Cumulative interaction in the deflection cavities of a high-powermagnicon amplifier

A major factor limiting the output power of a high-power magnicon is RF breakdown in its penultimate cavity. Utilization of the principal of angle summing allows us to achieve cumulative interaction between a beam and RF fields of the magnicon deflection system, and thus to decrease the maximum electric field in the penultimate cavity. In this paper, the problems of implementing a cumulative interaction in a magnicon deflecting system are discussed. A deflecting system with coupled cavities working according to the principal of angle summing, which has been tested with success experimentally, has a limitation caused by instabilities that can limit pulse duration at a power level higher than a few tens of milliwatts. The method described employs a set of uncoupled penultimate cavities to obtain cumulative interaction at high power without sacrifice of pulsewidth     

Study of Active Microwave Compressors Excited by Magnicon Radiation at a Frequency of 11.4 GHz

We present the results of a study of single-channel and two-channel compressors of microwave pulses, operated at a frequency of 11.4 GHz, in which a high-Q factor storing resonator and a novel plasma switch are used. In the single-channel compressor excited by magnicon radiation at a frequency of 11.4 GHz, 24-MW pulses have been obtained for a compression ratio equal to 8. In the two-channel compressor, coherent composition of pulses with the use of a 3-dB directional coupler has been demonstrated. Compressed pulses with powers of 9 to 11 MW and durations of 50 to 60 ns have been obtained at the incident-power level 1–1.5 MW, which corresponded to the compression ratio k = 8–9.3.     

Alkaloids of Aconitum monticola structure of acomonine

Summary The roots ofAconitum monticola have yielded songorine, songaramine, norsongorine, an amorphous base with the composition C₂₂H₃₅NO₆, a base C₂₂H₃₃NO₆ with mp 166–167°C, a base C₂₂H₃₃NO₅ with mp 161–164°C, and the new alkaloid acomonine. The structure of acomonine has been established on the basis of chemical transformations and spectral properties: It consists of a lycoctonine nucleus with an -hydroxy group at C₃, an -methoxy group at C₁₀,-methoxy groups at C₆ and C₁₅, an -glycol system at C₇ and C₈, and a methoxy group at C₁₉.Institute of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 389–395, May–June, 1975.     

Structure of iliensine

Summary On the basis of chemical reactions and spectroscopy, it has been shown that the new alkaloid iliensine has the lycoctonine skeleton with -hydroxy groups at C₃ and C₁₀, an -glycol system at C_7–8, -methoxy group at C₆ and C₁₅, a methoxymethyl group at C₄, and an iminoethyl group. A correlation has been made of iliensine with acomonine.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 770–775, November–December, 1975.