scholarly journals The source of THz radiation based on dielectric waveguide excited by sequence of electron bunches

2016 ◽  
Vol 732 ◽  
pp. 012037 ◽  
Author(s):  
A M Altmark ◽  
A D Kanareykin
Keyword(s):  
Dielectric Waveguide ◽  
Thz Radiation ◽  
Electron Bunches

scholarly journals THz pulse doubler at FLASH: double pulses for pump–probe experiments at X-ray FELs

2018 ◽  
Vol 25 (1) ◽  
pp. 39-43 ◽  
Author(s):  
Ekaterina Zapolnova ◽  
Torsten Golz ◽  
Rui Pan ◽  
Karsten Klose ◽  
Siegfried Schreiber ◽  
...  
Keyword(s):  
Thz Radiation ◽  
Full Potential ◽  
Pump Probe ◽  
X Ray ◽  
Electron Bunches ◽  
Double Electron ◽  
Probe Experiment ◽  
Optical Paths ◽  
Pulse Energies ◽  
Temporal Overlap

FLASH, the X-ray free-electron laser in Hamburg, Germany, employs a narrowband high-field accelerator THz source for unique THz pump X-ray probe experiments. However, the large difference in optical paths of the THz and X-ray beamlines prevents utilization of the machine's full potential (e.g.extreme pulse energies in the soft X-ray range). To solve this issue, lasing of double electron bunches, separated by 28 periods of the driving radiofrequency (at 1.3 GHz), timed for the temporal overlap of THz and X-ray pulses at the experimental station has been employed. In order to optimize conditions for a typical THz pump X-ray probe experiment, X-ray lasing of the first bunch to one-sixth of that of the second has been suppressed. Finally, synchronization of THz radiation pulses was measured to be ∼20 fs (r.m.s.), and a solution for monitoring the arrival time for achieving higher temporal resolution is presented.

scholarly journals Terahertz accelerator based electron and x-ray sources

2020 ◽  
Vol 13 (1) ◽  
pp. 22-31
Author(s):  
Franz X. Kärtner
Keyword(s):  
High Field ◽  
Diagnostic Tools ◽  
Thz Radiation ◽  
Single Cycle ◽  
Time Switching ◽  
X Ray ◽  
Electron Bunches ◽  
Electron Accelerators ◽  
Wide Range ◽  
Transformative Impact

The generation and use of THz radiation for electron acceleration and manipulation of electron bunches has progressed over the last decade to a level where practical devices for THz guns, acceleration and a wide range of beam manipulations have become possible. Here, we present our progress on generation of single-cycle THz pulses at the two-hundred micro-Joule level to drive advanced acceleration and beam manipulation devices. Specifically, we use pulses centered at 0.3 THz to power a segmented terahertz electron accelerator and manipulator (STEAM) capable of performing multiple high-field operations on the 6D-phase-space of ultrashort electron bunches. Using this STEAM device, we demonstrate record THz-acceleration of >60 keV, streaking with <10 𝑓s resolution, focusing with >2 kT/m strength, compression to ~100 𝑓s as well as real-time switching between these modes of operation. The STEAM device demonstrates the feasibility of THz-based electron accelerators, manipulators and diagnostic tools enabling science beyond current resolution frontiers with transformative impact.

THz radiation based on femtosecond electron bunches and THz imaging

2010 ◽  
Author(s):  
J. Saisut ◽  
K. Kusoljariyakul ◽  
N. Kangrang ◽  
P. Wichaisirimongkol ◽  
C. Tengsirivattana ◽  
...  
Keyword(s):  
Thz Radiation ◽  
Thz Imaging ◽  
Electron Bunches ◽  
Femtosecond Electron Bunches

Dynamical effects on superradiant THz emission from an undulator

2019 ◽  
Vol 26 (3) ◽  
pp. 737-749 ◽  
Author(s):  
Gianluca Geloni ◽  
Takanori Tanikawa ◽  
Sergey Tomin
Keyword(s):  
Magnetic Field ◽  
Phase Space ◽  
Electron Bunch ◽  
Field Amplitude ◽  
Thz Radiation ◽  
Frequency Range ◽  
Output Intensity ◽  
Electron Bunches ◽  
The Impact ◽  
Longitudinal Phase

Superradiant emission occurs when ultra-relativistic electron bunches are compressed to a duration shorter than the wavelength of the light emitted by them. In this case the different electron contributions to the emitted field sum up in phase and the output intensity scales as the square of the number of electrons in the bunch. In this work the particular case of superradiant emission from an undulator in the THz frequency range is considered. An electron bunch at the entrance of a THz undulator setup has typically an energy chirp because of the necessity to compress it in magnetic chicanes. Then, the chirped electron bunch evolves passing through a highly dispersive THz undulator with a large magnetic field amplitude, and the shape of its longitudinal phase space changes. Here the impact of this evolution on the emission of superradiant THz radiation is studied, both by means of an analytical model and by simulations.

scholarly journals A Versatile THz Source from High-Brightness Electron Beams: Generation and Characterization

2020 ◽  
Vol 5 (2) ◽  
pp. 40
Author(s):  
Enrica Chiadroni ◽  
Alessandro Cianchi ◽  
Massimo Ferrario ◽  
Andrea Mostacci ◽  
Riccardo Pompili ◽  
...  
Keyword(s):  
Peak Power ◽  
Pulse Shaping ◽  
Electron Beams ◽  
Test Facility ◽  
Thz Radiation ◽  
High Peak Power ◽  
Electromagnetic Spectrum ◽  
High Brightness ◽  
Electron Bunches

Ultra-short electron bunches, such as those delivered by a high-brightness photo-injector, are suitable to produce high peak power THz radiation, both broad and narrow band, with sub-picosecond down to femtosecond pulse shaping. The features of this kind of source in the THz range of the electromagnetic spectrum are extremely appealing for frequency- and time-domain experiments in a wide variety of fields. The present manuscript will overview the method of generation and characterization of THz radiation produced by high-brightness electron beams, as those available at the SPARC_LAB test facility.

Sign in / Sign up

Export Citation Format

Share Document