Terahertz photometer to observe Solar flares in continuum

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dc.contributor.authorMarcon R.
dc.contributor.authorKaufmann P.
dc.contributor.authorFernandes L.O.T.
dc.contributor.authorGodoy R.
dc.contributor.authorMarun A.
dc.contributor.authorBortolucci E.C.
dc.contributor.authorZakia M.B.
dc.contributor.authorDiniz J.A.
dc.contributor.authorKudaka A.S.
dc.date.accessioned2024-03-13T01:08:25Z
dc.date.available2024-03-13T01:08:25Z
dc.date.issued2012
dc.description.abstractSolar observations at sub-THz frequencies detected a new flare spectral component peaking in the THz range, simultaneously with the well known microwaves component, bringing challenging constraints for interpretation. Higher THz frequencies observations are needed to understand the nature of the mechanisms occurring in flares. A THz photometer system was developed to observe outside the terrestrial atmosphere on stratospheric balloons or satellites, or at exceptionally transparent ground stations. The telescope was designed to observe the whole solar disk detecting small relative changes in input temperature caused by flares at localized positions. A Golay cell detector is preceded by low-pass filters to suppress visible and near IR radiation, a band-pass filter, and a chopper. A prototype was assembled to demonstrate the new concept and the system performance. It can detect temperature variations smaller than 1 K for data sampled at a rate of 10/s, smoothed for intervals larger than 4 s. For a 76 mm aperture, this corresponds to small solar burst intensities at THz frequencies. A system with 3 and 7 THz photometers is being built for solar flare observations on board of stratospheric balloon missions. © Springer Science+Business Media, LLC 2011.
dc.description.firstpage192
dc.description.issuenumber2
dc.description.lastpage205
dc.description.volume33
dc.identifier.doi10.1007/s10762-011-9866-6
dc.identifier.issn1866-6892
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36828
dc.relation.ispartofJournal of Infrared, Millimeter, and Terahertz Waves
dc.rightsAcesso Restrito
dc.subject.otherlanguageSolar flares THz continuum
dc.subject.otherlanguageTHz photometry
dc.subject.otherlanguageTHz systems
dc.titleTerahertz photometer to observe Solar flares in continuum
dc.typeArtigo
local.scopus.citations9
local.scopus.eid2-s2.0-84859803059
local.scopus.subjectBand pass
local.scopus.subjectGolay cells
local.scopus.subjectGround stations
local.scopus.subjectLocalized positions
local.scopus.subjectSolar disk
local.scopus.subjectSolar flare
local.scopus.subjectSolar observations
local.scopus.subjectSpectral components
local.scopus.subjectStratospheric balloon
local.scopus.subjectTemperature variation
local.scopus.subjectTera Hertz
local.scopus.subjectTHz frequencies
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84859803059&origin=inward
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