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Development of a Free-Electron Laser in the Terahertz Region
ISOYAMA; G. Development of a Free-Electron Laser in the Terahertz Region JAS4QoL 2020, 6(1) 2 online at: https://as4qol.org/2JCCK
Categories: > Mini Reviews, > Volume 6, Journal Articles, Volumes
Tags: Electron, Far-Infrared, Free Electron Laser (FEL), ISOYAMA; Goro, Linear Accelerator (Linac), Mini Review, Terahertz (THz)
Development of a Free-Electron Laser in the Terahertz Region
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan (isoyama@sanken.osaka-u.ac.jp)
We have been developing a free-electron laser (FEL) in the far-infrared or terahertz (THz) region for higher intensity and stability, using the L-band (1.3 GHz) electron linear accelerator (linac) at the Institute of Scientific and Industrial Research (ISIR), Osaka University. The FEL was progressively upgraded, and the maximum energy of micropulses, which form an FEL macropluse of a duration of some microseconds, reached 260 μJ at a wavelength around 65 μm or a frequency around 4.6 THz, which is an order of magnitude higher than micropulse energies obtained in other FELs in this wavelength or frequency range. Experiments have begun using high-intensity narrow-band terahertz radiation from the FEL. This paper summarized the progress of the FEL and its application experiments.
Keywords: Free Electron Laser (FEL), Electron, Linear Accelerator (Linac), Terahertz (THz), Far-Infrared
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Review of Research on Covid-19
DE JERSEY; J. Review of Research on Covid-19 JAS4QoL 2020, 6(1) 1 online at: https://as4qol.org/EvP4w
Categories: > Volume 6, > Wisdom Notes, Announcements, Journal Articles, Volumes
Tags: coronavirus, Coronavirus Epidemiology, Coronavirus Treatments, covid-19, Covid-19 Epidemiology, Covid-19 Treatments, DE JERSEY; John, Wisdom Note
Review of Research on Covid-19
The University of Queensland, St. Lucia, Queensland 4072, Australia (jandjdej@bigpond.net.au)
A number of approaches to alleviate the Covid-19 pandemic have been discussed as well as longer term solutions. It seems possible that, when the pandemic has run its course, Covid-19 will continue at a low level in the community and be controlled by a vaccine and selective drugs developed as a consequence of the pandemic. How rapidly the properties of the virus may change as a result of mutations remains to be seen. Changes may lead to weakening of vaccine efficacy, development of drug resistance and/or to a strengthening or weakening of the virus' infectivity. The Covid-19 pandemic has highlighted once again the possibility that future viruses may cross the animal human barrier with devastating consequences. Such events are rendered more likely by increases in world population and destruction of wild animal habitat.
Keywords: Covid-19, Coronavirus, Covid-19 Epidemiology, Covid-19 Treatments
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