| Autor: |
Golden, J., Kapetanakos, C.A., Lee, Roswell, Goldsteint, Shyke A. |
| Zdroj: |
1975 International Topical Conference on Electron Beam Research & Technology; 1/ 1/1975, p635-656, 22p |
| Abstrakt: |
The ion current of a reflex-triode has been studied as a function of the anode thickness, when a 400 kV positive pulse is applied to such an anode. The 11.4-cm-OD anode consists of solid polyethylene (or polycarbonate) film of thickness, 8, between 2 and 150 µm interwoven between 0.7 mm diameter meter wires spaced 0.7 cm apart. It is observed that the ion current increases with decreasing thickness for 12 < 0 < 120 µm and remains practically constant for thinner films. Contrary to the predictions of a recent theoretical model, the ion current does not exhibit resonance-like behavior. For 8 ≤ 25 µm, the results are in agreement with a macroscopic model, which predicts that the ratio of the ion current to the cathode current is given by 0.5 [1 + (2η + 1)−1 (mi/me)1/2]−1 where η is the average number of passes of a typical electron through the anode. The above theoretical estimates are based on time averages of space charge limited flows. Refinements of the theory are included in a new, one-dimensiona1, multi-species, particle simulation code. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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