280 GHz Focal Plane Unit Design and Characterization for the Spider-2 Suborbital Polarimeter
Abstract
We describe the construction and characterization of the 280 GHz bolometric focal plane units (FPUs) to be deployed on the second flight of the balloon-borne Spider instrument. These FPUs are vital to Spider’s primary science goal of detecting or placing an upper limit on the amplitude of the primordial gravitational wave signature in the cosmic microwave background (CMB) by constraining the B-mode contamination in the CMB from Galactic dust emission. Each 280 GHz focal plane contains a $$16 \times 16$$ grid of corrugated silicon feedhorns coupled to an array of aluminum–manganese transition-edge sensor (TES) bolometers fabricated on 150 mm diameter substrates. In total, the three 280 GHz FPUs contain 1530 polarization-sensitive bolometers (765 spatial pixels) optimized for the low loading environment in flight and read out by time-division SQUID multiplexing. In this paper, we describe the mechanical, thermal, and magnetic shielding architecture of the focal planes and present cryogenic measurements which characterize yield and the uniformity of several bolometer parameters. The assembled FPUs have high yields, with one array as high as 95% including defects from wiring and readout. We demonstrate high uniformity in device parameters, finding the median saturation power for each TES array to be $$\sim $$ 3 pW at 300 mK withmore »
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- SPIDER
- OSTI Identifier:
- 1764045
- Report Number(s):
- FERMILAB-CONF-17-692-AE
oai:inspirehep.net:1705369
- DOE Contract Number:
- AC02-07CH11359
- Resource Type:
- Conference
- Journal Name:
- J.Low Temp.Phys.
- Additional Journal Information:
- Journal Volume: 193; Journal Issue: 5-6
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
Bergman, A. S., and et al. 280 GHz Focal Plane Unit Design and Characterization for the Spider-2 Suborbital Polarimeter. United States: N. p., 2018.
Web. doi:10.1007/s10909-018-2065-2.
Bergman, A. S., & et al. 280 GHz Focal Plane Unit Design and Characterization for the Spider-2 Suborbital Polarimeter. United States. https://doi.org/10.1007/s10909-018-2065-2
Bergman, A. S., and et al. 2018.
"280 GHz Focal Plane Unit Design and Characterization for the Spider-2 Suborbital Polarimeter". United States. https://doi.org/10.1007/s10909-018-2065-2. https://www.osti.gov/servlets/purl/1764045.
@article{osti_1764045,
title = {280 GHz Focal Plane Unit Design and Characterization for the Spider-2 Suborbital Polarimeter},
author = {Bergman, A. S. and et al.},
abstractNote = {We describe the construction and characterization of the 280 GHz bolometric focal plane units (FPUs) to be deployed on the second flight of the balloon-borne Spider instrument. These FPUs are vital to Spider’s primary science goal of detecting or placing an upper limit on the amplitude of the primordial gravitational wave signature in the cosmic microwave background (CMB) by constraining the B-mode contamination in the CMB from Galactic dust emission. Each 280 GHz focal plane contains a $16 \times 16$ grid of corrugated silicon feedhorns coupled to an array of aluminum–manganese transition-edge sensor (TES) bolometers fabricated on 150 mm diameter substrates. In total, the three 280 GHz FPUs contain 1530 polarization-sensitive bolometers (765 spatial pixels) optimized for the low loading environment in flight and read out by time-division SQUID multiplexing. In this paper, we describe the mechanical, thermal, and magnetic shielding architecture of the focal planes and present cryogenic measurements which characterize yield and the uniformity of several bolometer parameters. The assembled FPUs have high yields, with one array as high as 95% including defects from wiring and readout. We demonstrate high uniformity in device parameters, finding the median saturation power for each TES array to be $\sim $ 3 pW at 300 mK with a less than 6% variation across each array at $1\sigma $ . These focal planes will be deployed alongside the 95 and 150 GHz telescopes in the Spider-2 instrument, slated to fly from McMurdo Station in Antarctica in December 2018.},
doi = {10.1007/s10909-018-2065-2},
url = {https://www.osti.gov/biblio/1764045},
journal = {J.Low Temp.Phys.},
number = 5-6,
volume = 193,
place = {United States},
year = {Wed Sep 12 00:00:00 EDT 2018},
month = {Wed Sep 12 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
SPIDER: CMB polarimetry from the edge of space
text, January 2017
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- arXiv
SPIDER: CMB Polarimetry from the Edge of Space
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