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Updated: Jul 18, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Observation of grating diffraction radiation at the KEK LUCX facility
A Aryshev1, A P Potylitsyn2, G A Naumenko3
1KEK: High Energy Accelerator Research Organization, 1-1 Oho, Ibaraki, 305-0801, Tsukuba, Japan. alar@post.kek.jp.
Scientific Reports
|May 7, 2020
Summary
Scientists developed a new tunable terahertz (THz) radiation source using coherent grating diffraction radiation (GDR). This method offers high intensity and broad spectral tunability for advanced scientific applications.
Area of Science:
- Physics
- Engineering
- Optics
Background:
- Demand for narrow-band terahertz (THz) sources with sub-picosecond pulses.
- Limitations in spectral tunability of existing monochromatic emitters like Smith-Purcell radiation sources.
Purpose of the Study:
- Investigate coherent grating diffraction radiation (GDR) as a tunable THz source.
- Demonstrate comparable intensity and wide spectral tunability of GDR.
- Explore bandwidth selection capabilities of GDR.
Main Methods:
- Experimental investigation of coherent grating diffraction radiation (GDR).
- Characterization of spectral, spatial, and polarization properties.
- Comparative analysis of GDR intensity with other coherent radiation sources.
Main Results:
- Confirmed comparable radiation intensity with fine-tuning across a wide spectral range.
- Demonstrated bandwidth selection at the same central frequency.
- Experimental validation of GDR's spectral, spatial, and polarization characteristics.
Conclusions:
- Coherent grating diffraction radiation (GDR) offers a promising solution for tunable THz sources.
- GDR provides a viable alternative to existing sources with enhanced tunability and intensity.
- Paves the way for tabletop, wide-range tunable quasi-monochromatic or multi-color radiation sources in the GHz-THz range.
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