scholarly journals Effects of electrical charging on the mechanical Q of a fused silica disk

2003 ◽  
Vol 74 (11) ◽  
pp. 4840-4845 ◽  
Author(s):  
Michael J. Mortonson ◽  
Christophoros C. Vassiliou ◽  
David J. Ottaway ◽  
David H. Shoemaker ◽  
Gregory M. Harry
Keyword(s):  
Fused Silica ◽  
Electrical Charging

SEM analysis of DC magnetron sputtered beryllium films

1988 ◽  
Vol 46 ◽  
pp. 960-961
Author(s):  
E. F. Lindsey ◽  
C. W. Price ◽  
E. L. Pierce ◽  
E. J. Hsieh
Keyword(s):  
Fine Structure ◽  
Electron Emission ◽  
Secondary Electron ◽  
Low Voltage ◽  
Ion Beam ◽  
Secondary Electron Emission ◽  
Sem Analysis ◽  
Fused Silica ◽  
Grain Structure ◽  
Silica Substrate

Columnar structures produced by DC magnetron sputtering can be altered by using RF biased sputtering or by exposing the film to nitrogen pulses during sputtering, and these techniques are being evaluated to refine the grain structure in sputtered beryllium films deposited on fused silica substrates. Beryllium is brittle, and fractures in sputtered beryllium films tend to be intergranular; therefore, a convenient technique to analyze grain structure in these films is to fracture the coated specimens and examine them in an SEM. However, fine structure in sputtered deposits is difficult to image in an SEM, and both the low density and the low secondary electron emission coefficient of beryllium seriously compound this problem. Secondary electron emission can be improved by coating beryllium with Au or Au-Pd, and coating also was required to overcome severe charging of the fused silica substrate even at low voltage. The coating structure can obliterate much of the fine structure in beryllium films, but reasonable results were obtained by using the high-resolution capability of an Hitachi S-800 SEM and either ion-beam coating with Au-Pd or carbon coating by thermal evaporation.

Investigation of fused silica dynamic behaviour

2006 ◽  
Vol 134 ◽  
pp. 929-934 ◽  
Author(s):  
F. Malaise ◽  
J.-M. Chevalier ◽  
I. Bertron ◽  
F. Malka
Keyword(s):  
Dynamic Behaviour ◽  
Fused Silica

Minimizing residual spectral drift in laser diode bars using femtosecond-written volume Bragg gratings in fused silica

2017 ◽  
Vol 42 (3) ◽  
pp. 623 ◽  
Author(s):  
Daniel Richter ◽  
Malte P. Siems ◽  
Wilko J. Middents ◽  
Maximilian Heck ◽  
Thorsten A. Goebel ◽  
...  
Keyword(s):  
Laser Diode ◽  
Bragg Gratings ◽  
Fused Silica ◽  
Volume Bragg Gratings

Numerical Modeling and Experimental Study of Laser Assisted Machining of Fused Silica

Silicon ◽  
2021 ◽  
Author(s):  
Huawei Song ◽  
Pengfei Pan ◽  
Kaihua Xu ◽  
Yuping Zhang ◽  
Zhengxin Yang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Numerical Modeling ◽  
Fused Silica ◽  
Laser Assisted Machining
Sign in / Sign up

Export Citation Format

Share Document