EFFECTIVE X-RAY BREMSSTRAHLUNG SOURCE (Is it possible to handle quality of the X-ray bremsstrahlung?)

The efficiency of new nontraditional scheme for generating bremsstrahlung is studied by means of computer simulation. In this scheme the electron beam multiply crosses a thin target due to the presence of special focusing magnetic field [1]. It is showed that one could expect more than two times increasing of the radiation yield power. 1 NEW SCHEME OF EFFECTIVE BREMSSTRAHLUNG SOURCE The X-ray radiation is widely used in various fields of fundamental and applied studies [2]. The mostly widespread X-ray source is based on the generation of hard electromagnetic radiation by hitting the bremsstrahlung target with the beam of accelerated electrons. Unfortunately, the efficiency of the translation of the electrons energy into the X-ray radiation yield is very low. Hence if the electron beam energy is E0=1-5 MeV then radiation yield does not exceed 3-8% of the energy of the beam of electrons [3,4]. But analysis shows that the electron energy lost to produce bremsstrahlung is about 3 times more than corresponding radiation yield from the target (Fig. 1). Hence a significant portion of the electromagnetic radiation generated is absorbed in the bremsstrahlung target. A new nontraditional scheme of the generation of bremsstrahlung is proposed in [1]. This method allows to expect a considerable growth of the photons yield. The scheme is based on the multiple crossing of the thin target by the electron beam. The self-absorption of the generated radiation is not intensive in a thin target. But if the total (summarized) thickness of the multiply crossed target is comparable to the thickness of usual one then the total yield is considerably higher. The scheme with the multiple crossing of the target by electrons can be developed in various layouts dependently on the parameters of an accelerator and on the way of using bremsstrahlung. One of the schemes is shown on Fig. 2. Here electrons cross the target, loss a certain part of their energy and then due to the presence of magnetic field they turn back to the target and produce the radiation again. Accordingly to the estimations presented in [1] the energy yield of the radiation after multiple crossing is 2 4 times (in various ranges of the photons energy) more than the one in traditional way.