Positive‐ion emission from the fracture of fused silica

1989 ◽  
Vol 7 (3) ◽  
pp. 1829-1834 ◽  
Author(s):  
S. C. Langford ◽  
J. T. Dickinson ◽  
L. C. Jensen ◽  
L. R. Pederson
Keyword(s):  
Fused Silica ◽  
Ion Emission ◽  
Positive Ion

Interaction of vacuum ultraviolet excimer laser radiation with fused silica. I. Positive ion emission

2010 ◽  
Vol 107 (3) ◽  
pp. 033107 ◽  
Author(s):  
Sharon R. George ◽  
John A. Leraas ◽  
S. C. Langford ◽  
J. T. Dickinson
Keyword(s):  
Laser Radiation ◽  
Excimer Laser ◽  
Vacuum Ultraviolet ◽  
Fused Silica ◽  
Excimer Laser Radiation ◽  
Ion Emission ◽  
Positive Ion

The role of defects in laser induced positive ion emission from ionic crystals

1996 ◽  
Vol 96-98 ◽  
pp. 316-320 ◽  
Author(s):  
J.T. Dickinson ◽  
J.-J. Shin ◽  
S.C. Langford
Keyword(s):  
Ionic Crystals ◽  
Ion Emission ◽  
Positive Ion

Positive Ion Emission from Nickel

1940 ◽  
Vol 57 (4) ◽  
pp. 335-335 ◽  
Author(s):  
G. A. Jarvis
Keyword(s):  
Ion Emission ◽  
Positive Ion

Ion and Electron Spectroscopy During Pulsed Laser Irradiation of Silicon

1983 ◽  
Vol 13 ◽  
Author(s):  
J.P. Long ◽  
R.T. Williams ◽  
T.R. Royt ◽  
J.C. Rife ◽  
M.N. Kabler
Keyword(s):  
Alkali Metals ◽  
Laser Annealing ◽  
Thermal Evaporation ◽  
Pulsed Laser ◽  
Silicon Surfaces ◽  
Energy Distributions ◽  
Electrons And Ions ◽  
Ion Emission ◽  
Positive Ion ◽  
Pulsed Laser Irradiation

ABSTRACTIon mass spectrometry, charged particle yields, and kinetic energy distributions of electrons and ions are used to characterize silicon wafers and vacuum-cleaved silicon surfaces under conditions related to laser annealing. We find that alkali metals dominate the positive ion emission from chemically-cleaned wafers, a mass-72 peak tentatively identified as Si2O+ comprises the main ion emission from the cleaved surface, and ion and electron temperatures can be derived from the energy distribution curves although the Si2O+ emission implies more than a simple thermal evaporation process.

Influence of surface charge on thermal positive ion emission from potassium bromide

1995 ◽  
Vol 89 (4) ◽  
pp. 323-329 ◽  
Author(s):  
Mikhail F. Butman ◽  
Junji Nakamura ◽  
Susumu Kamidoi ◽  
Hiroyuki Kawano
Keyword(s):  
Surface Charge ◽  
Potassium Bromide ◽  
Ion Emission ◽  
Positive Ion

Helpful effect of residual gases upon the thermal positive ion emission from metal surfaces heated in high vacua

Vacuum ◽  
1995 ◽  
Vol 46 (8-10) ◽  
pp. 1139-1143 ◽  
Author(s):  
H Kawano ◽  
K Ohgami ◽  
K Funato ◽  
J Nakamura
Keyword(s):  
Metal Surfaces ◽  
Ion Emission ◽  
Positive Ion

THE MEAN WORK FUNCTION EFFECTIVE FOR POSITIVE ION EMISSION FROM POLY- AND MONOCRYSTALLINE SURFACES

2005 ◽  
Vol 12 (01) ◽  
pp. 107-113 ◽  
Author(s):  
HIROYUKI KAWANO
Keyword(s):  
Work Function ◽  
Electron Emission ◽  
Heterogeneous Surfaces ◽  
Polycrystalline Metals ◽  
Typical Data ◽  
The Mean ◽  
Ion Emission ◽  
Thermionic Property ◽  
Positive Ion ◽  
Good Agreement

To clarify the thermionic property of solids, the mean work function effective for positive ion from polycrystalline surfaces (ϕ+) is theoretically studied together with that for electron emission (ϕe). The theoretical values of ϕ+ and ϕe thus evaluated typically with W are in good agreement respectively with those experimental ones accepted today. The thermionic contrast (Δϕ* ≡ ϕ+ – ϕe) is determined to be 0.56–0.57eV for W. For other polycrystalline metals (Nb, Mo, Ta, Re, Ir and Pt), it ranges from about 0.4 to 0.8eV in contrast with monocrystalline ones having Δϕ* = 0. Consequently, the fact of Δϕ* > 0 should be taken into consideration with any polycrystalline surface, and ϕ+ should be adopted whenever we try to analyze those data on positive ion emission due to any of the processes such as thermal stimulation and ion bombardment at heterogeneous surfaces. This article concludes that such typical data on thermal- and secondary-positive ion emissions are analyzed reasonably by adoption of ϕ+ instead of ϕe.

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