[en] The description and test results of a cm-wave range power pulse microwave source-magnicon-frequency doubler designed for an electron gun of a linear collider are presented. In the given scheme of the magnicon the gap which is free from guiding magnetic field between the output resonator and the scanner is absent. Magnetic system is an armour solenoid comprising eight similar water-cooled coils. 3 refs., 2 tabs., 2 figs

No abstract available

[en] The particularities of the magnicon, of a 7GHz pulse microwave source-magnicon-frequency doubler designed for a linear collider as an alternative of microwave energy source for linear colliders are considered. It a beams modulation method: beam circular scanning of relativistic electrons is used. The new experimental results are presented

[en] This paper presents a progress in the program of developing and researching of the high power pulsed 7 GHz magnicon - an amplifier operating in frequency-doubled mode. The tube design chosen by the numerical simulation and previous device versions investigations, the problems faced and overcome during testing as well as the latest experimental results in which a power of 30 MW, efficiency of 35 % and pulse width of 0.7 μs have been obtained at operating frequency of 7 GHz are described in the paper. (author)

[en] The 100 MeV linear accelerator operating in stored energy mode is described. It is designed to inject the electron beam (with 15 ns pulse duration and 200 mA current within 1% energy spread) into the booster ring. The linac design is based on the 2.8 GHz DAW structure with three radial stems. The developed construction is easy for fabrication and tuning and provides a good shunt impedance of 92 MOhm/m and the working frequency domain being free of high order modes. The structure consists of a single 6 m long section. The accelerator has a simple injection system without a special buncher. The nonbunched 40 keV beam formed by a diode gun is injected directly into the first DAW cavity. The focusing system is simple too. It is provided both by the matching lens in front of the structure and by an RF field and has no focusing elements in the acceleration channel. The first results of the accelerator performance are presented

[en] The aim of the paper is to describe the status and prospects of magnicons - devices with electron beam modulation by circular scanning. The parameters of developed magnicons are not worse than parameters of the best modern devices (gyro-klystrons). The magnicon ability to operate with varying loads without circulator using ensures effective application of magnicons in large accelerating complexes

[en] The magnicon is a microwave amplifier in which the beam is modulated by means of its circular deflection. Presented in this reports is a frequency doubling amplifier developed as a prototype of the microwave energy source for linear colliders. The magnicon is driven by a beam with a power of up to 100 MW and a microperveance of 0.83, the source of which is a thermionic electron gun with a very high convergence (up to 2000:1 in area). During the investigation the following results were obtained: a power of 30 MW, an efficiency of 35%, and a gain of 55 dB. This paper presents the tube design, problems faced and overcome during the investigation, and possible methods of further improving the device

[en] The project of the HF alternative source for the VEPP-5 complex electron-positron injector is considered. The magnicon consists of a diode electron gun, solenoid, high-frequency system and collector. The electron beam, formed by the electron gun, is injected into the high-frequency system. The magnicon, operating on the input frequency second harmonics, should provide for: up to 80 MW output capacity in the pulse of 5 μs by the electron efficiency above 50% and amplification factor ∼ 50 dB. The developed magnicon is not inferior to the best as the alternative high-frequency power source for modern linear accelerators

No abstract available

[en] The development at INP electron optical system for a 7 GHz magnicon incorporating the high voltage diode gun based on a 120 mm oxide cathode with microperveance of 0.83 and high electrostatic compression of a beam as well as the guiding magnetic system are described here. The main problems and the concepts used for the formation of the super dense relativistic beam in the diode gun and its matching with magnetic system are described in detail. The geometry of the whole electron optical system is given and the results of numerical calculations for the beam dynamics are described. The experimental results of the formation of electron beam and its transportation through the guiding magnetic system are described. As a result of these experiments a beam of 100 MW (U = 436 kV, I = 236 A) in a pulse of 2 μs is obtained. The measured diameter of a beam in magnetic system is about 2.5 mm and it is close to that of the Brillouin's. Thus, the total measured compression of a beam over area exceeds 2000, power density in a beam achieves 2000 MW/cm² and an energy density in a beam exceeds 4 kJ/cm². (orig.)