Ultra-low noise TES bolometers for the US SAFARI contribution

26 Jul 2019, 14:30
15m
Auditorium G. Testori (Milano)

Auditorium G. Testori

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Oral Presentation Detector readout, signal processing, and related technologies Orals LM 002

Speaker

Dr Roger O'Brient (Jet Propulsion Laboratory)

Description

We are developing ultra-low noise transition edge sensors (TESs) for the SAFARI far-IR spectrograph, part of the cryogenically-cooled SPICA mission now in phase-A study in Europe. The sensitivity target for these devices is a per-pixel noise equivalent power (NEP) below 10^-19 WHz^-1/2. In order to fully characterize these devices, the testing environment requires sufficient suppression of both optical and RF power due to the low saturation power of the detector. Additionally a carefully designed magnetic shield is needed for the frequency domain multiplexing SQUID readout. In this talk we present our approach to a low-background measurement setup, and results in our testing program with the Ti/Au bilayer TES devices. We also briefly present our concept for a full SAFARI focal plane.

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

Primary authors

Dr Charles Bradford (Jet Propulsion Laboratory) Dr Hien Nguyen (Jet Propulsion Laboratory) Dr Howard Hui (California Institute of Technology) Mr Lorenzo Minutolo (Jet Propulsion Laboratory) Dr Marcus Runyan (Jet Propulsion Laboratory) Dr Matthew Kenyon (Jet Propulsion Laboratory) Dr Pierre Echternach (Jet Propulsion Laboratory) Dr Roger O'Brient (Jet Propulsion Laboratory)

Presentation Materials