp. C7-193-C7-208 ◽  
Author(s):  
F. Penent ◽  
C. Chardonnet ◽  
D. Delande ◽  
F. Biraben ◽  
J. C. Gay
Keyword(s):  
Rydberg Atoms ◽  
External Fields ◽  
Ion Detection ◽  
Detection Techniques

EQUIPMENT FOR MAINTENANCE OF HIGH-VOLTAGE DEVICES WITH SULFUR HEXAFLUORIDE (SF6) INSULATION

2015 ◽  
pp. 42-45
Author(s):  
V.B. Moskalenko ◽  
◽  
I.G. Chizhov ◽  
O.V. Varakin ◽  
Y.A. Pavlenko ◽  
...  
Keyword(s):  
High Voltage ◽  
Sulfur Hexafluoride
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