Coherent transition radiation from femtosecond electron bunches at the accelerator-based THz light source in Thailand

Saisut, J.; Chaisueb, Natthawut; Thongbai, C.; Rimjaem, S.

doi:10.1016/j.infrared.2018.06.013

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Fig 2 shows model of a device, which consisted of electron source and terahertz low-gain free electron laser (THz-FEL) oscillator [80] [82]. The THz radiation source based on electron linear accelerator (linac) was introduction in [81] [83]. In order to simultaneously stabilize a series of terahertz (THz) source devices [88], a frequency reference source based on the optical combs was proposed in [84].…”

Section: A the Thz Sourcesmentioning

confidence: 99%

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Ren

Zahid

Fan

et al. 2019

Trends in Food Science & Technology

124

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Past few years have witness a dramatic change in the field of terahertz (THz) technology. The recent advancements in the technology for generation, manipulation and detection exploiting THz radiation have brought revolution in the field. Many researchers around the world have been inspired by the potential of invaluable new applications of THz sensing for food and water contamination detection. The microbial pollution in water and food is one the crucial issues with regard to the sanitary state for drinking water and daily consumption of food. To address this risk, the detection of microbial contamination is of utmost importance since the consumption of insanitary or unhygienic food can lead to catastrophic illness. This paper presents a first-time review of the open literature focused on the advances in the THz sensing for microbiological contamination of food and water and state-of-theart network architectures, applications, industrial trends and recent developments. Finally, open challenges and future research directions are presented with in the field.

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Section: A the Thz Sourcesmentioning

confidence: 99%

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Ren

Zahid

Fan

et al. 2019

Trends in Food Science & Technology

124

View full text Add to dashboard Cite

show abstract

“…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%

“…Moreover, the shorter the bunch length, the broader is the radiation spectrum that can be generated. The Gaussian electron bunches with bunch lengths of 100, 200 and 300 fs can provide broadband radiation spectra covering the wavenumbers up to about 220, 110 and 70 cm À1 (or 6.6, 3.33 and 2.1 THz), respectively [55].…”

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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Accelerator-based terahertz transmission imaging at the PBP-CMU Electron Linac Laboratory in Thailand

Jitvisate

Rimjaem

Saisut

et al. 2019

Infrared Physics & Technology

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Coherent transition radiation from femtosecond electron bunches at the accelerator-based THz light source in Thailand

Cited by 4 publications

References 20 publications

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Probing Biological Water Using Terahertz Absorption Spectroscopy

Accelerator-based terahertz transmission imaging at the PBP-CMU Electron Linac Laboratory in Thailand

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