Bruno Maffei
Experimental Cosmologist and Astrophysicist

Professor of Physics and Astrophysics
at Institut d'Astrophysique Spatiale and Université Paris-Saclay

About Me

I have worked in the field of Radio to Sub-millimetre wave astronomical instrumentation since 1990, when I started my PhD at the IAS-Orsay, France. After a short stay at CalTech and IPAC in Pasadena, I have then worked for 21 years in the UK (QMUL, Cardiff University and The University of Manchester / Jodrell Bank Centre for Astrophysics), contributing to the development of several astronomical instruments.
Since 2016, I am working on several R&D programmes on cryogenics, optics and detector testing, leading an instrumentation group within the Cosmology team at the IAS to support developments for CMB and far-infrared Astronomy. 


In parallel to Research and Development programmes, I am contributing to several astronomical instruments, mostly dedicated to the study of the Cosmic Microwave Background, either operated from the ground, or from balloon and space platforms. I have notably played a major role for the High Frequency Instrument (HFI) on the Planck space mission, for which I have coordinated the optics group and designed / developed many of the HFI focal plane cold optics components.

Present projects

PILOT Balloon borne instrument


Athena X-IFU

(X-ray Integral Field Unit)



(Balloon Interferometer for Spectral Observations of the primordial Universe)


( Baryon acoustic oscillations in Integrated Neutral Gas Observations)

Telescope and horn design


(Q&U Bolometric Interferometer for Cosmology)
Optics and Horn design

Past projects


(Q-U-I JOint TEnerife)

Telescope and Horn design


Bolometric camera for the APEX telescope


Design, develoment and tests of HFI focal plane; Coordinator of HFI optics group


(Five hundred metre Aperture Spherical Telescope)
Optics and L-Band receiver

Archeops balloon borne CMB project

Focal plane development


A list of publications can be found on the NASA-ADS site


I have been teaching in French and in English, from 1st year undergraduate to postgraduate levels, at several universities in the UK and now in France.

Present teaching at Université Paris-Saclay

Master (M1 P&A) Traitement du Signal
Signal processing
Master ( M1 General Physics)
Astrophysics and Astroparticles
L2 (Double licence Math-Physique)
2nd year undergraduate
Méthodes Numériques Python
Numerical Methods in Python
Master (M2 AAIS)
Post-graduate Master by research
Méthodologie analyse de données (projet)


Institut d'Astrophysique Spatiale
Bat 121, Université Paris-Saclay
91405 Orsay Cedex
Phone Number:
+33 (0)1 69 85 85 67
Email address: