1
|
Lemery F, Piot P, Amatuni G, Boonpornprasert P, Chen Y, Good J, Grigoryan B, Groß M, Krasilinikov M, Lishilin O, Loisch G, Oppelt A, Philipp S, Qian H, Renier Y, Stephan F, Zagorodnov I. Passive Ballistic Microbunching of Nonultrarelativistic Electron Bunches Using Electromagnetic Wakefields in Dielectric-Lined Waveguides. Phys Rev Lett 2019; 122:044801. [PMID: 30768287 DOI: 10.1103/physrevlett.122.044801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 12/17/2018] [Indexed: 06/09/2023]
Abstract
Temporally modulated electron beams have a wide array of applications ranging from the generation of coherently enhanced electromagnetic radiation to the resonant excitation of electromagnetic wakefields in advanced-accelerator concepts. Likewise producing low-energy ultrashort microbunches could be useful for ultrafast electron diffraction and new accelerator-based light-source concepts. In this Letter we propose and experimentally demonstrate a passive microbunching technique capable of forming a picosecond bunch train at ∼6 MeV. The method relies on the excitation of electromagnetic wakefields as the beam propagates through a dielectric-lined waveguide. Owing to the nonultrarelativistic nature of the beam, the induced energy modulation eventually converts into a density modulation as the beam travels in a following free-space drift. The modulated beam is further accelerated to ∼20 MeV while preserving the imparted density modulation.
Collapse
Affiliation(s)
- F Lemery
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - P Piot
- Northern Illinois Center for Accelerator & Detector Development and Department of Physics, Northern Illinois University, DeKalb Illinois 60115, USA
- Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - G Amatuni
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
- Center for the Advancement of Natural Discoveries using Light Emission, Yerevan 0040, Armenia
| | - P Boonpornprasert
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - Y Chen
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - J Good
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - B Grigoryan
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
- Center for the Advancement of Natural Discoveries using Light Emission, Yerevan 0040, Armenia
| | - M Groß
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - M Krasilinikov
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - O Lishilin
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - G Loisch
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - A Oppelt
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - S Philipp
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - H Qian
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - Y Renier
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - F Stephan
- Deutsches Elektronen-Synchrotron, Platannenallee 6, 15738 Zeuthen, Germany
| | - I Zagorodnov
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| |
Collapse
|
2
|
Marchetti B, Bacci A, Chiadroni E, Cianchi A, Ferrario M, Mostacci A, Pompili R, Ronsivalle C, Spataro B, Zagorodnov I. Novel schemes for the optimization of the SPARC narrow band THz source. Rev Sci Instrum 2015; 86:073301. [PMID: 26233366 DOI: 10.1063/1.4922882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A pulsed, tunable, narrow band radiation source with frequency in the THz region can be obtained collecting the coherent transition radiation produced by a train of ultra-short electron bunches having picosecond scale inter-distance. In this paper, we review the techniques feasible at the SPARC_LAB test facility to produce and manipulate the requested train of electron bunches and we examine the dynamics of their acceleration and compression. In addition, we show how the performances of the train compression and the radiation intensity and bandwidth can be significantly improved through the insertion of a fourth order harmonic cavity, working in the X-band and acting as a longitudinal phase space linearizer.
Collapse
Affiliation(s)
| | | | | | - A Cianchi
- "Tor Vergata" University of Rome, Rome, Italy
| | | | - A Mostacci
- "Sapienza" University of Rome, Rome, Italy
| | | | | | | | | |
Collapse
|