Generation of continuous-wave coherent radiation tunable down to 190.8nm in ?-BaB2O4

1991 ◽  
Vol 53 (1) ◽  
pp. 11-13 ◽  
Author(s):  
M. Watanabe ◽  
K. Hayasaka ◽  
H. Imajo ◽  
J. Umezu ◽  
S. Urabe
1999 ◽  
Vol 16 (10) ◽  
pp. 1668 ◽  
Author(s):  
Kensuke Matsubara ◽  
Utako Tanaka ◽  
Hidetsuka Imajo ◽  
Masayoshi Watanabe ◽  
Shinji Urabe

Author(s):  
A. Aadhi ◽  
Apurv ChaitanyaN. ◽  
M. V. Jabir ◽  
Pravin Vaity ◽  
R. P. Singh ◽  
...  

Author(s):  
T. A. Welton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.


Author(s):  
P. A. Molian ◽  
K. H. Khan ◽  
W. E. Wood

In recent years, the effects of chromium on the transformation characteristics of pure iron and the structures produced thereby have been extensively studied as a function of cooling rate. In this paper, we present TEM observations made on specimens of Fe-10% Cr and Fe-20% Cr alloys produced through laser surface alloying process with an estimated cooling rate of 8.8 x 104°C/sec. These two chromium levels were selected in order to study their phase transformation characteristics which are dissimilar in the two cases as predicted by the constitution diagram. Pure iron (C<0.01%, Si<0.01%, Mn<0.01%, S=0.003%, P=0.008%) was electrodeposited with chromium to the thicknesses of 40 and 70μm and then vacuum degassed at 400°F to remove the hydrogen formed during electroplating. Laser surface alloying of chromium into the iron substrate was then performed employing a continuous wave CO2 laser operated at an incident power of 1200 watts. The laser beam, defocussed to a spot diameter of 0.25mm, scanned the material surface at a rate of 30mm/sec, (70 ipm).


2007 ◽  
Vol 177 (4S) ◽  
pp. 614-614
Author(s):  
Thorsten Bach ◽  
Thomas R.W. Herrmann ◽  
Roman Ganzer ◽  
Andreas J. Gross

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