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26 April 2024 |
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The Detector System for the Stratospheric Kinetic Inductance Polarimeter (SKIP) | | B. R. Johnson
; P. A. R. Ade
; D. Araujo
; K. J. Bradford
; D. Chapman
; J. Didier
; S. Doyle
; H. K. Eriksen
; D. Flanigan
; C. Groppi
; S. Hillbrand
; G. Jones
; M. Limon
; P. Mauskopf
; H. McCarrick
; A. Miller
; T. Mroczkowski
; B. Reichborn-Kjennerud
; B. Smiley
; J. Sobrin
; I. K. Wehus
; J. Zmuidzinas
; | | Date: |
1 Aug 2013 | | Abstract: | We discuss the detector system for the Stratospheric Kinetic Inductance
Polarimeter (SKIP). SKIP is a proposed balloon-borne experiment designed to
study the cosmic microwave background, the cosmic infrared background and
Galactic dust emission by observing 1133 square degrees of sky in the Northern
Hemisphere with launches from Kiruna, Sweden. The instrument contains 2317
single-polarization, horn-coupled, aluminum lumped-element kinetic inductance
detectors (LEKIDs). The LEKIDs will be maintained at 100 mK with an adiabatic
demagnetization refrigerator. The polarimeter operates in two configurations,
one sensitive to a spectral band centered on 150 GHz and the other sensitive to
260 and 350 GHz bands. The detector readout system is based on the ROACH-1
board, and the detectors will be biased below 300 MHz. The detector array is
fed by an F/2.4 crossed-Dragone telescope with a 500 mm aperture yielding a 15
arcmin FWHM beam at 150 GHz. To minimize detector loading and maximize
sensitivity, the entire optical system will be cooled to 1 K. Linearly
polarized sky signals will be modulated with a metal-mesh half-wave plate that
is mounted at the telescope aperture and rotated by a superconducting magnetic
bearing. The observation program consists of at least two, five-day flights,
and 150 GHz observations are planned to begin in 2017. | | Source: | arXiv, 1308.0235 | | Services: | Forum | Review | PDF | Favorites | |
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