The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

MacDermid, Kevin; Aboobaker, Asad M.; Ade, Peter A. R.; Aubin, F.; Baccigalupi, C.; Bandura, Kevin; Bao, Chaoyun; Borrill, J.; Chapman, David; Didier, Joy; Dobbs, M.; Grain, Julien; Grainger, W.; Hanany, Shaul; Helson, Kyle; Hillbrand, Seth; Hilton, G. C.; Hubmayr, Hannes; Irwin, K. D.; Johnson, Bradley R.; Jaffe, A. H.; Jones, T. J.; Kisner, T. S.; Klein, Jeff; Korotkov, Andrei; Lee, Adrian V.; Levinson, L. J.; Limon, M.; Miller, Amber; Milligan, Michael; Pascale, Enzo; Raach, Kate; Reichborn-Kjennerud, Britt; Reintsema, C. D.; Sagiv, Ilan; Smecher, G.; Stompor, R.; Tristram, M.; Tucker, G. S.; Westbrook, Ben; Zilic, Kyle

doi:10.1117/12.2056267

Cited by 14 publications

(19 citation statements)

References 11 publications

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“…An all-sky cosmic variance-limited measurement to much smaller scales is feasible with current technology and several experimental designs have been proposed [330,332,333]. Although none of the former have been selected for funding to date, ground based and sub-orbital CMB polarisation measurements (which either by themselves [334] or taken in combination [335][336][337][338][339][340][341][342][343][344][345][346][347][348], promise almost full sky coverage) remain one of the most promising future avenues for the detection of features, especially on the largest scales.…”

Section: Cmb Polarisation Anisotropiesmentioning

confidence: 99%

Features and new physical scales in primordial observables: Theory and observation

Chluba

Hamann

Patil

2015

Int. J. Mod. Phys. D

212

233

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June 22, 20152 All cosmological observations to date are consistent with adiabatic, Gaussian and nearly scale invariant initial conditions. These findings provide strong evidence for a particular symmetry breaking pattern in the very early universe (with a close to vanishing order parameter, ), widely accepted as conforming to the predictions of the simplest realizations of the inflationary paradigm. However, given that our observations are only privy to perturbations, in inferring something about the background that gave rise to them, it should be clear that many different underlying constructions project onto the same set of cosmological observables. Features in the primordial correlation functions, if present, would offer a unique and discriminating window onto the parent theory in which the mechanism that generated the initial conditions is embedded. In certain contexts, simple linear response theory allows us to infer new characteristic scales from the presence of features that can break the aforementioned degeneracies among different background models, and in some cases can even offer a limited spectroscopy of the heavier degrees of freedom that couple to the inflaton. In this review, we offer a pedagogical survey of the diverse, theoretically well grounded mechanisms which can imprint features into primordial correlation functions in addition to reviewing the techniques one can employ to probe observations. These observations include cosmic microwave background anisotropies and spectral distortions as well as the matter two and three point functions as inferred from large-scale structure and potentially, 21 cm surveys.

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Section: Cmb Polarisation Anisotropiesmentioning

confidence: 99%

Features and new physical scales in primordial observables: Theory and observation

Chluba

Hamann

Patil

2015

Int. J. Mod. Phys. D

212

233

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“…Although subsequent work has shown this signal to be attributable to polarized dust emission [12,13], inclusion of the BICEP2 data gives the strongest upper bound on the tensor-to-scalar ratio [14], so we have crossed the critical threshold at which the tensor power spectrum is more accurately constrained by polarization data than by temperature data. No one knows if the tensor signal is large enough to be resolved with current technology but many increasingly sensitive polarization experiments are planned, under way or actually analysing data, including POLARBEAR2 [15], PIPER [16], SPIDER [17], BICEP3 [18], and EBEX [19].…”

Section: Introductionmentioning

confidence: 99%

Precision predictions for the primordial power spectra of scalar potential models of inflation

2016

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We exploit a new numerical technique for evaluating the tree order contributions to the primordial scalar and tensor power spectra for scalar potential models of inflation. Among other things we use the formalism to develop a good analytic approximation which goes beyond generalized slow roll expansions in that (1) it is not contaminated by the physically irrelevant phase, (2) its 0th order term is exact for constant first slow roll parameter, and (3) the correction is multiplicative rather than additive. These features allow our formalism to capture at first order, effects which are higher order in other expansions. Although this accuracy is not necessary to compare current data with any specific model, our method has a number of applications owing to the simpler representation it provides for the connection between the power spectra and the expansion history of a general model.

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“…The EBEX 2013 flight marks the first balloon-borne operation of a monolithic array of kilopixel TES bolometers, the first implementation of a frequency multiplexing factor of 16 on any telescope, the first implementation of a 4 K continuously rotating AHWP, and the first use of a 4 K superconducting magnetic bearing for astrophysical applications. 7…”

Section: The Ebex 2013 Flightmentioning

confidence: 99%

Temperature calibration of the E and B Experiment

Aubin

Aboobaker

Bao

et al. 2017

The Fourteenth Marcel Grossmann Meeting

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The E and B Experiment (EBEX) is a balloon-borne polarimeter designed to measure the polarization of the cosmic microwave background radiation and to characterize the polarization of galactic dust. EBEX was launched December 29, 2012 and circumnavigated Antarctica observing ∼6,000 square degrees of sky during 11 days at three frequency bands centered around 150, 250 and 410 GHz. EBEX was the first experiment to operate a kilo-pixel array of transition-edge sensor bolometers and a continuously rotating achromatic half-wave plate aboard a balloon platform. It also pioneered the use of detector readout based on digital frequency domain multiplexing.We describe the temperature calibration of the experiment. The gain response of the experiment is calibrated using a two-step iterative process. We use signals measured on passes across the Galactic plane to convert from readout-system counts to power. The effective smoothing scale of the EBEX optics and the star camera-to-detector offset angles are determined through χ 2 minimization using the compact HII region RCW 38. This two-step process is initially performed with parameters measured before the EBEX 2013 flight and then repeated until the calibration factor and parameters converge.

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The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

Cited by 14 publications

References 11 publications

Features and new physical scales in primordial observables: Theory and observation

Features and new physical scales in primordial observables: Theory and observation

Precision predictions for the primordial power spectra of scalar potential models of inflation

Temperature calibration of the E and B Experiment

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