Daniel Becker

University of Colorado Boulder

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G. C. Hilton

National Institute of Standards and Technology

Joel N. Ullom

National Institute of Standards and Technology

James A. Beall

National Institute of Standards and Technology

Johannes Hubmayr

National Institute of Standards and Technology

D. A. Bennett

National Institute of Standards and Technology

John A. B. Mates

National Institute of Standards and Technology

Michael D. Niemack

Cornell University

Leila R. Vale

National Institute of Standards and Technology

K. D. Irwin

Stanford University

Daniel S. Swetz

National Institute of Standards and Technology

Cooperative Institutions

National Institute of Standards and Technology

214

Princeton University

162

University of Chicago

142

Stanford University

130

Kavli Institute for Particle Astrophysics and Cosmology

124

California Institute of Technology

106

University of California, Berkeley

102

SLAC National Accelerator Laboratory

101

University of Colorado Boulder

Fermi National Accelerator Laboratory

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Optical Demonstration of THz, Dual-Polarization Sensitive Microwave Kinetic Inductance Detectors

Journal of Low Temperature Physics (2015)

Bradley Dober Jason Austermann James A. Beall Daniel Becker George Che

Polarimeter

Black-body radiation

10.1007/s10909-015-1434-3

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Citations (16)

The Atacama Cosmology Telescope: Summary of DR4 and DR5 Data Products and Data Access

The Astrophysical Journal Supplement Series (2021)

Maya Mallaby-Kay Zachary Atkins Simone Aiola Stefania Amodeo J. E. Austermann

Abstract Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access. These data include temperature and polarization maps that cover nearly half the sky at arcminute resolution in three frequency bands; lensing maps and component-separated maps covering ∼2100 deg 2 of sky; derived power spectra and cosmological likelihoods; a catalog of over 4000 galaxy clusters; and supporting ancillary products including beam functions and masks. The data and products are described in a suite of ACT papers; here we provide a summary. In order to facilitate ease of access to these data, we present a set of Jupyter IPython notebooks developed to introduce users to DR4, DR5, and the tools needed to analyze these data. The data products (excluding simulations) and the set of notebooks are publicly available on the NASA Legacy Archive for Microwave Background Data Analysis; simulation products are available on the National Energy Research Scientific Computing Center.

Data set

Data access

Pathfinder

10.3847/1538-4365/abfcc4

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Citations (2)

Policy learning and innovation in national energy efficiency plans

Ralf Schüle Christof Arens Daniel Becker Orsolya Fülöp

Source

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Citations (1)

Notes on factor price equality and biased technical change in a two-cone trade model

Thuenen-Series of Applied Economic Theory (2006)

Daniel Becker Erich Gundlach

We reconsider the effects of long-run economic growth on relative factor prices across cones of specialization. We model economic growth as exogenous technical change. Allowing for capital biased technical change with a sector bias and for endogenous commodity prices, we find that economic growth may increase or decrease factor price differences across cones. For a neutral demand side and capital biased growth in the most capital intensive sector, we find that economic growth encourages less factor price diversity across cones.

Factor price

Technical change

Capital (architecture)

Relative price

Endogenous growth theory

Cone (formal languages)

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Citations (0)

Research Guides: Poverty & Income Inequality: Tools

Daniel Becker

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Design of 280 GHz feedhorn-coupled TES arrays for the balloon-borne polarimeter SPIDER

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2016)

Johannes Hubmayr J. E. Austermann James A. Beall Daniel Becker Shannon M. Duff

Polarimeter

Source

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Horn Coupled Multichroic Polarimeters for the Atacama Cosmology Telescope Polarization Experiment

Journal of Low Temperature Physics (2014)

Rahul Datta Johannes Hubmayr Charles Munson J. E. Austermann James A. Beall

Polarimeter

Radio spectrum

10.1007/s10909-014-1134-4

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Citations (38)

Which Role for Market-Oriented Instruments for Achieving Energy Efficiency Targets in Germany?

Energy & Environment (2013)

Barbara Schlomann Clemens Rohde Wolfgang Eichhammer Veit Bürger Daniel Becker

In order to achieve national or EU-wide energy efficiency targets, a variety of policies is available. Apart from the traditional set of regulative, financial, fiscal and informative instruments, market-oriented instruments as e.g. energy efficiency obligations (EEOs) become more and more important. The new EU Energy Efficiency Directive (EED) even suggests EEOs as the preferred instrument for promoting energy efficiency in all Member States. Their actual impact, however, depends highly on the national framework. With a multi-criteria, semi-quantitative approach we evaluate the strengths and weaknesses of these instruments, taking Germany as an example. The evaluation shows that none of the instruments alone can achieve the prescribed energy efficiency targets, but that a mix of instruments is necessary. The possibility of a budget-independence of the funding in particular supports a supplementary deployment of new market-oriented instruments such as an EEO as part of the future mix of policy instruments in Germany.

Directive

Strengths and weaknesses

Financial instrument

Independence

10.1260/0958-305x.24.1-2.27

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Citations (5)

SPTpol: an instrument for CMB polarization measurements with the South Pole Telescope

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2012)

J. E. Austermann K. A. Aird James A. Beall Daniel Becker A. N. Bender

SPTpol is a dual-frequency polarization-sensitive camera that was deployed on the 10-meter South Pole Telescope in January 2012. SPTpol will measure the polarization anisotropy of the cosmic microwave background (CMB) on angular scales spanning an arcminute to several degrees. The polarization sensitivity of SPTpol will enable a detection of the CMB “B-mode” polarization from the detection of the gravitational lensing of the CMB by large scale structure, and a detection or improved upper limit on a primordial signal due to inationary gravity waves. The two measurements can be used to constrain the sum of the neutrino masses and the energy scale of ination. These science goals can be achieved through the polarization sensitivity of the SPTpol camera and careful control of systematics. The SPTpol camera consists of 768 pixels, each containing two transition-edge sensor (TES) bolometers coupled to orthogonal polarizations, and a total of 1536 bolometers. The pixels are sensitive to light in one of two frequency bands centered at 90 and 150 GHz, with 180 pixels at 90 GHz and 588 pixels at 150 GHz. The SPTpol design has several features designed to control polarization systematics, including: singlemoded feedhorns with low cross-polarization, bolometer pairs well-matched to dfference atmospheric signals, an improved ground shield design based on far-sidelobe measurements of the SPT, and a small beam to reduce temperature to polarization leakage. We present an overview of the SPTpol instrument design, project status, and science projections.

South Pole Telescope

Transition edge sensor

Cosmic background radiation

10.1117/12.927286

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Citations (114)

Standoff passive video imaging at 350 GHz with 251 superconducting detectors | NIST

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2014)

Daniel Becker James A. Beall Hsiao-Mei Cho G. C. Hilton Nicholas G. Paulter

NIST

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