Paper 13102-179
Paper 13102-179
LiteBIRD MHFT W-band RF breadboard modeling and characterisation
On demand | Presented live 20 June 2024 
Abstract
As for any CMB instrument, the accurate knowledge of the beam shape is crucial in order to limit the signal contamination and to have a precise CMB power spectrum reconstruction from the data. The MHFT on the future JAXA-led LiteBIRD space mission, based on a refractive design, will have a wide frequency coverage ranging from 89 to 448 GHz. In order to validate the modeling tools and the level of accuracy achievable on the experimental RF characterisation prior to any complete prototype, a simpler breadboard has been developed for W-Band (75-110 GHz). We present here both the modeling and the RF characterisation results of this breadboard which consists of a dielectric lens that is fed by a corrugated horn. The measurements were performed in the Near-Field, the Far-Field being then obtained through a transformation.
Presenter
Institut d'Astrophysique Spatiale (France)
Bruno Maffei has been working in the field of Radio to sub-millimetre wave astronomical instrumentation since 1990, when he started his PhD at the Institut d’Astrophysique Spatiale, Orsay, France. After a short stay at Caltech and IPAC in the USA, he has then worked for 21 years in the UK (Queen Mary College - London, Cardiff University and The University of Manchester), contributing to the development of several astronomical instruments, notably to the ESA Planck-HFI & Herschel-SPIRE space missions.
Since 2016 he is leading an instrumentation team within the Cosmology group at IAS, Paris-Saclay university, working on several R&D programmes on cryogenics, optics and detector testing to support developments for CMB and far-infrared astronomy.
He is contributing to the new CMB space mission LiteBIRD led by the Japanese space agency JAXA. He is the P.I. of a new balloon-borne project, BISOU, pathfinder for CMB spectral distortion studies.
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