Radiation from Relativistic Electrons in Periodic Structures "RREPS-23" & Electron, Positron, Neutron and X-ray Scattering under External Influences "Meghri-23"

On-chip beam position monitor based on Smith-Purcell radiation

18 Sept 2023, 15:20

20m

Oral Diffraction Radiation, Smith–Purcell Effect e–/e+ beams interaction in solids

Speaker

Damir Garaev

Description

In this report, we propose an on-chip beam position monitor based on the spectral analysis of the Smith-Purcell (SPR) radiation that occurs when the beam passes near periodic chains of subwavelength particles [1]. Since the SPR is quasi-monochromatic and its spectral distribution harmonically depends on the chain period, it is easy to distinguish between radiation coming simultaneously from chains of different periods. Comparing these intensities from different chains, we can draw a conclusion about the position of the beam. We discuss the pros and cons of this new scheme of a beam trajectory diagnostics compared with standard beam position monitors [2].

[1] D.I. Garaev, D.Yu. Sergeeva, A.A. Tishchenko, Theory of Smith-Purcell radiation from 2D array of small non-interacting particles, Phys. Rev. B 103, 075403 (2021).
[2] P. Forck, Beam position monitors, CERN Accelerator School: Beam diagnostics (2008).