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Transport of Hydrogen Ions

#0934


Investigation of the Elementary Processes Acting on Production and Transport of Intensive Beams of Negative Hydrogen Ions

Tech Area / Field

  • PHY-ANU/Atomic and Nuclear Physics/Physics

Status
3 Approved without Funding

Registration date
30.03.1997

Leading Institute
Kurchatov Research Center / Institute of Nuclear Fusion, Russia, Moscow

Supporting institutes

  • Russian Academy of Sciences / Physical Technical Institute, Russia, St Petersburg

Collaborators

  • Université Catholique de Louvain / Unit / FYAM, Belgium, Louvain-la-Neuve\nEcole Polytechnique Federale de Lausanne / Laboratoire de Physique de Milieux Ionisés, France, Palaiseau

Project summary

The project aim is to develop and optimize a promising technology for production and transport of intense - high energy - negative hydrogen ion beams to long distances. Such beams are necessary for heating high temperature plasma to realize a fusion reaction, to support subcritical operating conditions in the reactors. This technology is also important for such tasks as the design and construction of high current accelerators, as well as sounding of objects in space.

For enhancing the negative intense hydrogen ion beam power efficiency of transfer to great distances one should know the quantitative characteristics of elementary processes affecting their production and transport. The goal of the Project is to produce the most important characteristics, unknown at present. As a result of Project realization the following data are expected to be produced:


1. Energy dependence of the absolute effective cross section value of the ion-molecular reaction resulting in the production of Нз+ ion in mutual collisions between molecular ions in the ion source plasmas used for creating the negative hydrogen ion beams and essentially-affecting the efficiency of their production.
2. Energy dependencies of effective cross sections for the electron loss processes by one and two negative hydrogen ions simultaneously in their mutual collisions within an ion beam that results in their withdrawal from further acceleration.

The data obtained will allow us to perform a thorough analysis of methods for increasing efficiency of beam heating of hot plasma, including those used in realization of the ITER program.

To perform the planned work on the Project, highly qualified scientific and technical personnel of RRC KI and РTI RAS will be invited.

Participation of scientists of the mentioned institutions involved in military defense researches is justified by the fact that the area of their knowledge, interests and experience corresponds largely to the subject and requirements for the project realization: separation of weak signals superimposed on a large background, investigation of collision processes at low energies corresponding to the velocities of motion to micro-particles and macro-objects in the upper atmosphere, precise spatial formation of ion and electron beams. Such orientation of the activity of these scientists will promote successful realization of the Project, which has purely peaceful directions, in full agreement with the aims of ISTC.

Experimental study will be made, using the splited beam method developed at INF RR.C KI, which permits the measurement of cross sections for processes occurring in mutual collisions of identical ions.

Potential role of foreign collaborators

The authors of the Project believe that the results obtained in the course of its realization will be important and useful for many physicists from different laboratories in the world working on the problems of atomic collision physics and plasma physics, in particular;


1. R.K. Janel - IAEA, Vienna, Austria.
2. D.E.Post - PPPL, Princeton, USA,
3. R,A.Phaneuf - University of Nevada - Reno, USA.
4. H.B.Gilbody - Department of Pure and Applied Physics, The Queen's University of Belfast, North Ireland, UK.
5. F.J.de Heer - FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands.


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