Christopher Freeburg, Black Aesthetics and the Interior Life. Charlottesville: University of Virginia Press, 2017. Pp. 172. $24.50 (paper).

2020 ◽  
Vol 105 (3) ◽  
pp. 532-534
Author(s):  
Joanna Dee Das
Keyword(s):  
University Of Virginia ◽  
Black Aesthetics ◽  
Interior Life

Injector for a 100-500 kV Linac Electron Microscopy Source

1967 ◽  
Vol 25 ◽  
pp. 274-275
Author(s):  
John W. Coleman
Keyword(s):  
Electron Microscopy ◽  
Linear Accelerator ◽  
Beam Current ◽  
Ion Trapping ◽  
University Of Virginia ◽  
Electron Injector ◽  
Illumination System ◽  
Radio Corporation Of America ◽  
The University ◽  
Optical Integration

The injector to be described is a component in the Electron Injector-Linear Accelerator—Condenser Module for illumination used on the variable 100-500kV electron microscope being built at the Radio Corporation of America for the University of Virginia.The injector is an independently powered, autonomous unit, operating at a constant 6kV positive with respect to accelerator potential, thereby making beam current independent of accelerator potential. The injector provides for on-axis ion trapping to prolong filament lifetime, and incorporates a derived Einzel lens for optical integration into the overall illumination system for microscopy. Electrostatic beam deflectors for alignment are an integral part of the apparatus. The entire injector unit is cantilevered off a door for side loading, and is topped with a 4-filament turret released electrically but driven by a self-contained Negator spring motor.

August Wilson and Black Aesthetics

2004 ◽  
Author(s):  
Sandra Shannon ◽  
Dana Williams
Keyword(s):  
August Wilson ◽  
Black Aesthetics
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