Experimental observation of diffusive-thermal oscillations of burner stabilized methane-air flames

2020 ◽  
Vol 213 ◽  
pp. 202-210
Author(s):  
S. Nechipurenko ◽  
T. Miroshnichenko ◽  
N. Pestovskii ◽  
S. Tskhai ◽  
B. Kichatov ◽  
...  
Author(s):  
R. E. Worsham ◽  
J. E. Mann ◽  
E. G. Richardson

This superconducting microscope, Figure 1, was first operated in May, 1970. The column, which started life as a Siemens Elmiskop I, was modified by removing the objective and intermediate lenses, the specimen chamber, and the complete vacuum system. The large cryostat contains the objective lens and stage. They are attached to the bottom of the 7-liter helium vessel and are surrounded by two vapor-cooled radiation shields.In the initial operational period 5-mm and 2-mm focal length objective lens pole pieces were used giving magnification up to 45000X. Without a stigmator and precision ground pole pieces, a resolution of about 50-100Å was achieved. The boil-off rate of the liquid helium was reduced to 0.2-0.3ℓ/hour after elimination of thermal oscillations in the cryostat. The calculated boil-off was 0.2ℓ/hour. No effect caused by mechanical or electrical instability was found. Both 4.2°K and 1.7-1.9°K operation were routine. Flux pump excitation and control of the lens were quite smooth, simple, and, apparently highly stable. Alignment of the objective lens proved quite awkward, however, with the long-thin epoxy glass posts used for supporting the lens.


1992 ◽  
Vol 2 (4) ◽  
pp. 365-369 ◽  
Author(s):  
Pablo Jensen ◽  
Patrice Melinon ◽  
Alain Hoareau ◽  
Jian Xiong Hu ◽  
Michel Treilleux ◽  
...  

2015 ◽  
Vol 84 (1) ◽  
pp. 5-18
Author(s):  
Kazuhiro ITO ◽  
Hiroto YAMAOKA ◽  
Manabu TANAKA ◽  
Kazuhiro OGAWA ◽  
Kazuyoshi SAIDA ◽  
...  

2021 ◽  
Vol 1 (1) ◽  
pp. 22-26
Author(s):  
Chao Zhang ◽  
Huan Cao ◽  
Yun-Feng Huang ◽  
Bi-Heng Liu ◽  
Chuan-Feng Li ◽  
...  

2021 ◽  
Vol 127 (6) ◽  
Author(s):  
Diego Guzmán-Silva ◽  
Gabriel Cáceres-Aravena ◽  
Rodrigo A. Vicencio

2007 ◽  
Vol 98 (6) ◽  
Author(s):  
N. Kiesel ◽  
C. Schmid ◽  
G. Tóth ◽  
E. Solano ◽  
H. Weinfurter

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