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Role of a biased electrode in the production of highly charged ions using the DECRIS 14-3 ion source

Leporis M., Bogomolov S., Efremov A., Loginov V., Mironov V.

Nukleonika

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2003

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Vol. 48,suppl.2

89-92

EN

ECR ion sources are used for the production of highly charged ions in various accelerator facilities. In most of them biased electrodes are normally used to increase the ion yield. Physical processes in the plasma of an ion source are quite complicated and the role of a biased electrode is not clear. To investigate the effect of a biased electrode on the intensity of extracted highly charged ions, an axially movable electrode was placed into the plasma chamber of the DECRIS 14-3 ion source. It was found that the intensity of Ar ions depends on the position of the biased electrode and negative bias voltage. The optimal position of the biased electrode was found near the maximum of the magnetic field. Experiments with a pulsed biased electrode were also carried out. The influence of the negative pulse on the ion yield depends on the ion charge state.

2

First beam from the DECRIS 14-2m ion source for Slovak Republic

Loginov V., Bekhterev V., Bogomolov S., Efremov A., Lebedev A., Leporis M., Yazvitsky N., Zelenak A.

Nukleonika

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2003

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Vol. 48,suppl.2

85-88

EN

The ECR laboratory of the Cyclotron Centrum of Slovak Republic (CC SR) in Bratislava, Slovakia, consists of the DECRIS 14-2m ion source and two low energy channels. It is a complete injector, consisting of an ECR ion source, focusing and steering elements, an analyzing magnet, a vacuum system, and an ion beam diagnostic system. The DECRIS 14-2m ion source is a multiply charged heavy ion source based on the electron cyclotron resonance principle. The ECR ion source DECRIS 14-2m and other system have been designed and manufactured at the FLNR JINR. The preliminary testing (magnetic field measurements, vacuum testing and testing of ECR ion source) has been performed at FLNR JINR. The final assembly of the DECRIS 14-2m will be done at the CC SR in Bratislava.

3

Modern problems in manual control of higly augmented aircraft

Efremov A.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

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1998

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nr 8

177-180

EN

There is briefly analyzed the new role of flight control system highly augmented aircraft, goals and problems in their design. The system approach based on deep study of regularities in pilot behavior is considered shortly as a tool for the solution of different manual control tasks. The efficiency of the system approach is demonstrated on a number of applied tasks. The specific place is dedicated to the analysis of facilities appropriated to the different stages of experimental investigations on manual control. The high efficiency of the workstation developed for solution of different manual control tasks is shown too.

4

Evaluation and prediction of aircraft handling qualities

Efremov A., Ogloblin A., Koshelenko A.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

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1998

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nr 8

169-176

EN

There is given briefly the analysis of some problems in evaluation and prediction of handling qualities (HQ) for highly augmented aircraft (HAA). There are considered the technique for definition of Cooper-Harper metrics - desired and adequate task performances (IP) and the technique for elimination of input signal on evaluation of handling qualities. Two for prediction of HQ in pitch tracking and tasks were developed. It is shown that criteria for prediction of flying qualities in pitch tracking task can be used and for evaluation of pilot-induced-tendency too. The criteria for prediction of HQ in pitch tracking and refueling tasks were obtained by investigation and standardization of pilot-vehicle characteristics in experiments on simulators with 64 and 21 dynamics configurations correspondingly.