Abstract
IN the Spectracon1 electronographic image tube, in the form now used for spectrographic recording, the image area is restricted to a rectangle 30 mm × 5 mm to enable a very thin (4 µm) mica Lenard window to be used which will support not only atmospheric pressure but also the pressure required to keep the electron-sensitive emulsion in intimate contact with the external mica surface when recording the image electrons.
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References
McGee, J. D., McMullan, D., Bacik, H., and Oliver, M., Adv. Electronics Electron Phys., 28 A, 61 (1969).
Walker, M. F., Sky and Telescope, 40, 132 (1970).
McGee, J. D., Bacik, H., Coleman, C. I., and Morgan, B. L., Adv. Electronics Electron Phys., 33 A, 13 (1972).
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MCGEE, J., COLEMAN, C. & PHILLIPS, E. Large Window Spectracon. Nature 241, 264 (1973). https://doi.org/10.1038/241264a0
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DOI: https://doi.org/10.1038/241264a0
