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Measurement of back-bombardment temperature rise in microwave thermionic electron guns
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10.1063/1.4817539
/content/aip/journal/rsi/84/8/10.1063/1.4817539
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/8/10.1063/1.4817539
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Image of the electron gun: (A) cathode assembly and cathode heater, (B) gun accelerating cavity (copper block to the left of (B)), (C) waveguide feeding RF to gun cavity, and (D) detector, focusing lens (below), and view port (below lens) used for the measurements described here.

Image of FIG. 2.
FIG. 2.

Fit of measured temperature and voltage pairs to the theoretical T(V) polynomial via the current scaling parameter C described in Sec. II B . Error bars for temperature and voltage represent the standard deviation of 5 measurements taken with the optical pyrometer and the oscilloscope readout resolution, respectively.

Image of FIG. 3.
FIG. 3.

Cathode temperature as a function of time during the RF macropulse (red solid) and a linear fit of the slope of 10.8 K/μs (blue dots) with the deflection magnet active. This represents an average of 10 measurements with background noise (due to nearby high voltage electronics) subtracted.

Image of FIG. 4.
FIG. 4.

Cathode temperature as a function of time during the RF macropulse (red solid) and a linear fit of the slope of 13.8 K/μs (blue dots) without the deflection magnet active. The heating slope is substantially increased without the deflection magnet. This represents an average of 10 measurements with background noise (due to nearby high voltage electronics) subtracted.

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/content/aip/journal/rsi/84/8/10.1063/1.4817539
2013-08-13
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Measurement of back-bombardment temperature rise in microwave thermionic electron guns
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/8/10.1063/1.4817539
10.1063/1.4817539
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