Novel THz radiation source based on compact linear accelerator.

Marie Curie Research Fellow: Konstantin Lekomtsev

Research objectives:

• to investigate Cherenkov and Smith - Purcell mechanisms for THz radiation generation using EM simulation tools and propose an efficient target configuration and observation geometry;

• to build a radiation source that provides high peak power levels and based on a compact linear accelerator technology with a fs-duration beam;

• to evaluate possible applications of the investigated radiation mechanisms for beam position and bunch length diagnostics;

• to provide knowledge exchange between partner organisations and other interested parties via seminars, satellite and progress meetings, conferences and workshops;

• to improve public awareness about the ongoing research via outreach activities;

• to develop project management skills.

Generation of THz radiation from dielectric mm-scale capillaries with reflectors.

Demonstrated that coherent Smith Purcell Radiation, with intensity comparable to that of coherent Transition Radiation, can be generated as a result of introducing a corrugation in a mm-scale dielectric capillary and can be emitted through an outer dielectric boundary not covered by a reflector.

Detailed information on https://doi.org/10.1016/j.nimb.2017.02.058

Brief description of experiment

Driver-witness electron beam acceleration in dielectric mm-scale capillaries.

We investigated a corrugated mm-scale capillary as a compact accelerating structure in the driver- witness acceleration scheme, and suggested a methodology to measure the acceleration of the witness bunch. The maximum measured acceleration of 170 keV/m at 20 pC driver beam charge was achieved for off-axis beam propagation. The driver bunch showed an increase in energy spread of up to 11%, depending on the capillary geometry and beam propagation, with a suppression of the longitudinal energy spread in the witness bunch of up to 15%.

Detailed information on https://doi.org/10.1103/PhysRevAccelBeams.21.051301

Brief description of drive-witness experiment

Investigations of electron beam diagnostics capabilities of ChSPR.

Beam diagnostics capabilities of ChSPR from mm-scale dielectric capillaries K. Lekomtsev et al., report RREPS 2017/ AGTAX 2017.

Virginia Diodes QOD detector test.

Test details

Papers.

Related Publications