Using irregularly spaced current peaks to generate an isolated attosecond X-ray pulse in free-electron lasers
| Autor: | Yuichiro Kida, Takashi Tanaka, Chi Hyun Shim, Ryota Kinjo, Eduard Prat, Byung-Hoon Kim, Yong Woon Parc, In Soo Ko, Dong Eon Kim |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Free electron model Nuclear and High Energy Physics Radiation 010308 nuclear & particles physics business.industry Attosecond Free-electron laser Pulse duration free electron laser Laser Research Papers terawatt power level 01 natural sciences Pulse (physics) law.invention Optics law 0103 physical sciences Cathode ray attosecond pulse 010306 general physics business Instrumentation Order of magnitude |
| Zdroj: | Journal of Synchrotron Radiation |
| ISSN: | 1600-5775 |
| Popis: | A method is proposed to generate an isolated attosecond X-ray free-electron laser pulse with the peak power beyond 1 TW. A method is proposed to generate an isolated attosecond X-ray pulse in free-electron lasers, using irregularly spaced current peaks induced in an electron beam through interaction with an intense short-pulse optical laser. In comparison with a similar scheme proposed in a previous paper, the irregular arrangement of current peaks significantly improves the contrast between the main and satellite pulses, enhances the attainable peak power and simplifies the accelerator layout. Three different methods are proposed for this purpose and achievable performances are computed under realistic conditions. Numerical simulations carried out with the best configuration show that an isolated 7.7 keV X-ray pulse with a peak power of 1.7 TW and pulse length of 70 as can be generated. In this particular example, the contrast is improved by two orders of magnitude and the peak power is enhanced by a factor of three, when compared with the previous scheme. |
| Databáze: | OpenAIRE |
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