利用康普顿后向散射产生X光源的研究
Generation of X-ray by back-Compton scattering
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摘要: 利用高能电子对电磁波的康普顿后向散射可以获得波长短、方向性好的X光辐射，这种具有亮度高、发散角小、光子能量可调等特点的辐射，有很好的应用前景。由于电子对电磁场的散射截面很小，要获得较高强度的辐射，不仅要求很强的电磁场作为散射场，而且要求电子束的亮度高；利用光阴极RF腔注入器及30MeV射频加速器产生的30MeV电子束同Nd:YAG激光光腔中的强光场作用，可以获得较高强度的康普顿后向散射，其波长为0.07~0.14nm，发光本领可以达到2.5×1011光子/s。Abstract: The high-bright X-ray can be generated by the back-Compton scattering through the laser with electron beam, and the wavelength is tunable by changing the electron energy. Because of the low scattering chance of the scattering photon with the electron, it is difficult to acquire the high-bright radiation. The high power density laser and the high-bright electron beam is required to obtain the high-bright radiation. In the experiment, the electron beam of CAEP RF photoinjector together with 30MeV linac and the high power density laser in Nd:YAG laser cavity will be used, the radiation wavelength is 0.07 0.14nm, the radiation ability expected to be about 2.5 1011 photons per second, and the radiation wavelength can be tuned by changing the electron energy.
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Key words:
- back-compton scattering /
- rf photoinjector /
- linac /
- nd:yag /
- laser cavity
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