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| Titel: |
Optimization of R.F. Voltage Amplitudes and Gap Spacing of Generalized Floating Drift-tube Oscillators† |
| Auteur: |
Tekjzer, Kjell Blø |
| Verschenen in: |
International journal of electronics |
| Paginering: | Jaargang 12 (1962) nr. 6 pagina's 461-499 |
| Jaar: |
1962-06-01 |
| Inhoud: |
The generalized floating drift-tube oscillator is a monotron oscillator with an interaction region characterized by a number of narrow gaps separated by drift tubes. The main purpose of the paper is to determine the configurations of gap voltages and drift lengths yielding maximum conversion efficiency The analysis, which is carried out under the assumption of a one-dimensional beam with negligible space charge, is concerned only with the electronic behaviour, and no attention is paid to the circuit properties of the resonant. structure forming the oscillator circuit As a starting point for the numerical large-signal optimization procedure an extensive discussion of the small-signal electronic conductance is given, and the gap configurations maximizing this quantity are determined. The optimum configurations at large signals differ appreciably from those at small signal level For the optimum large-signal configurations some electrons are slowed down to zero velocity in the last gap, but no electrons arc reflected in this or any preceding gap The maximum efficiency increases with the length of the interaction region, but depends very little on the number of drift tubes. Many different configurations yield efficiencies close to the maximum. The highest calculated efficiency is 69·3% for a six-gap oscillator having a total drift angle of 12 cycles. For very long interaction regions the numerical method failed For the sake of comparison configurations with equal gap voltages and equal drift lengths are considered, and shown to yield small-signal electronic conductances close to the maxima, whereas the efficiencies arc considerably lower than those associated with the optimum configurations For a special case (6 gaps)an equivalent continuous r.f. field distribution was investigated. The efficiency is only slightly different. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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