Temperature calibration of the E and B Experiment

Aubin, F.; Aboobaker, Asad M.; Bao, Chaoyun; Geach, Christopher; Hanany, Shaul; Jones, T. J.; Klein, Jeff; Milligan, Michael; Raach, Kate; Young, Karl; Zilic, Kyle; Helson, Kyle; Korotkov, Andrei; Marchenko, Valerie; Tucker, Gregory S.; Ade, Peter A. R.; Pascale, Enzo; Araujo, Derek; Chapman, David; Didier, Joy; Hillbrand, Seth; Johnson, Bradley R.; Limon, M.; Miller, Amber; Reichborn-Kjennerud, Britt; Feeney, Stephen; Jaffe, A. H.; Stompor, R.; Tristram, M.; Dobbs, Matt; MacDermid, Kevin; Smecher, G.; Borrill, J.; Kisner, T. S.; Hilton, G. C.; Hubmayr, Johannes; Reintsema, C. D.; Baccigalupi, C.; Puglisi, Giuseppe; Lee, Adrian V.; Westbrook, Ben; Levinson, L. J.; Sagiv, Ilan

doi:10.1142/9789813226609_0229

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…EBEX was a balloon-borne polarimeter flown aboard a zero-pressure balloon that was launched on December 29, 2012 from McMurdo, Antarctica (Didier et al, 2015;Aubin et al, 2016;The EBEX Collaboration, 2017). The payload was designed to control attitude and scan a 400 sq.…”

Section: Introductionmentioning

confidence: 99%

“…Unique opportunity to investigate the free torsional motion of a stratospheric payload was offered during the flight of the E and B Experiment (EBEX) experiment. EBEX was a balloon-borne polarimeter flown aboard a zero-pressure balloon that was launched on December 29, 2012 from Mc-Murdo, Antarctica (Didier et al, 2015;Aubin et al, 2016;The EBEX Collaboration, 2017). The payload was designed to control attitude and scan a 400 sq.…”

Section: Introductionmentioning

confidence: 99%

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Torsional balloon flight line oscillations: Comparison of modelling to flight data

Aubin

Bayman

Hanany

et al. 2017

Advances in Space Research

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During the EBEX2013 long duration flight the payload was free to rotate in azimuth. The observed azimuth motion consisted of a superposition of full rotations with a period of 10-30 minutes and oscillatory motion with an amplitude of tens of degrees, average period of 79 s, and period dispersion of 12 s. We interpret the full rotations as induced by slow rotations of the balloon and the shorter period oscillatory motion as due to torsional oscillations of the flight line. We derive the torsional stiffness of the flight line using the bifilar pendulum model and apply it to the flight line of the EBEX2013 payload. We find a torsional spring constant of 36 kg m 2 /s 2 corresponding to a period of 58 s. We conclude that the bifilar model, which accounts for the geometry of the flight line but neglects all material properties, predicts a stiffness and period that are 45% larger and 25% shorter than those observed. It is useful to have a simple, easy to use, coarse approximation for

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Torsional balloon flight line oscillations: Comparison of modelling to flight data

Aubin

Bayman

Hanany

et al. 2017

Advances in Space Research

Self Cite

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The EBEX Balloon-borne Experiment—Detectors and Readout

Abitbol¹,

Aboobaker²,

Araujo³

et al. 2018

ApJS

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EBEX was a long-duration balloon-borne experiment to measure the polarization of the cosmic microwave background. The experiment had three frequency bands centered at 150, 250, and 410GHz and was the first to use a kilopixel array of transition edge sensor bolometers aboard a balloon platform. We describe the design and characterization of the array and the readout system. From the lowest to highest frequency, the median measured detectors' average thermal conductances were 39, 53, and 63pW/K, the medians of transition temperatures were 0.45, 0.48, and 0.47K, and the medians of normal resistances were 1.9, 1.5, and 1.4Ω; we also give the measured distributions. With the exception of the thermal conductance at 150GHz, all measured values are within 30% of their design. We measure median low-loop-gain time constants τ 0 = 88, 46, and 57ms. Two measurements of bolometer absorption efficiency gave results consistent within 10% and showing high (∼0.9) efficiency at 150GHz and medium (∼0.35 and ∼0.25) efficiency at the two higher bands. We measure a median total optical power absorbed of 3.6, 5.3, and 5.0pW. EBEX pioneered the use of the digital version of the frequency domain multiplexing system. We multiplexed the bias and readout of 16 bolometers onto two wires. The median per-detector noise-equivalent temperatures are 400, 920, and 14,500 mK s cmb. We compare these values to our preflight predictions and to a previous balloon payload. We discuss the sources of excess noise and the path for a future payload to make full use of the balloon environment.

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Temperature calibration of the E and B Experiment

Cited by 2 publications

References 6 publications

Torsional balloon flight line oscillations: Comparison of modelling to flight data

Torsional balloon flight line oscillations: Comparison of modelling to flight data

The EBEX Balloon-borne Experiment—Detectors and Readout

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