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Your search keyword '"SHARP, E."' showing total 5 results
Start Over Author "SHARP, E." Journal review of scientific instruments
5 results on '"SHARP, E."'

1. Laboratory results from an ultra-stable MID IR spectrometer for exo-planet atmosphere characterization.

Author

Fixsen, D. J., Staguhn, J. G., Sharp, E., Maher, S., Mandell, A. M., and Brown, A.

Subjects
HABITABLE zone (Outer space), IR spectrometers, LIGHT bulbs, BOLOMETERS, THERMAL stability
Abstract

We have conducted a set of experiments on a TES (Transition-Edge Superconductor) bolometer detector array, demonstrating that a flux measurement stability better than 5 parts per million (ppm) over periods of hours to days, can be achieved with modest thermal stability requirements. This level of measurement stability is critical in enabling measurements of the atmospheric signatures of terrestrial-sized exoplanets around nearby K and M stars, including those in the star's habitable zone. The demonstration uses a simple tungsten filament light bulb as the source, a photo diode operating at 0.5 μm as a stability monitor for the light bulb, and a grating spectrometer in the 5–15 μm wavelength range. [ABSTRACT FROM AUTHOR] more...

Published
2025
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3. Sub-Kelvin Cooling for Two Kilopixel Bolometer Arrays in the PIPER Receiver

Author

Switzer, E. R, Ade, P. A. R, Baildon, T, Benford, D, Bennett, C. L, Chuss, D. T, Datta, R, Eimer, J. R, Fixsen, D. J, Gandilo, N. N, Essinger-Hileman, T. M, Halpern, M, Hilton, G, Irwin, K, Jhabvala, C, Kimball, M, Kogut, A, Lazear, J, Lowe, L. N, McMahon, J. J, Miller, T. M, Mirel, P, Moseley, S. H, Pawlyk, S, Rodriguez, S, Sharp, E, Shirron, P, Staguhn, J. G, Sullivan, D. F, Taraschi, P, Tucker, C. E, Walts, A, and Wollack, E. J more...

Subjects
Instrumentation And Photography, Engineering (General)
Abstract

The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne telescope mission to search for inflationary gravitational waves from the early universe. PIPER employs two 32 × 40 arrays of superconducting transition-edge sensors, which operate at 100 mK. An open bucket Dewar of liquid helium maintains the receiver and telescope optics at 1.7 K. We describe the thermal design of the receiver and sub-Kelvin cooling with a continuous adiabatic demagnetization refrigerator (CADR). The CADR operates between 70 and 130 mK and provides ≈10 μW cooling power at 100 mK, nearly five times the loading of the two detector assemblies. We describe electronics and software to robustly control the CADR, overall CADR performance in flightlike integrated receiver testing, and practical considerations for implementation in the balloon float environment. more...

Published
2019
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4. Lightweight long-hold-time Dewar

Author

Fixsen, D. J., primary, Cheng, E. S., additional, Crawford, T. M., additional, Meyer, S. S., additional, Wilson, G. W., additional, Oh, E. S., additional, and Sharp, E. H., additional

Published
2001
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