  X-ray window sheet.
X-rays are generated by accelerating electrons in a vacuum tube: When they strike a target at the positive side of the tube, x-rays are emitted. The problem then is how to let the x-rays out of the tube without letting air in. The answer is a beryllium window. Beryllium is virtually transparent to x-rays, but impervious to air. This is a sheet of beryllium from which several round pieces have been punched to make x-ray windows.
Source: Juan Jimenez
Contributor: Juan Jimenez
Acquired: 6 April, 2007
Text Updated: 6 April, 2007
Price: Donated
Size: 3"
Purity: >99%
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