This object is on display in the Boeing Aviation Hangar room at Steven F. Udvar-Hazy Center in Chantilly, VA.
Collection Item Summary:
Bendix M306 Continuous Resistance Strip Electron Multiplier, an ultraviolet detector representative of those used on the OSO-F satellite. Utilizes an open cathode magnetic electron multiplier design that does not need to be enclosed in a glass or other insulating envelope since the vacuum required for its operation is supplied by the lack of atmosphere in Earth orbit. A UV photon striking the surface of the cathode at the entrance grid of the device results in the release of one or more electrons. The first of a series of permanent magnets then directs the emitted electrons onto a strip of specially coated glass. This results in the release of a large number of secondary electrons. Repetition of this process leads to a cascade of charge. The current gain can be as high as 10 million fold. The detector was transferred to NASM by NASA (GSFC) in 1988.
Collection Item Long Description:
National Air and Space Museum
Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum
Transferred from the National Aeronautics and Space Administration
- Block - metal
- Cathode - corrugated gold
- Tubes - metal
- Other: 3/16 in. diameter x 1 in. tall x 1 in. long x 3/4 in. wide (0.5 x 2.5 x 2.5 x 1.9cm)
- Other: 2 1/2 in. diameter (6.4cm)
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Country of Origin
United States of America