Abstract
We propose and demonstrate a novel method to produce few-femtosecond electron beam with relatively low timing jitter. In this method a relativistic electron beam is compressed from about 150 fs (rms) to about 7 fs (rms, upper limit) with the wakefield at THz frequency produced by a leading drive beam in a dielectric tube. By imprinting the energy chirp in a passive way, we demonstrate through laser-driven THz streaking technique that no additional timing jitter with respect to an external laser is introduced in this bunch compression process, a prominent advantage over the conventional method using radio-frequency bunchers. We expect that this passive bunching technique may enable new opportunities in many ultrashort-beam based advanced applications such as ultrafast electron diffraction and plasma wakefield acceleration.
Highlights
We propose and demonstrate a novel method to produce few-femtosecond electron beam with relatively low timing jitter
In this method a relativistic electron beam is compressed from about 150 fs to about 7 fs with the wakefield at THz frequency produced by a leading drive beam in a dielectric tube
By imprinting the energy chirp in a passive way, we demonstrate through laser-driven THz streaking technique that no additional timing jitter with respect to an external laser is introduced in this bunch compression process, a prominent advantage over the conventional method using radio-frequency bunchers
Summary
Ultrashort electron beams are of fundamental interest in accelerator physics and ultrafast science communities. The main drawback of this active bunching technique is that the phase jitter in the rf cavity will be converted into timing jitter after compression [23,24] This is because the rf phase jitter leads to variation of the beam centroid energy, which is further translated to variation of time-of-flight after passing through a dispersive element. Negligible additional timing jitter with respect to an external laser due to the fact that the wakefield is naturally synchronized with the electron beams. This passive bunching technique is cost effective, easy to implement, and should find wide applications in many ultrashort-beam based advanced applications
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
