Search results for " WFI"

showing 4 items of 4 documents

The filter and calibration wheel for the ATHENA wide field imager

2016

The planned filter and calibration wheel for the Wide Field Imager (WFI) instrument on Athena is presented. With four selectable positions it provides the necessary functions, in particular an UV/VIS blocking filter for the WFI detectors and a calibration source. Challenges for the filter wheel design are the large volume and mass of the subsystem, the implementation of a robust mechanism and the protection of the ultra-thin filter with an area of 160 mm square. This paper describes performed trade-offs based on simulation results and describes the baseline design in detail. Reliable solutions are envisaged for the conceptual design of the filter and calibration wheel. Four different varian…

010302 applied physicsComputer scienceDetectorFilter wheel mechanism FEM structural and acoustic analysis ATHENA WFIVolume (computing)Blocking (statistics)01 natural sciencesSquare (algebra)Settore FIS/05 - Astronomia E AstrofisicaPosition (vector)Filter (video)0103 physical sciencesElectronic engineeringCalibration010303 astronomy & astrophysicsSimulation
researchProduct

Zvaigžņotā Debess: 2000, Pavasaris (167)

2000

Contents: P.Müürsepp. B.Schmidt, Prominent Optician of 20th Century ; J.Miezis. Buildings on the Moon ; Z.Alksne, A.Alksnis. Stars Enshrouded in Envelopes ; A.Alksnis. Goals and Progress of the DENIS Program ; Z.Alksne. Shapley Supercluster – Playground of Clusters of Galaxies ; A.Alksnis. Wide Field Imager Discovers Distant Galaxies ; J.Jaunbergs. Roton SSTO: First Flight Tests ; M.Gills. Space Research 40 Years Ago – Chronicle ; I.Vilks. The Secret of Low-Probability Complexity in the Universe ; K.Bērziņš. On Friendly Terms with Cosmology: Development of Cosmological Views (concluded) ; A.Balklavs. Astronomy in the Internet (WWW) ; V.Flerov, A.Cēbers. Latvia 23rd Open Olympiad of Physics:…

Kosmoloģijas rašanās„Sirds” uz MarsaKants un debesu teorijaKonkursa „Lasa un vērtē” balvaKrustvārdu mīklaParanalas observatorijas teleskopi ANTU KUEYEN MELIPAL YEPUNKalendārs un LieldienasOptiķis Bernhards ŠmidtsDENIS programmaE.-I. Siliņa grāmata „Lielo patiesību meklējumi”„Domu riekstu” atbildesLiela lauka attēlotājs WFI – galaktiku kopa ACO3627Cilvēka esības jēgaAstronomijas skolotāju asociācijaLodveida kopas pundurgalaktikās NGC 5253 un Henize 2-10Šķietamās izmaiņas uz MēnessRaķete Rotary RocketSaules tēmas pētījumi LatvijāMinikomētas – hipotēzeDievs kristietībā un latvju daināsLatvijas atklātā fizikas olimpiādeBaldones meteorītsLielas bāzes interferometrijas VLBI novērojumi LatvijāCilvēka augums Saules ritmāKosmosa izpēte - pirms 40 gadiem“Aldaris” – “Zvaigžņotās Debess” sponsorsBolīds IrbenēŠeplija superkopaMarsa konkurss lasītājiemMarsa senie okeāniAstronomija - tīmeklīAstronomiskās parādības - 2000Zvaigžņu apvalkiLatvijas informātikas olimpiādeStarptautiskās ķīmijas olimpiādes laureāts Linards Kalvāns – intervijaMeteors virs Kanādas
researchProduct

The IXO Wide-Field Imager

2010

The Wide Field Imager (WFI) of the International X-ray Observatory (IXO) is an X-ray imaging spectrometer based on a large monolithic DePFET (Depleted P-channel Field Effect Transistor) Active Pixel Sensor. Filling an area of 10 × 10 cm² with a format of 1024 × 1024 pixels it will cover a field of view of 18 arcmin. The pixel size of 100 × 100 μm² corresponds to a fivefold oversampling of the telescope's expected 5 arcsec point spread function. The WFI's basic DePFET structure combines the functionalities of sensor and integrated amplifier with nearly Fano-limited energy resolution and high efficiency from 100 eV to 15 keV. The development of dedicated control and amplifier ASICs allows for…

X-ray AstronomyImaging spectrometerWide Field ImagerField of viewSettore ING-INF/01 - ElettronicaIntegrated amplifierlaw.inventionTelescopeOpticslawWFIDePFETX-ray SpectroscopyInternational X-ray Observatory; IXO; Wide Field Imager; WFI; X-ray Astronomy; X-ray Spectroscopy; X-ray Imaging; DePFET; Active Pixel SensorPhysicsCMOS sensorActive Pixel SensorPixelSpectrometersezelebusiness.industryAmplifierIXObusinessInternational X-ray ObservatoryX-ray Imaging
researchProduct

The wide-field imager for IXO: status and future activities

2010

The Wide Field Imager (WFI) of the International X-ray Observatory (IXO) is an X-ray imaging spectrometer based on a large monolithic DePFET (Depleted P-channel Field Effect Transistor) Active Pixel Sensor. Filling an area of 10 x 10 cm2 with a format of 1024 x 1024 pixels it will cover a field of view of 18 arcmin. The pixel size of 100 x 100 μm2 corresponds to a fivefold oversampling of the telescope's expected 5 arcsec point spread function. The WFI's basic DePFET structure combines the functionalities of sensor and integrated amplifier with nearly Fano-limited energy resolution and high efficiency from 100 eV to 15 keV. The development of dedicated control and amplifier ASICs allows for…

X-ray AstronomyImaging spectrometerWide Field ImagerField of viewSettore ING-INF/01 - ElettronicaIntegrated amplifierlaw.inventionTelescopeOpticslawWFIDePFETX-ray SpectroscopyInternational X-ray Observatory; IXO; Wide Field Imager; WFI; X-ray Astronomy; X-ray Spectroscopy; X-ray Imaging; DePFET; Active Pixel SensorPhysicsCMOS sensorActive Pixel SensorsezelePixelSpectrometerbusiness.industryAmplifierIXOInternational X-ray ObservatorybusinessX-ray ImagingSpace Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
researchProduct