TY - GEN
T1 - CO2-Laser-driven dielectric laser accelerator
AU - Kimura, W. D.
AU - Poaorelsky, I. V.
AU - Schachter, Levi
N1 - Publisher Copyright: © 2018 IEEE.
PY - 2018/7/2
Y1 - 2018/7/2
N2 - In dielectric laser accelerators (DLAs), the electrons traverse through a channel whose structure period and transverse dimensions are comparable to the laser wavelength. If a 1-μm laser wavelength is used, this means the acceleration channel width must be less than or equal to 1 μm, which severely restricts the amount of charge that can be passed through the channel and places high demands on the electron beam emittance. Using a CO2 laser operating at 10 μm wavelength to drive the DLA enlarges the dimensions of the channel by 10 times. This increases the amount of charge that can be accelerated by orders of magnitude and eases the emittance requirements. As an additional improvement, we are proposing using an inverse free electron laser (IFEL), driven by a portion of the CO2 laser beam, to generate microbunches that are injected into the DLA. This allows maximizing the number of accelerated electrons and minimizing their energy spread, thereby improving the output beam quality. Other advantages of our approach include facilitating achieving phase synchronization of the microbunches within each DLA stage due to the longer laser wavelength and easing fabrication of the microstructures with acceptable tolerances because the structures are 10 times larger. To illustrate the scalability of this concept, we present a straw man design for a high-repetition-rate, high-peak-power CO2 laser system capable of driving multi-stage DLAs up to the energy and luminosity requirements for a future collider. Innovative features of this design include utilizing solid-state lasers (Fe: ZnSe) for pumping the CO2 amplifiers rather than conventional discharge pumping and recirculating laser power through the amplifiers to support high-efficiency, high-repetition-rate, multi-bunch acceleration.
AB - In dielectric laser accelerators (DLAs), the electrons traverse through a channel whose structure period and transverse dimensions are comparable to the laser wavelength. If a 1-μm laser wavelength is used, this means the acceleration channel width must be less than or equal to 1 μm, which severely restricts the amount of charge that can be passed through the channel and places high demands on the electron beam emittance. Using a CO2 laser operating at 10 μm wavelength to drive the DLA enlarges the dimensions of the channel by 10 times. This increases the amount of charge that can be accelerated by orders of magnitude and eases the emittance requirements. As an additional improvement, we are proposing using an inverse free electron laser (IFEL), driven by a portion of the CO2 laser beam, to generate microbunches that are injected into the DLA. This allows maximizing the number of accelerated electrons and minimizing their energy spread, thereby improving the output beam quality. Other advantages of our approach include facilitating achieving phase synchronization of the microbunches within each DLA stage due to the longer laser wavelength and easing fabrication of the microstructures with acceptable tolerances because the structures are 10 times larger. To illustrate the scalability of this concept, we present a straw man design for a high-repetition-rate, high-peak-power CO2 laser system capable of driving multi-stage DLAs up to the energy and luminosity requirements for a future collider. Innovative features of this design include utilizing solid-state lasers (Fe: ZnSe) for pumping the CO2 amplifiers rather than conventional discharge pumping and recirculating laser power through the amplifiers to support high-efficiency, high-repetition-rate, multi-bunch acceleration.
KW - CO laser
KW - Dielectric laser accelerator
KW - collider
KW - electron beam
UR - http://www.scopus.com/inward/record.url?scp=85063521933&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/AAC.2018.8659403
DO - https://doi.org/10.1109/AAC.2018.8659403
M3 - منشور من مؤتمر
T3 - 2018 IEEE Advanced Accelerator Concepts Workshop, ACC 2018 - Proceedings
BT - 2018 IEEE Advanced Accelerator Concepts Workshop, ACC 2018 - Proceedings
T2 - 18th IEEE Advanced Accelerator Concepts Workshop, ACC 2018
Y2 - 12 August 2018 through 17 August 2018
ER -