Coherent transition and diffraction radiation from a bunched 6.1MeV electron beam

Naumenko, G. A.; Aleinik, A. N.; Aryshev, Alexander; Kalinin, B. N.; Потылицын, А. П.; Saruev, G.A.; Sharafutdinov, A.

doi:10.1016/j.nimb.2004.07.013

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…The θ-scan of the radiation intensity is shown in figure 7. In contrast to the CTR or CDR from a slit [25] the θ-scan contains a single maximum along the specular reflection direction because here CDR is generated by a target edge only (see figure 7). The interferogram measured for θ = θ m /2, where θ m is the angle of specular reflection, is presented in the insertion in figure 8.…”

Section: Measurement Resultsmentioning

confidence: 99%

Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train

et al. 2018

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Electron beams of most accelerators have a bunched structure and are synchronized with the accelerating RF field. Due to modulation of the electron beam with frequency ν RF one can expect to observe resonances with frequencies ν k=k⋅ ν RF in radiation spectrum generated via any spontaneous emission mechanism (k is an integer and the resonance order). In this paper we present the results of spectral measurements of coherent transition radiation (CTR) generated by an electron bunch train from the Tomsk microtron with ν RF=2.63GHz in the spectral frequency range from 8 to 35 GHz. We also measured the spectrum of coherent diffraction radiation and demonstrated that the observed spectra in both cases consist of monochromatic lines. For spectral measurements the Martin-Puplett interferometer with spectral resolution of 800 MHz (FWMH) was employed. Using a waveguide frequency cut-off we were able to exclude several spectral lines to observe higher resonance orders of up to k =7.

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Section: Measurement Resultsmentioning

confidence: 99%

Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train

et al. 2018

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“…An easier method of generating high intensity and tuneable THz radiation using an ultrafast electron accelerator is the coherent transition radiation (CTR). CTR occurs when a charged particle passes through an interface between media with different dielectric constants [52][53][54][55]. Sudden change in the dielectric constants along the electron's path causes a discontinuity in the electric field at the interface and this discontinuity readjusts itself as radiation spreading out from the point where the electron passes through the discontinuity.…”

Section: Thz Transmission or Absorption Spectroscopymentioning

confidence: 99%

“…Direction of propagation and the intensity distribution of the CTR with respect to the angle of incidence of the electron pulse on the target has been discussed in detail in Ref. [53].…”

Section: Thz Transmission or Absorption Spectroscopymentioning

confidence: 99%

Probing Biological Water Using Terahertz Absorption Spectroscopy

Mitra¹,

Palit²

2022

Terahertz Technology

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Hydrogen bonding properties of water molecules, which are confined in microcavities of biological interfaces, are significantly different from those of bulk water and drive most of the complex biological processes. While NMR, X-ray and UV–vis-IR spectroscopic techniques have been found inadequate for describing the dynamics of the thick (20–40 Å) sheath of hydration layer around biomolecules, recently developed THz spectroscopy has emerged as a powerful technique to directly probe the collective dynamics of hydrogen bonds in the hydration layer, which control all important functions of the biomolecules in life. Both laser and accelerator-based THz sources are intense enough to penetrate up to about 100 μm thick water samples, which makes THz transmission and/or dielectric relaxation measurements possible in aqueous solutions. These measurements provide valuable information about the rattling and rotational motions of hydrated ions, making, breaking and rearrangement of hydrogen bonds in hydration layer as well as hydrophilic and hydrophobic interactions between biomolecule and water. THz spectroscopy has also been successfully applied to study the effect of modulation of the physical conditions, like temperature, pH, concentration of proteins and chemical additives, on the structure and dynamics of hydration layer. THz spectroscopy has also been applied to study the processes of denaturation, unfolding and aggregation of biomolecules.

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Investigations on collective behavior in radiation process with random walk model

Xiang

Huang

2005

Nuclear Instruments and Methods in Physics Research Section B:

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Coherent transition and diffraction radiation from a bunched 6.1MeV electron beam

Cited by 5 publications

References 11 publications

Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train

Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train

Probing Biological Water Using Terahertz Absorption Spectroscopy

Investigations on collective behavior in radiation process with random walk model

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