ECOLOGICALLY CLEAN ACCELERATOR FOR NUCLEAR PHYSICS RESEARCH

V.G. Kurakinª, A.V. Koltsov

Lebedev Physical Institute of Russian Academy of Sciences, Moscow, Russia

Abstract

Rigid ecological requirements to human activity including industry and science force to search for specific technologies to reduce the undesired influence on nature. High intensity accelerators belong to the objects that produce radioactive waste. We have studied rf accelerator schema where the electron beam used is directed again into the same accelerator with appropriate phase in order to reduce beam energy down to acceptable level and in such a way to reduce radioactive problem for environment (beam energy recovering). In addition, this reduces background at experimental area as well as saves rf power in the case of superconducting rf cavities.

The following main processes have been taken into account while considering beam emittance degradation in a target: multiple electron scattering, ionization losses and bremsstrahlung. The first one results in transverse beam emittance growth while the latter two result in beam energy losses and energy spectrum width growth as well. Appropriate calculations have bean made and various plots have been presented. Critical target parameters namely target material nuclei charge as well as target thickness that allows leave a possibility the recovering process can be defines from these plots.

ª – corresponding author

Paper 

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