Proton LINAC for Transmutation
Design, Manufacture and Test of the Prototypes of Accelerating Structures for Reliable Radiation-clean High Power Proton Linac
Tech Area / Field
- FIR-REA/Reactor Concept/Fission Reactors
3 Approved without Funding
ITEF (ITEP), Russia, Moscow
- NIIGrafit, Russia, Moscow
- Los-Alamos National Laboratory, USA, NM, Los-Alamos\nJohann Wolfgang Goethe Universität / Institut für Angewandte Physic, Germany, Frankfurt am Main
Project summaryThis proposal is based on results of researches, were carried out in the framework of the ISTC project N 17, and is directed on development of a high-reliable and radiation-clean high-current proton linear accelerator (linac) for electro-nuclear energy production, utilization of weapon-grade plutonium and transmutation technologies.
The new conceptual design of such accelerator is proposed in ITEP; features of the linac are use in the resonators of the main part of the accelerator (MPA) materials, allowing to reduce considerably residual activity, and MPA construction from single-gap resonators, excited by inpidual RF generators. Preliminary evaluations show, that use of graphite as a constructional material for MPA resonators will allow lowering by a factor 102 residual radiation of the accelerator at the practically existing level of beam particle losses, which is equal 10-4. It allows solving a main linac maintenance problem at really achievable levels of accelerated particle losses. The carried out earlier investigations show practicability of the RF of resonators design with use of graphite. Main advantage of the MPA, consisting of single-gap resonators is the fact that the linac keeps the capacity to accelerate the beam in the case if one or several RF power systems of successive resonators will be broken down. Length and type of focusing period in MPA consisting of single-gap resonators is chosen only to provide the requirements of the beam loss minimization. The independent resonators phasing allow reducing distance between accelerating gaps and, therefore, to reduce length a MPA up to 50 % in comparison with use of traditional accelerating structures.
The purpose of offered work is development, manufacturing and experimental study of graphite accelerating structure prototypes of MPA. In frame of this work an experimental study of the of materials characteristics will be carried out; design and manufacture technology of the resonator will be developed. It is supposed that the work will be completed by test of resonator operation under CW RF exciting. The realization of the work is a necessary stage for creation of a high-reliable and radiation clean high-current proton linac for electro-nuclear energy production.
The development, manufacturing and test the 600 MHz graphite resonator will allow to design advanced structure for high-current linac, to reduce its length and to lower expenses on its manufacture and operation.
Expected results can also be useful for building linacs for wide range of applications, operating both at CW and pulse regime.
It is suppose to produce the following specific results:
1. Approach to minimization of particle losses and linac activation resulting from interaction of beam protons with accelerator channel materials.
2. Design of 600 MHz single-gap cavity for main part of linac.
3. Technology of manufacture graphite resonator covered inside by material with high electrical conductivity.
4. To manufacture experimental example of the single-gap graphite resonator.
5. Design and manufacture 600 MHz CW RF power supply system.
6. To obtain simulation data on thickness of graphite as an absorber of lost beam particles in resonators and quadrupole lenses of both the main and intermediate parts of an accelerator.
7. To present results of investigations of the graphite resonator prototype operation depending on CW RF power level.
8. To develop the control system conceptual block-scheme of MPA, consisting of single-gap resonators.
Results of the project will be presented by drawings, schemes, technical documents, quarter reports, pre-prints and by manufactured prototypes of both the resonator and RF generator.
A possible participation of foreign partner: Change by information, discussion of obtained scientific results, codes. Another proposals of the participants will be carefully considered. Participation of foreign partners will be encouraged.