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The space charge grid tube was the first type of tetrode to appear. In the course of his research into the action of the audion triode tube invented by Edwin Howard Armstrong and Lee de Forest, Irving Langmuir found that the action of the heated thermionic cathode was to create a space charge, or cloud of electrons, around the cathode. <confused: de Forest invented the triode, Armstrong gave a ...
Isogrid on the interior of the adapter connecting the Orion spacecraft to the Delta IV rocket for Exploration Flight Test 1. Isogrid is a type of partially hollowed-out structure formed usually from a single metal plate with integral triangular stiffening stringers.
[20]: 1–11 [18]: 9 The final wall-temperature, which corresponds to energy of the wall-reradiated X-rays to the secondary's pusher, also drops due to losses from the hohlraum material itself. [15] Note 5 ] Natural uranium nails, lined to the top of their head with copper, attached the radiation case to the ballistic case.
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