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We present the first detection of the thermal Sunyaev-Zel'dovich (tSZ) effectfrom a cluster of galaxies performed with a KIDs (Kinetic Inductance Detectors)based instrument. The tSZ effect is a distortion of the black body CMB (CosmicMicrowave Background) spectrum produced by the inverse Compton interaction ofCMB photons with the hot electrons of the ionized intra-cluster medium. Themassive, intermediate redshift cluster RX J1347.5-1145 has been observed usingNIKA (New IRAM KIDs arrays), a dual-band (140 and 240 GHz) mm-wave imagingcamera, which exploits two arrays of hundreds of KIDs: the resonant frequenciesof the superconducting resonators are shifted by mm-wave photons absorption.This tSZ cluster observation demonstrates the potential of the next generationNIKA2 instrument, being developed for the 30m telescope of IRAM, at Pico Veleta(Spain). NIKA2 will have 1000 detectors at 140GHz and 2x2000 detectors at240GHz, providing in that band also a measurement of the linear polarization.NIKA2 will be commissioned in 2015.

Detection of the tSZ effect with the NIKA camera