Optics of the HFI focal plane unit. The back-to-back horn (front and back horns) is coupling the incoming radiation from the telescope to a detector horn which is then coupling the radiation to the bolometer. The filters determining the spectral bands are …

The HFI covers six bands centered at 100, 143, 217, 353, 545 and 857 GHz, thanks to a thermo-optical design consisting of three corrugated horns and a set of compact reflective filters and lenses at cryogenic temperatures.

2024年1月25日 · The electronic band structure and valley splitting of monolayer H-HfI 2 and H-HfI 2 /T-VBrCl heterostructure have been investigated by first principles calculations. The monolayer H-HfI 2 exhibits valleytronic feature at K and K’ points of the valence bands.

2013年3月20日 · The spectral response of the HFI is used in Planck data analysis and component separation, this includes extraction of CO emission observed within Planck bands, dust emission, Sunyaev-Zeldovich sources, and intensity to polarization leakage.

Both lower and upper frequency thresholds, ν l, and ν u, are defined for each band, below and above which the integrated HFI FTS spectra and/or the composite filter spectra must be used, respectively. This is done to avoid introducing any detector nonlinearity residuals into the final spectral transmission data products.

2024年1月25日 · The electronic band structure and valley splitting of monolayer H-HfI 2 and H-HfI 2/T-VBrCl heterostructure have been investigated by first principles calculations. The monolayer H-HfI2 exhibits valleytronic feature at K and K’ points of the valence bands.

The spectral response of the HFI is used in Planck data analysis and component separation, this includes extraction of CO emission observed within Planck bands, dust emission, Sunyaev-Zeldovich sources, and intensity to polarization leakage.

In addition to processing data from individual detectors, HFI data are processed to provide band-average frequency maps, and sub-band average frequency maps. The sub-band frequency maps are comprised of three sets, DetSet1, DetSet2, and SWBs (i.e., spider-web bolometers only).

The seven additional data sets available here consist of 1) those used to derive cosmological parameters from the CMB power spectrum, 2) all-sky masks used for component separation and CMB power spectrum estimates, 3) instrumentation information for the LFI and HFI detectors, 4) validation data for Planck SZ cluster catalog, 5) all-sky ...

2013年3月20日 · The Planck High Frequency Instrument (HFI) spectral response was determined through a series of ground based tests conducted with the HFI focal plane in a cryogenic...