ECRIS-2014 - List of Authors (Efremov, A.A.)

Paper

Title

Page

Modernization of the mVINIS Ion Source

68

V. Bekhterev, S.L. Bogomolov, A.A. Efremov, Yu.K. Kostyukhov, N. Lebedev
JINR, Dubna, Moscow Region, Russia
D. Ciric, A.S. Dobrosavljevic, N. Nešković, I.M. Trajic, V. Vujović, Lj. Vukosavljevic
VINCA, Belgrade, Serbia

The mVINIS ECR ion source was designed and constructed jointly by the team of specialists from FLNR JINR, Dubna and Laboratory of Physics, Vinča Institute, Belgrade. It was commissioned and put in operation in 1998. From that time it was widely used in the field of modification of materials by different kinds of multiply charged ions. Recently we decided to modernize mVINIS in order to improve its operation reliability. Our main goal was to refurbish its major components (vacuum pumps, microwave generator, control system etc.). Besides, we decided to enhance basic construction of the ECR ion source in order to improve the production of multiply charged ion beams from gaseous and solid elements. We changed the shape of the plasma chamber and consequently reconstructed the magnetic structure. Also we improved the construction of the injection chamber. All these improvements resulted in substantial increase of ion beam intensities, especially in the case of high charge state ions.

WEOMMH03

Development of the Magnetic System for New DECRIS-PM Ion Source

111

A.A. Efremov, V. Bekhterev, S.L. Bogomolov
JINR, Dubna, Moscow Region, Russia
N.N. Konev
ITT-Group, Moscow, Russia

Super-heavy-element factory is under development at the Flerov Laboratory for Nuclear Reactions, JINR, Dubna. The factory will include DC-280 cyclotron, which will be equipped with two 100 kV high voltage platforms. All-permanent magnet ECRIS will be installed on one of the platforms. The request for the source is a production of medium mass ions with A/q=4-7.5 such as 48Ca⁸⁺. Results of the detailed design of a magnetic structure for DECRIS-PM will be presented.

Slides WEOMMH03 [1.165 MB]

WEOBMH02

Study of ECRIS Scaling Laws with the Particle-in-Cell Code

V. Mironov, S.L. Bogomolov, A.A. Efremov
JINR, Dubna, Moscow Region, Russia

ECRIS scaling laws for the magnetic field configuration have been experimentally established elsewhere by systematically varying the magnetic fields at the injection, extraction, radial wall and at minimum. In an attempt to clarify the reasons for such the scaling, we had performed the detailed studies of the ion dynamics in ECRIS plasma with using the PIC code. With a minimal set of free parameters, we are able to reproduce the main features of ECRIS operation, including the dynamics with variations in the magnetic field. Details of the modeling will be given, as well as some recommendations for a source improvement.

Slides WEOBMH02 [4.917 MB]

Paper	Title	Page
MOPPH016	Modernization of the mVINIS Ion Source	68
	V. Bekhterev, S.L. Bogomolov, A.A. Efremov, Yu.K. Kostyukhov, N. Lebedev JINR, Dubna, Moscow Region, Russia D. Ciric, A.S. Dobrosavljevic, N. Nešković, I.M. Trajic, V. Vujović, Lj. Vukosavljevic VINCA, Belgrade, Serbia
	The mVINIS ECR ion source was designed and constructed jointly by the team of specialists from FLNR JINR, Dubna and Laboratory of Physics, Vinča Institute, Belgrade. It was commissioned and put in operation in 1998. From that time it was widely used in the field of modification of materials by different kinds of multiply charged ions. Recently we decided to modernize mVINIS in order to improve its operation reliability. Our main goal was to refurbish its major components (vacuum pumps, microwave generator, control system etc.). Besides, we decided to enhance basic construction of the ECR ion source in order to improve the production of multiply charged ion beams from gaseous and solid elements. We changed the shape of the plasma chamber and consequently reconstructed the magnetic structure. Also we improved the construction of the injection chamber. All these improvements resulted in substantial increase of ion beam intensities, especially in the case of high charge state ions.

WEOMMH03	Development of the Magnetic System for New DECRIS-PM Ion Source	111
	A.A. Efremov, V. Bekhterev, S.L. Bogomolov JINR, Dubna, Moscow Region, Russia N.N. Konev ITT-Group, Moscow, Russia
	Super-heavy-element factory is under development at the Flerov Laboratory for Nuclear Reactions, JINR, Dubna. The factory will include DC-280 cyclotron, which will be equipped with two 100 kV high voltage platforms. All-permanent magnet ECRIS will be installed on one of the platforms. The request for the source is a production of medium mass ions with A/q=4-7.5 such as 48Ca⁸⁺. Results of the detailed design of a magnetic structure for DECRIS-PM will be presented.
	Slides WEOMMH03 [1.165 MB]

WEOBMH02	Study of ECRIS Scaling Laws with the Particle-in-Cell Code
	V. Mironov, S.L. Bogomolov, A.A. Efremov JINR, Dubna, Moscow Region, Russia
	ECRIS scaling laws for the magnetic field configuration have been experimentally established elsewhere by systematically varying the magnetic fields at the injection, extraction, radial wall and at minimum. In an attempt to clarify the reasons for such the scaling, we had performed the detailed studies of the ion dynamics in ECRIS plasma with using the PIC code. With a minimal set of free parameters, we are able to reproduce the main features of ECRIS operation, including the dynamics with variations in the magnetic field. Details of the modeling will be given, as well as some recommendations for a source improvement.
	Slides WEOBMH02 [4.917 MB]