| Title |
Development of a Linac for Injection of Ultrashort Electron Bunches Into Laser Plasma Electron Accelerators |
| Authors |
- S. Masuda, N. Kumagai, T. Masuda, Y. Otake
JASRI, Hyogo, Japan
- Y. Koshiba, S. Otsuka
Waseda University, Tokyo, Japan
- T. Sakai, T. Tanaka
LEBRA, Funabashi, Japan
- K. Sakaue
The University of Tokyo, The School of Engineering, Tokyo, Japan
|
| Abstract |
We are developing a C-band linac that produces ultrashort electron bunches as an injector for laser plasma accelerators. A plasma wave excited by a high intense ultrashort laser pulse has a wavelength of the order of 10 to 100 fs and transverse dimensions of the order of 10 to 100 um. To inject the bunch into a proper phase of the plasma wave, a length and transverse sizes of the bunch must be much smaller than the plasma wave structure. A laser triggered photo cathode electron RF-gun and a 2pi/3 mode traveling wave buncher with 24 cells for ultrashort electron bunch production have been developed based on electron beam tracking simulations that show the bunch length is less than 10 fs with a charge of 100 fC at a focus on the plasma wave. The simulations also show that sufficiently small transverse sizes of the bunch at the focus can be obtained by a Q triplet. A highly accurate timing lower than the plasma wavelength (~10fs) is required for the synchronization between the electron bunch injection and the plasma wave excitation. An RF master oscillator with low SSB phase noise (-150dBc/Hz@10MHz) has been developed for the synchronization. We will report present development status.
|
| Funding |
This work is supported by JST-Mirai Program Grant Number JPMJMI17A1, Japan. |
| Paper |
download WEPAB055.PDF [0.921 MB / 3 pages] |
| Export |
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| Conference |
IPAC2021 |
| Series |
International Particle Accelerator Conference (12th) |
| Location |
Campinas, SP, Brazil |
| Date |
24-28 May 2021 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Liu Lin (LNLS, Campinas, Brazil); John M. Byrd (ANL, Lemont, IL, USA); Regis Neuenschwander (LNLS, Campinas, Brazil); Renan Picoreti (LNLS, Campinas, Brazil); Volker R. W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-214-1 |
| Online ISSN |
2673-5490 |
| Received |
19 May 2021 |
| Accepted |
15 July 2021 |
| Issue Date |
29 August 2021 |
| DOI |
doi:10.18429/JACoW-IPAC2021-WEPAB055 |
| Pages |
2725-2727 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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