Back to Search
Start Over
Characterization and Performance of a Kilo-TES Sub-Array for ACTPol
- Source :
- Journal of Low Temperature Physics.
- Publication Year :
- 2014
- Publisher :
- Springer Science and Business Media LLC, 2014.
-
Abstract
- ACTPol is a polarization-sensitive receiver upgrade to the Atacama Cosmology Telescope (ACT) which will make millimeter wavelength measurements of the small-scale polarization anisotropies of the cosmic microwave background to investigate the properties of inflation, dark energy, dark matter, and neutrinos in the early Universe. ACTPol will employ three arrays of transition edge sensor (TES) bolometer detectors. The detectors, with a target transition temperature of 150 mK, will be operated at a bath temperature of 100 mK provided by a dilution refrigerator. One array operating at a central frequency of 150 GHz and consisting of 1024 TESes achieved first light at the ACT site in July 2013. We anticipate fielding the remainder of the focal plane, consisting of a second 150 GHz array and a multi-chroic array sensitive to 90 and 150 GHz, at the end of the 2013 observing season. In these proceedings, we present characterization of key detector parameters from measurements performed on the first array both in the lab and during initial field testing. We comment on the design goals, measurements, and uniformity of the detector transition temperatures, saturation powers, and thermal conductivities while detailing measurement methods and results for the detector optical efficiencies and time constants.
- Subjects :
- Physics
Physics::Instrumentation and Detectors
business.industry
Cosmic microwave background
Bolometer
Detector
Astrophysics::Instrumentation and Methods for Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
First light
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
law.invention
Optics
law
Atacama Cosmology Telescope
General Materials Science
Millimeter
Dilution refrigerator
Transition edge sensor
business
Subjects
Details
- ISSN :
- 15737357 and 00222291
- Database :
- OpenAIRE
- Journal :
- Journal of Low Temperature Physics
- Accession number :
- edsair.doi...........0e5c952b74b35a94266c1dce3afa87a1