5–6 Apr 2017
Sapienza Università di Roma e Sezione INFN di Roma
Europe/Rome timezone

Design and Electrical Performance of the Kinetic Inductance Detectors of the OLIMPO experiment

6 Apr 2017, 14:50
25m
Sala Lauree (Sapienza Università di Roma e Sezione INFN di Roma)

Sala Lauree

Sapienza Università di Roma e Sezione INFN di Roma

Speaker

Alessandro Paiella (Sapienza and ROMA1)

Description

In this contribution, we are going to show the design and the electrical performance of the horn-coupled lumped element kinetic inductance detectors (LEKIDs) for the OLIMPO experiment. OLIMPO is a balloon borne mission, devoted to the study of the largest structures in the Universe, by detecting the Sunyaev-Zel’Dovich effect of the Comsic Microwave Background (CMB) photons crossing clusters of galaxies. The multi-band focal planes (centered at 0.15, 0.20, 0.35 and 0.48 THz), large aperture telescope (2.6 m), photometric and spectrometer configuration (OLIMPO is equipped with a plug-in differential Fourier transform spectrometer) make OLIMPO able to characaterize all the components of the Sunyaev-Zel’dovich effect with unprecedented precision. The design of the LEKIDs has been optimized to cope with a wide range of optical loadings (corresponding to both photometric and spectrometric configurations). The electrical characterization of the LEKID arrays was performed in the OLIMPO cryostat, at a temperutare around 300 mK and under a constant optical load lower than 500 fW. The readout electronics is a customized ROACH-2 coupled to a MUSIC DAC/ADC board. The averaged reasponsivities for the arrays, measured from the phase readout, are 1.18×10^(11) rad/W for the 0.15 THz array, 4.10×10^(10) rad/W for the 0.20 THz array, 1.09×10^(12) rad/W for the 0.35 THz array, and 4.41×10^(11) rad/W for the 0.48 THz array. Therefore, measuring the spectral noise density for each pixels of the arrays, whose average values are 2.5×10^(−5) rad/sqrt(Hz) for the 0.15 THz array, 3.6×10^(−5) rad/sqrt(Hz) for the 0.20 THz array, 5.1×10^(−5) rad/sqrt(Hz) for the 0.35 THz array, and 1.9×10^(−9) rad/sqrt(Hz) for the 0.48 THz array, we obtained the values of the averaged electrical noise equivalent power (NEP) over all the arrays: 2×10^(−16) W/sqrt(Hz), 9×10^(−16) W/sqrt(Hz), 5×10^(−17) W/sqrt(Hz), and 4×10^(−17) W/sqrt(Hz) respectively for the four OLIMPO arrays.

Primary author

Alessandro Paiella (Sapienza and ROMA1)

Co-authors

Alessandro Coppolecchia (Sapienza and ROMA1) Elia Stefano Battistelli (Sapienza and ROMA1) Fabio Columbro (Dipartimento di Fisica, Sapienza) Francesco Piacentini (Sapienza and ROMA1) Giuseppe D'Alessandro (Dipartimento di Fisica - Sapienza) Ivan Colantoni (IFN-CNR) Luca Lamagna (Sapienza and ROMA1) Maria Gabriella Castellano (IFN-CNR) Paolo De Bernardis (Sapienza and ROMA1) Philip Mauskopf (Arizona State University) Samuel Gordon (Arizona State University) Silvia Masi (Sapienza and ROMA1)

Presentation materials

There are no materials yet.