Use of unstable resonators in achieving the diffraction divergence of the radiation emitted from high-gain pulsed gas lasers

1974 ◽  
Vol 4 (4) ◽  
pp. 474-477 ◽  
Author(s):  
K I Zemskov ◽  
A A Isaev ◽  
M A Kazaryan ◽  
G G Petrash ◽  
Sergei G Rautian
Keyword(s):  
High Gain ◽  
Gas Lasers ◽  
Diffraction Divergence ◽  
Unstable Resonators

Methods for Measuring Several Parameters of CW and Pulsed High-Gain Gas Lasers

1975 ◽  
Vol 14 (S1) ◽  
pp. 105
Author(s):  
Hideya Gamo ◽  
John Speight Ostrem ◽  
Heihachi Sato
Keyword(s):  
High Gain ◽  
Gas Lasers

On the super-Gaussian unstable resonators for high-gain short-pulse laser media

1993 ◽  
Vol 29 (5) ◽  
pp. 1423-1487 ◽  
Author(s):  
M.R. Perrone ◽  
A. Piegari ◽  
S. Scaglione
Keyword(s):  
Pulse Laser ◽  
Short Pulse ◽  
High Gain ◽  
Short Pulse Laser ◽  
Laser Media ◽  
Unstable Resonators

Effect of energy filtering on micro-diffraction in the SEM

1994 ◽  
Vol 52 ◽  
pp. 604-605
Author(s):  
James F. Mancuso ◽  
Leo A. Fama ◽  
William B. Maxwell ◽  
Jerry L. Lehman ◽  
Hasso Weiland ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Ccd Camera ◽  
High Gain ◽  
Microchannel Plate ◽  
Electrostatic Energy ◽  
Energy Filtering ◽  
Electron Channelling ◽  
Low Energy Electrons ◽  
Low Sensitivity ◽  
Angular Field Of View

Micro-diffraction based crystallography is essential to the design and development of many classes of ‘crafted materials’. Although the scanning electron microscope can provide crystallographic information with high spatial resolution, its current utility is severely limited by the low sensitivity of existing diffraction techniques (ref: Dingley). Previously, Joy showed that energy filtering increased contrast and pattern visibility in electron channelling. This present paper discribes the effect of energy filtering on EBSP sensitivity and backscattered SEM imaging.The EBSP detector consisted of an electron energy filter, a microchannel plate detector, a phosphor screen, optical coupler, and a slow scan CCD camera. The electrostatic energy filter used in this experiment was constructed as a cone with 5 coaxial electrodes. The angular field-of-view of the filter was approximately 38°. The microchannel plate, which was the initial sensing component, had high gain and had 50% to 80% detection efficiency for the low energy electrons that passed through the retarding field filter.

Equivalent Noise Dose Obtained Through Hearing Aids in the Classrooms of Hearing-Impaired Children

1990 ◽  
Vol 21 (3) ◽  
pp. 147-150
Author(s):  
Ronald A. Wilde
Keyword(s):  
Hearing Aids ◽  
High Gain ◽  
Hearing Impaired ◽  
Deaf Children ◽  
Impaired Children ◽  
Very High ◽  
Hearing Impaired Children

A commercial noise dose meter was used to estimate the equivalent noise dose received through high-gain hearing aids worn in a school for deaf children. There were no significant differences among nominal SSPL settings and all SSPL settings produced very high equivalent noise doses, although these are within the parameters of previous projections.

An efficient and simple spark-gap design for gas lasers

1994 ◽  
Vol 4 (12) ◽  
pp. 2609-2616 ◽  
Author(s):  
M. Diniz Santa Marinha ◽  
L. Marinho Soares ◽  
A. Dias Tavares ◽  
C. E. Fellows ◽  
C. A. Massone
Keyword(s):  
Gas Lasers ◽  
Spark Gap

Condensed- and compressed-gas lasers

1986 ◽  
Vol 148 (1) ◽  
pp. 55 ◽  
Author(s):  
N.G. Basov ◽  
V.A. Danilychev
Keyword(s):  
Gas Lasers ◽  
Compressed Gas
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