S. S. Meyer

TL;DR: The first-generation Holometer as mentioned in this paper is the first instrument capable of measuring correlated variations in space-time position at strain noise power spectral densities smaller than a Planck time.

TL;DR: In this paper, the authors present the pre-deployment performance of the fMux readout system with the SPT-3G focal plane, showing that the system can achieve exceptional sensitivity through a focal plane of ~16,000 transition-edge sensor bolometers, an order of magnitude more than the current SPTpol receiver.

Abstract: The third flight of the Medium-Scale Anisotropy Measurement (MSAM1), in 1995 June, observed a new strip of sky, doubling the sky coverage of the original MSAM1 data set. MSAM1 observes with a 05 beam size in four bands from 5 to 20 cm-1. From these four bands we derive measurements of cosmic microwave background radiation (CMBR) anisotropy and interstellar dust emission. Our measurement of dust emission correlates well with the 100 μm IRAS Sky Survey Atlas; from this comparison we determine an effective emissivity spectral index between 100 μm and 444 μm of 1.46±0.28. Analysis of our measurement of CMBR anisotropy shows that for Gaussian-shaped correlation functions with θc = 03, we place a limit on total rms anisotropy of 2.2×10−5<ΔT/T<3.9×10−5 (90% confidence interval, including calibration error). The band-power limits are δT ≡ l(l+1)Cl/2π½=50+16−11 μK at l=160, and δT=65+18−13 μK at l=270 (1 σ limits, including calibration error). The corresponding limits with statistical errors only are δT=50+ 13−9 μK and δT=65+ 14−10 μK, respectively. These measurements are consistent with a standard adiabatic cold dark matter model; we discuss constraints on h, n, and the redshift of reionization.

TL;DR: In this paper, the authors present the design, manufacturing methods, and characterization of 20 microwave feed horns currently in use on the Microwave Anisotropy Probe (MAP) satellite.

TL;DR: In this paper, the authors present the details of the design, commissioning, deployment, on-sky optical characterization and detector performance of the complete SPTpol focal plane, which is one of the first deployed instruments using DfMUX readout technology.