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1 of plates with the period of 2.3 micron is induced. It is shown, that the scattering of the relativistic electrons on such a stacks with the period of dielectric permittivity about a few microns in amorphous quartz leads to formation of intense transition radiation. Radiated photons have the intensity ~10 photon/second and the energy 1.3 KeV in a solid angle ~30 angular seconds with the energy spread ΔE/E~10 [3]. The peak values of the energy E are coincide with γ ωpl, where γ is the Lorentz factor, and ωpl is the plasma frequency of the melted quartz [2]. The theoretical evaluation and its comparison with the experiment shows that the maximal number of plates, which gives contribution to the intensity of the transition radiation is order to 20. The problem under consideration is theoretically solved using Maxwell’s equations. Corresponding numerical calculations are carried out and conditions are found which yields to formation of the maximum number of photons. The obtained results are in good accord with the experiment [3]. [1] G.M. Garibyan and C. Yang.// Sov. Phys. JETP 36, p.631, 1973. [2] L.Sh. Grigorian, A.H. Mkrtchyan, A.A. Saharian.// Nuclear Instruments and Methods B, pp. 197-202, 1998. [3] A.R. Mkrtchyan, et al .// Physics Letters A, vol. 152, No 5,6, pp. 297-299, 1991.

Experience from operation and commissioning of the phase 1 MX beamlines at Diamond Light Source