Contribution of incoherent effects to the orientation dependence of bremsstrahlung from rapid electrons in crystal

Incoherent bremsstrahlung in flat and bent crystal

The bremsstrahlung cross section for relativistic electrons in a crystal is split into the sum of coherent and incoherent parts (the last is due to a thermal motion of atoms in the crystal). Although the spectrum of incoherent radiation in crystal is similar to one in amorphous medium, the incoherent radiation intensity could demonstrate substantial dependence on the crystal orientation due to the electrons' flux redistribution in the crystal. In the present paper we apply our method of the incoherent bremsstrahlung simulation developed earlier to interpretation of some recent experimental res…

Incoherent bremsstrahlung in flat and bent crystals

Incoherent bremsstrahlung by high-energy particles in crystal is due to the thermal spread of atoms in relation to their equilibrium positions in the lattice. The simulation procedure developed earlier for the incoherent radiation is applied to the case of the electrons and positrons motion in the sinusoidally bent crystal. The results of simulation are in agreement with the data of recent experiments carried out at the Mainz Microtron MAMI. The possibility of use of the sinusoidally bent crystals as undulators is discussed.

紧凑型超快强激光驱动晶体基γ辐射、正电子和中子源

Compact ultrafast intense LWFA-driven crystal-based source of $γ$-radiation, positrons and neutrons

提出并模拟一种紧凑型激光驱动源，结合LWFA与取向晶体靶，增强电子束向γ射线、正电子和中子的转换，产额提升约2倍，亮度提升6-8倍，并实现可调谐准单色辐射。