Results 31 to 40 of about 78,821 (320)
A spectral comparison of lightning discharge plasma and laser-induced air plasma
AIP Advances, 2022 The high time-resolved spectrum of natural lightning is obtained by a slitless spectrograph. The spectrum of natural lightning is compared to the spectrum of laser-induced air plasma.
Jianyong Cen +4 more
doaj +1 more source
Laser cooling with ultrafast pulse trains [PDF]
Phys Rev A 73, 063407 (2006), 2003 We propose a new laser cooling method for atomic species whose level structure makes traditional laser cooling difficult. For instance, laser cooling of hydrogen requires vacuum-ultraviolet laser light, while multielectron atoms need laser light at many widely separated frequencies.
arxiv +1 more source
Applied Sciences, 2021 The current measurement system of surface scattering rate applied in laser protective materials has the defects of low accuracy, discontinuous diagnosis region and narrow infrared measuring waveband.
Zhen Yang +5 more
doaj +1 more source
Normal Gas-Rich Galaxies in the Far-Infrared: The Legacy of ISOPHOT [PDF]
, 2005 Following on from IRAS, the ISOPHOT instrument on board the Infrared Space Observatory (ISO) has provided a huge advancement in our knowledge of the phenomenology of the far-infrared (FIR) emission of normal galaxies and the underlying physical processes.
arxiv +1 more source
Realizing 3D Spectral Imaging in the Far-Infrared: FIFI LS [PDF]
, 2000 We present a progress report on the design and construction of the Field-Imaging Far-Infrared Line Spectrometer (FIFI LS) for the SOFIA airborne observatory. The design of the instrument is driven by the goal of maximizing observing efficiency, especially for observations of faint, extragalactic objects.
arxiv +1 more source
The interstellar gas seen in the mid- and far-infrared: The promise of SPICA Space Telescope [PDF]
, 2009 The mid- and far-IR spectral ranges are critical windows to characterize the physical and chemical processes that transform the interstellar gas and dust into stars and planets. Sources in the earliest phases of star formation and in the latest stages of stellar evolution release most of their energy at these wavelengths.
arxiv +1 more source
Longitudinal Laser Shaping in Laser Wakefield Accelerators [PDF]
Phys.Lett.A296:125-130,2002, 2000 We study the energetics of wake excitation during the laser-plasma interaction in application to laser wakefield accelerators. We find that both the wake amplitude and the accelerating efficiency (transformer ratio) can be maximized by properly shaping the longitudinal profile of the driving laser pulse.
arxiv +1 more source
Complicated cataract in patients with peripheral uveitis: surgical treatment
Офтальмохирургия, 2018 Purpose. Analysis of results in surgical treatment of patients with complicated cataract development associated with peripheral uveitis.Material and methods.
E. V. Ivanova, Y. I. Khoroshikh
doaj +1 more source
Hybrid (Oscillator-Amplifier) Free Electron Laser and New Proposals
Applied Sciences, 2021 The present work analyses a hybrid free electron laser (FEL) scheme where the oscillator is based on a radiation source operating with a slow-wave guiding structure as, for instance, a Cerenkov FEL or a Smith–Purcell FEL.
Andrea Doria
doaj +1 more source
Resolving debris discs in the far-infrared: early highlights from the DEBRIS survey [PDF]
, 2010 We present results from the earliest observations of DEBRIS, a Herschel Key Programme to conduct a volume- and flux-limited survey for debris discs in A-type through M-type stars. PACS images (from chop/nod or scan-mode observations) at 100 and 160 micron are presented toward two A-type stars and one F-type star: beta Leo, beta UMa and eta Corvi.
arxiv +1 more source