Colloquium APC

NIKA and NIKA2: from the pathfinder KID camera to the ultimate mm-wave imaging/polarimetry at the 30-meters Pico Veleta telescope

After a quick introduction to the KID (Kinetic Inductance Detectors) basic principles, I will describe the development of the NIKA (Néel IRAM KID Arrays) instrument. NIKA, operating simultaneously at 150 and 250 GHz and covering a 2 arc-min field-of-view, has been the pathfinder for the KID technology during the period 2009 to 2014. In particular, it has been the first kinetic inductance camera ever on the sky (2009), and the first opened to the astronomers via competitive calls (2013).

The DAMIC experiment: searching for WIMPs and beyond with CCDs

The DAMIC experiment employs the bulk silicon of ~mm-thick charge-coupled devices (CCDs) for direct detection of dark matter particles. This novel technique features an unprecedentedly low threshold for nuclear and electron recoils (down to a single electron of charge), providing optimal sensitivity for low-mass dark matter particles (< 10 GeV). In addition, the spatial resolution of the CCDs, unique amongst dark matter detectors, results in powerful methods to identify and mitigate environmental and cosmogenic backgrounds.

Novel superconducting detectors for next-generation CMB and submm instruments

The kinetic inductance detector (KID) offers simple fabrication, intrinsic multiplexing of thousands of detectors per cable, much higher dynamic range than competing technologies, and near background-limited operation at mm and submm-wavelength frequencies.  I'll discuss two related applications. The first, SuperSpec, is an compact, mm-wavelength, on-chip spectrometer.

Baryon Acoustic Oscillations with Cosmic Voids

 

Baryon Acoustic Oscillations with galaxies, combined  with Cosmic Microwave Background data (in the framework of the Friedman-Lemaitre-Robertson-Walker solution to Einstein's General Relativity) provide today the most precise  determination of cosmological parameters.

The Universe is a big expanding Void in which  matter, dark and luminous has grown from initial density perturbations to the observed pattern in the sky. Galaxies as observed in redshift space, display a web-like structure, the Cosmic Web, with clusters, filaments, sheets and voids.

Next-Generation Gravitational-Wave Detectors

The detection of gravitational waves from the mergers of binary black holes by the Advanced LIGO detectors has provided a first glimpse on the most energetic phenomena in the Universe. We can now look ahead and conceive a new generation of detectors with higher sensitivity. Europe has taken first steps years ago with the design study of the Einstein Telescope. The LIGO community in the US is discussing a similar project currently under the name Cosmic Explorer.

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