Observation of copious emission at the fundamental frequency by a Smith-Purcell free-electron laser with sidewalls

Gardelle, J.; Modin, P.; Donohue, J.T.

doi:10.1063/1.3696381

Cited by 19 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This so-called Smith-Purcell radiation (SPR) is emitted over a broad spectrum with the wavelength of the emitted photons being correlated to the angle of emission [14]. The SPR is always at a higher frequency than the backward wave, except when the fundamental is confined laterally on a scale comparable to its wavelength [15]. When the electron beam is bunched by the backward wave interaction the SPR power is dramatically increased and is strongly peaked at angles corresponding to harmonics of the bunching frequency [16].…”

Section: High-power Compact Thz Radiation Sourcementioning

confidence: 99%

Accelerators for Discovery Science and Security applications

Todd

Bluem

Jarvis

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

a b s t r a c t Several Advanced Energy Systems (AES) accelerator projects that span applications in Discovery Science and Security are described. The design and performance of the IR and THz free electron laser (FEL) at the Fritz-Haber-Institut der Max-Planck-Gesellschaft in Berlin that is now an operating user facility for physical chemistry research in molecular and cluster spectroscopy as well as surface science, is highlighted. The device was designed to meet challenging specifications, including a final energy adjustable in the range of 15-50 MeV, low longitudinal emittance (<50 keV-psec) and transverse emittance (<20 p mmmrad), at more than 200 pC bunch charge with a micropulse repetition rate of 1 GHz and a macropulse length of up to 15 ls. Secondly, we will describe an ongoing effort to develop an ultrafast electron diffraction (UED) source that is scheduled for completion in 2015 with prototype testing taking place at the Brookhaven National Laboratory (BNL) Accelerator Test Facility (ATF). This tabletop X-band system will find application in time-resolved chemical imaging and as a resource for drug-cell interaction analysis. A third active area at AES is accelerators for security applications where we will cover some top-level aspects of THz and X-ray systems that are under development and in testing for stand-off and portal detection.

show abstract

Section: High-power Compact Thz Radiation Sourcementioning

confidence: 99%

Accelerators for Discovery Science and Security applications

Todd

Bluem

Jarvis

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

show abstract

“…However, VEDs can hardly reach the frequency as high as 1 THz and FELs require tremendous costs and cumbersome peripheral equipment. The radiation sources based on the Smith-Purcell radiation (SPR) [6] can avoid the disadvantages of both VEDs and FELs, affording promising ways for developing compact terahertz sources [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Free-electron Driven Terahertz Wave Sources Based on Simth-Purcell Effect

Liu¹,

Yu²,

Tao³

2022

Plasma Science and Technology

View full text Add to dashboard Cite

Terahertz electromagnetic wave is one of the hottest research topics in nowadays scientific world thanks to its broad applications in material characterization, medical imaging, wireless communication, and security checking etc. Using free-electron beams to interact with periodic structures via the famous Smith-Purcell effect is an efficient way of generating high-power terahertz radiation. In this chapter, we introduce the basic theory and latest developments of the terahertz radiation schemes using a free-electron beam (including continuous electron beam, a single electron bunch, and a train of electron bunches, etc.) to interact with periodic electromagnetic structures, including grating, surface plasmonics, and subwavelength hole arrays, via a special Smith-Purcell effect or Cherenkov-like effect. A kind of free-electron lasers based on the special Smith-Purcell radiation in the terahertz region is proposed and investigated, which can be developed as high-power terahertz wave sources for practical applications.

show abstract

“…Yet, VEDs can hardly reach the frequency as high as 0.5 THz and FELs are complained for their tremendous costs and cumbersome peripheral equipments. The radiation sources based on the Smith-Purcell radiation (SPR) [7] can avoid the disadvantages of both VEDs and FELs, affording promising ways for developing compact terahertz sources [8][9][10][11][12]. Unfortunately, the efficiencies of ordinary SPRs are generally quite low, which greatly restricts the power and efficiency of the terahertz sources based on them [13].…”

Section: Introductionmentioning

confidence: 99%

Spectrum discretization of Smith–Purcell radiation for efficient multicolor terahertz emission

Li¹,

Liu²,

Liu³

2020

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The Smith-Purcell radiation (SPR) is a promising way for developing compact and high power terahertz sources with broad application prospects. Yet, the conventional SPR is largely restricted by its low efficiency and incoherency. Here we illustrate an enhanced coherent SPR from a compound array of deep-narrow-rectangular-grooves (DNRGs). We show, by detailed theoretical analysis and simulations, that each DNRG is an effective resonant cavity with low radiating Q-factor and a cluster of closely adjacent DNRGs can get enhanced coherent emission. More notably, by setting clusters of DNRGs with gradient shapes to be periodically arranged in an array, we can change the conventional incoherent SPR to be a coherent emission with a series of specified frequencies at specified directions, namely, the radiation is discretized. The total radiation efficiency can be increased by more than an order of magnitude. Thus, it affords an efficient way for high power multicolor terahertz generations.

show abstract

Observation of copious emission at the fundamental frequency by a Smith-Purcell free-electron laser with sidewalls

Cited by 19 publications

References 19 publications

Accelerators for Discovery Science and Security applications

Accelerators for Discovery Science and Security applications

Free-electron Driven Terahertz Wave Sources Based on Simth-Purcell Effect

Spectrum discretization of Smith–Purcell radiation for efficient multicolor terahertz emission

Contact Info

Product

Resources

About