Jul 22 – 26, 2019
Europe/Rome timezone

Highly sensitive detectors for the B-BOP instrument

Jul 25, 2019, 5:45 PM
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia


Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Low Temperature Detector Development and Physics Poster session




B-BOP is one of the three scientific instruments of SPICA which aims, among other scientific goals, to map the galactic filamentary structures and their associated magnetic fields.

Each pixel of B-BOP consists of two orthogonal arrays of dipole antennas supported by four suspended interlaced spirals based on Si :P, B. In order to have a deep understanding of the influence of the doping densities on the Si thermometer’s electrical behavior, we have experimentally investigated, over a wide range of temperatures and with different doping densities, several square Si:P, B samples. The obtained results showed nonlinear R(PJoule) behavior which can be described by the variable-range hopping model. In addition, numerical simulations based on the experimental results, have been carried out to study the thermoelectric behaviour of each pixel as a function of the bias current, Ibias, and the absorbed optical power, POpt. We demonstrated (i) a strong dependence of the detector response, S = dV/dP, with Ibias over a five order of optical power magnitude, (ii) a gain of more than two orders of magnitude in sensitivity over Herschel space observatory, and (iii) a thermal time constant around 70 ms.

Student (Ph.D., M.Sc. or B.Sc.) N
Less than 5 years of experience since completion of Ph.D Y

Primary author



Louis Rodriguez (Commissariat à L'Énergie Atomique et aux Énergies Alternatives) ABDELKADER ALIANE (CEA-LETI) Dr Albrecht POGLITSCH (Max-Planck-Institut für Extraterrestrische Physik) Dr VINCENT REVERET (CEA) Dr Jean-Luc SAUVAGEOT (CEA) Dr LAURENT DUSSOPT (CEA) Dr VALERIE GOUDON (CEA)

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