scholarly journals Collisional Heating of Interstellar Helium Flux at 1 AU

2018 ◽  
Vol 123 (5) ◽  
pp. 3291-3298 ◽  
Author(s):  
Mike Gruntman
Keyword(s):  
Collisional Heating

Collisional heating in ionic argon clusters The Ar+Ar2+ case

1997 ◽  
Vol 93 (5) ◽  
pp. 901-907 ◽  
Author(s):  
E. Buonomo ◽  
F. A. Gianturco ◽  
M. Pilar de Lara ◽  
G. Delgado-Barrio ◽  
S. Miret-Arte´s ◽  
...  
Keyword(s):  
Argon Clusters ◽  
Collisional Heating

Collisional heating by nonthermal electrons in a tapered magnetic loop

Solar Physics ◽  
1986 ◽  
Vol 107 (1) ◽  
pp. 83-94 ◽  
Author(s):  
S. Chandrashekar ◽  
A. Gordon Emslie
Keyword(s):  
Magnetic Loop ◽  
Nonthermal Electrons ◽  
Collisional Heating

scholarly journals Investigation of soft X-ray emission from Ar clusters heated by ultrashort laser pulses

2002 ◽  
Vol 20 (1) ◽  
pp. 51-57 ◽  
Author(s):  
T. MOCEK ◽  
C.M. KIM ◽  
H.J. SHIN ◽  
D.G. LEE ◽  
Y.H. CHA ◽  
...  
Keyword(s):  
Line Emission ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Spectral Lines ◽  
Gas Temperature ◽  
X Ray ◽  
Charge States ◽  
Ar Gas ◽  
Collisional Ionization ◽  
Collisional Heating

We report soft X-ray spectra (4–18 nm) produced by the interaction of 25–100-fs laser pulses at an intensity of up to 7 × 1016 W/cm2 with a cryogenically cooled Ar gas jet. New spectral lines from Ar8+, Ar9+, and Ar10+ charge states appeared with decreasing preexpansion gas temperature. A nonlinear increase of X-ray line emission from Ar7+, Ar8+, and Ar9+ was observed with cooling, which saturated below a certain temperature. The drastic change in the spectrum is attributed to efficient collisional heating and collisional ionization of growing, small- to medium-sized (102–103 atoms) Ar clusters from the cooled jet. When the laser pulse was extended from 25 to 100 fs we observed considerably stronger emission on lines from high charge states, such as Ar8+, Ar9+, and Ar10+, which suggests that the resonance absorption condition could be reached for the 100-fs pulse.

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