THOMSON ELECTRON X-RAY SOURCE FOR MEDICAL APPLICATIONS E.G. BESSONOV1, R.M. FESHCHENKO1*, M.V. GORBUNKOV1, V.I. SHVEDUNOV2 and A.V. VINOGRADOV1 1 2 P.N. Lebedev Physical Institute, 119991 Russia, Moscow Leninskii Prospect 53 Nuclear Physics Institute of Moscow State University, 119899 Russia, Moscow, Vorobyevy Gory Abstract A source of medical x-rays based on a 50 Mev storage ring and a quasi-continues picosecond laser is considered. ... Then the storage ring emittance is 0.1 mmmrad. ...