Phase control with two-beam interferometry method in a terahertz dielectric wakefield accelerator
Abstract
High-gradient, beam-driven wakefield acceleration in THz structures is a promising technology for future free electron lasers and colliders. In this scheme, the main beam is accelerated by the wakefield of the high current drive beam. The time separation between the main and drive beams has to be chosen carefully to ensure that the main beam is in an accelerating phase of the drive's wakefield. THz accelerating structures provide high gradient acceleration due to their small apertures, but their phase control is difficult due to the picosecond-scale period. Here, we report on a wakefield acceleration experiment in a 460 GHz dielectric wakefield accelerator (DWA). The optimum phase of the main beam during the experiment is determined with a two-beam wakefield interferometry (TBI) measurement. This is performed without the measurement of the main and drive beam bunch lengths or their separation. In TBI, the interference of the wakefields produced by the drive and main beams is measured with an integrating THz detector. The TBI signal, as a function of separation between the drive and main beams, exhibits a minimum due to destructive interference of these wakefields, which corresponds to maximum acceleration of the main beam as is confirmed by the energy spectrometermore »
- Authors:
-
[1];
[1];
[1];
- Tsinghua Univ., Beijing (China). Dept. of Engineering Physics
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1489528
- Grant/Contract Number:
- AC02-06CH11357; NSFC/11475097; 2013YQ12034504
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 111; Journal Issue: 17; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; Colliders; Photocathodes; Terahertz radiation; Optical reflectors; Plasma acceleration; Animal sounds; Radiation detectors; Dielectric properties; Interferometry; Free electron lasers
Citation Formats
Wang, Dan, Su, Xiaolu, Yan, Lixin, Du, YingChao, Tian, Qili, Liang, Yifan, Niu, Lujia, Huang, Wenhui, Gai, Wei, Tang, Chuanxiang, and Antipov, Sergey. Phase control with two-beam interferometry method in a terahertz dielectric wakefield accelerator. United States: N. p., 2017.
Web. doi:10.1063/1.4999959.
Wang, Dan, Su, Xiaolu, Yan, Lixin, Du, YingChao, Tian, Qili, Liang, Yifan, Niu, Lujia, Huang, Wenhui, Gai, Wei, Tang, Chuanxiang, & Antipov, Sergey. Phase control with two-beam interferometry method in a terahertz dielectric wakefield accelerator. United States. https://doi.org/10.1063/1.4999959
Wang, Dan, Su, Xiaolu, Yan, Lixin, Du, YingChao, Tian, Qili, Liang, Yifan, Niu, Lujia, Huang, Wenhui, Gai, Wei, Tang, Chuanxiang, and Antipov, Sergey. Thu .
"Phase control with two-beam interferometry method in a terahertz dielectric wakefield accelerator". United States. https://doi.org/10.1063/1.4999959. https://www.osti.gov/servlets/purl/1489528.
@article{osti_1489528,
title = {Phase control with two-beam interferometry method in a terahertz dielectric wakefield accelerator},
author = {Wang, Dan and Su, Xiaolu and Yan, Lixin and Du, YingChao and Tian, Qili and Liang, Yifan and Niu, Lujia and Huang, Wenhui and Gai, Wei and Tang, Chuanxiang and Antipov, Sergey},
abstractNote = {High-gradient, beam-driven wakefield acceleration in THz structures is a promising technology for future free electron lasers and colliders. In this scheme, the main beam is accelerated by the wakefield of the high current drive beam. The time separation between the main and drive beams has to be chosen carefully to ensure that the main beam is in an accelerating phase of the drive's wakefield. THz accelerating structures provide high gradient acceleration due to their small apertures, but their phase control is difficult due to the picosecond-scale period. Here, we report on a wakefield acceleration experiment in a 460 GHz dielectric wakefield accelerator (DWA). The optimum phase of the main beam during the experiment is determined with a two-beam wakefield interferometry (TBI) measurement. This is performed without the measurement of the main and drive beam bunch lengths or their separation. In TBI, the interference of the wakefields produced by the drive and main beams is measured with an integrating THz detector. The TBI signal, as a function of separation between the drive and main beams, exhibits a minimum due to destructive interference of these wakefields, which corresponds to maximum acceleration of the main beam as is confirmed by the energy spectrometer measurement. The maximum energy gain of 0.8 MeV and maximum energy loss of 1.2 MeV for the main beam have been measured, which agrees well with theoretical predictions. Published by AIP Publishing.},
doi = {10.1063/1.4999959},
journal = {Applied Physics Letters},
number = 17,
volume = 111,
place = {United States},
year = {Thu Oct 26 00:00:00 EDT 2017},
month = {Thu Oct 26 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Radiation of a charge in dielectric concentrator for Cherenkov radiation: Off-axis charge motion
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