Highly sensitive detectors for the B-BOP instrument

25 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

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

Speaker

Dr Obaid-Allah ADAMI (CEA SACLAY)

Description

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.

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

Primary author

Dr Obaid-Allah ADAMI (CEA SACLAY)

Co-authors

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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