A. Perrenoud
École Normale Supérieure
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IEEE Transactions on Microwave Theory and Techniques | 1990
P. Muggli; M.Q. Tran; T. M. Tran; H.-G. Mathews; G. Agosti; S. Alberti; A. Perrenoud
The operating characteristics of a low-Q (Q/sub cav/=225), 8-GHz gyrotron oscillator operating in the TE/sub 011//sup O/ mode and submitted to various mismatched loads are reported. Under matched conditions, output power up to 310 kW ( eta =35%) and maximum efficiency up to 43% were measured. In general, power reflection from loads with different phases and amplitudes leads to an output power decrease. Excessive reflections cause mode switching (TE/sub 011//sup O/ to TE/sub 012//sup O/) or even arcing inside the tube. The effect of power reflection is seen to increase rapidly with current and output power. Nevertheless, as predicted by calculations, the maximum output power is not reached under matched conditions but with a specific nonzero value of the complex reflection coefficient. >
IEEE Transactions on Electron Devices | 1989
T. M. Tran; M.Q. Tran; S. Alberti; J.P. Hogge; B. Isaak; P. Muggli; A. Perrenoud
The prospects for high-power (several megawatts) quasi-optical gyrotrons operating in the high-frequency region (>or=150 GHz) are considered. The analysis is mainly concerned with the physics of interaction between the annular electron beam and the electromagnetic field within the quasi-optical resonator, together with the constraints required by long-pulse or CW operations. It is shown that powers of several megawatts at frequencies exceeding 150 GHz are possible if one can maintain single-mode operation in the overmoded quasi-optical resonators. A thorough performance study of the magnetron injection gun for such high-power gyrotrons is carried out using the adiabatic theory as well as numerical simulations. >
Proc. ITG-Fachtagung | 1989
B. Jödicke; H.-G. Mathews; G. Agosti; S. Alberti; A. Bondeson; Hogge J.-P.; B. Isaak; P. Muggli; A. Perrenoud; Tran T.M.; Tran M.Q.
Proc. 14th Int. Conference on Infrared and Millimeter Waves | 1989
Hogge J.-P.; S. Alberti; Tran M.Q.; A. Perrenoud; Tran T.M.; B. Isaak; A. Bondeson; B. Jödicke; H.-G. Mathews
Archive | 1991
A. Pochelon; T.P. Goodman; D.R. Whaley; Tran M.Q.; A. Perrenoud; D. Reinhard; B. Jödicke; H.-G. Mathews; W. Kasparek; M. Thumm
Société Suisse de Physique | 1989
S. Alberti; J.P. Hogge; P. Muggli; Tran M.Q.; Tran T.M.; A. Perrenoud; H.-G. Mathews; G. Agosti
Société Suisse de Physique | 1989
P. Muggli; Tran M.Q.; Tran T.M.; H.-G. Mathews; G. Agosti; S. Alberti; A. Perrenoud
Archive | 1989
Hogge J.-P.; A. Perrenoud; Tran M.Q.; S. A.berti; B. Isaak; P. Muggli; Tran T.M.
Conference Digest 12th Int. Conference on Infrared and Millimeter Waves | 1987
H.-G. Mathews; G. Agosti; K. Holm; D. Kuse; P. Muggli; Tran M.Q.; S. Alberti; A. Perrenoud; Tran T.M.
Proc. 11th Int. Conference on Infrared and Millimeter Waves | 1986
A. Bondeson; B. Isaak; A. Perrenoud; Tran M.Q.; S. Alberti; P. Muggli
