| TUPOST049 |
Simulation Study for an Inverse Designed Narrowband THz Radiator for Ultrarelativistic Electrons |
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- G. Yadav, C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom
- T. Feurer
Universität Bern, Institute of Applied Physics, Bern, Switzerland
- U. Haeusler, A. Kirchner
FAU, Erlangen, Germany
- B. Hermann, R. Ischebeck
PSI, Villigen PSI, Switzerland
- P. Hommelhoff
University of Erlangen-Nuremberg, Erlangen, Germany
- C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
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THz radiation has many applications, including medical physics, pump-probe experiments, communications, and security systems. Dielectric grating structures can be used to generate cost-effective and beam synchronous THz radiation based on the Smith Purcell effect. We present a 3-D finite difference time domain (FDTD) simulation study for the THz radiation emitted from an inverse designed grating structure after a 3 GeV electron bunch traverses through it. Our farfield simulation results show a narrowband emission spectrum centred around 881 um, close to the designed value of 900 um. The grating structure was experimentally tested at the SwissFEL facility, and our simulated spectrum shows good agreement with the observed one.
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