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Retrosirnulation of a space traveling-wave tube 250 W, Ka-band, 4-stages collector

Bugnot, Dorian (2015) EITM01 20141
Department of Electrical and Information Technology
Abstract
The internship is dedicated to the modeling of RF and electrical performances of a 250 W Ka traveling- wave tube, using computation codes developed internally. The objective was to compare simulations and measurements in order to design a 5-stages collector.
The modeling of the interaction wave -beam (RF model) is discussed in the first part. Simulations are done with the internal code MVTRAD. In particular, the gain (at saturation and small signal), the output power and the phase shift are simulated and compared to measurements. Then, we model the collector with the internal code COLLECTD. We look at the electron trajectories and velocities
in the collector and we compare the current collected on each electrode to the measurement.
... (More)
The internship is dedicated to the modeling of RF and electrical performances of a 250 W Ka traveling- wave tube, using computation codes developed internally. The objective was to compare simulations and measurements in order to design a 5-stages collector.
The modeling of the interaction wave -beam (RF model) is discussed in the first part. Simulations are done with the internal code MVTRAD. In particular, the gain (at saturation and small signal), the output power and the phase shift are simulated and compared to measurements. Then, we model the collector with the internal code COLLECTD. We look at the electron trajectories and velocities
in the collector and we compare the current collected on each electrode to the measurement.
Discrepancies have been found between simulations and measurements so that the codes have not been found reliable enough for creating a new design. The objective of the internship changed and we focused on understanding the collector simulation discrepancies. (Less)
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author
Bugnot, Dorian
supervisor
organization
course
EITM01 20141
year
type
H1 - Master's Degree (One Year)
subject
report number
LU/LTH-EIT 2015-469
language
English
id
8772448
date added to LUP
2016-02-25 13:16:20
date last changed
2016-02-25 13:16:20
@misc{8772448,
  abstract     = {The internship is dedicated to the modeling of RF and electrical performances of a 250 W Ka traveling- wave tube, using computation codes developed internally. The objective was to compare simulations and measurements in order to design a 5-stages collector.
The modeling of the interaction wave -beam (RF model) is discussed in the first part. Simulations are done with the internal code MVTRAD. In particular, the gain (at saturation and small signal), the output power and the phase shift are simulated and compared to measurements. Then, we model the collector with the internal code COLLECTD. We look at the electron trajectories and velocities
in the collector and we compare the current collected on each electrode to the measurement. 
Discrepancies have been found between simulations and measurements so that the codes have not been found reliable enough for creating a new design. The objective of the internship changed and we focused on understanding the collector simulation discrepancies.},
  author       = {Bugnot, Dorian},
  language     = {eng},
  note         = {Student Paper},
  title        = {Retrosirnulation of a space traveling-wave tube 250 W, Ka-band, 4-stages collector},
  year         = {2015},
}