scholarly journals Micro-Spec: an ultracompact, high-sensitivity spectrometer for far-infrared and submillimeter astronomy

2014 ◽  
Vol 53 (6) ◽  
pp. 1094 ◽  
Author(s):  
Giuseppe Cataldo ◽  
Wen-Ting Hsieh ◽  
Wei-Chung Huang ◽  
S. Harvey Moseley ◽  
Thomas R. Stevenson ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Far Infrared ◽  
Submillimeter Astronomy

scholarly journals Two bolometer arrays for far-infrared and submillimeter astronomy

2004 ◽  
Author(s):  
Robert F. Silverberg ◽  
Christine A. Allen ◽  
Sachidananda R. Babu ◽  
Dominic J. Benford ◽  
David T. Chuss ◽  
...  
Keyword(s):  
Far Infrared ◽  
Submillimeter Astronomy ◽  
Bolometer Arrays

Performance of high-sensitivity quantum Hall far infrared photodetectors

2002 ◽  
Vol 80 (1) ◽  
pp. 136-138 ◽  
Author(s):  
Y. Kawaguchi ◽  
K. Hirakawa ◽  
M. Saeki ◽  
K. Yamanaka ◽  
S. Komiyama
Keyword(s):  
Quantum Hall ◽  
High Sensitivity ◽  
Far Infrared ◽  
Infrared Photodetectors

A new high sensitivity far-infrared laser interferometer for the HL-2A tokamak

2017 ◽  
Vol 88 (8) ◽  
pp. 083508 ◽  
Author(s):  
Y. G. Li ◽  
Y. Zhou ◽  
Y. Li ◽  
Z. C. Deng ◽  
H. X. Wang ◽  
...  
Keyword(s):  
Laser Interferometer ◽  
High Sensitivity ◽  
Far Infrared ◽  
Infrared Laser ◽  
Far Infrared Laser

High sensitivity far infrared laser diagnostics for the C-2U advanced beam-driven field-reversed configuration plasmas

2016 ◽  
Vol 87 (11) ◽  
pp. 11E125 ◽  
Author(s):  
B. H. Deng ◽  
M. Beall ◽  
J. Schroeder ◽  
G. Settles ◽  
P. Feng ◽  
...  
Keyword(s):  
Laser Diagnostics ◽  
High Sensitivity ◽  
Far Infrared ◽  
Infrared Laser ◽  
Field Reversed Configuration ◽  
Far Infrared Laser

scholarly journals The C-Band All-Sky Survey (C-BASS): constraining diffuse Galactic radio emission in the North Celestial Pole region

2019 ◽  
Vol 485 (2) ◽  
pp. 2844-2860 ◽  
Author(s):  
C Dickinson ◽  
A Barr ◽  
H C Chiang ◽  
C Copley ◽  
R D P Grumitt ◽  
...  
Keyword(s):  
Dust Emission ◽  
High Sensitivity ◽  
Far Infrared ◽  
Microwave Emission ◽  
Correlation Technique ◽  
The North ◽  
Sky Survey ◽  
Celestial Pole ◽  
Source Confusion ◽  
5 Ghz

ABSTRACT The C-Band All-Sky Survey (C-BASS) is a high sensitivity all-sky radio survey at an angular resolution of 45 arcmin and a frequency of 4.7 GHz. We present a total intensity map of the North Celestial Pole (NCP) region of sky, above declination >+80°, which is limited by source confusion at a level of ≈0.6 mK rms. We apply the template-fitting (cross-correlation) technique to WMAP and Planck data, using the C-BASS map as the synchrotron template, to investigate the contribution of diffuse foreground emission at frequencies ∼20–40 GHz. We quantify the anomalous microwave emission (AME) that is correlated with far-infrared dust emission. The AME amplitude does not change significantly (${\lt }10\, {{\ \rm per\ cent}}$) when using the higher frequency C-BASS 4.7 GHz template instead of the traditional Haslam 408 MHz map as a tracer of synchrotron radiation. We measure template coefficients of 9.93 ± 0.35 and $9.52\pm 0.34\,$ K per unit τ353 when using the Haslam and C-BASS synchrotron templates, respectively. The AME contributes $55\pm 2\, \mu$K rms at 22.8 GHz and accounts for ${\approx } 60{{\ \rm per\ cent}}$ of the total foreground emission. Our results show that a harder (flatter spectrum) component of synchrotron emission is not dominant at frequencies ≳5 GHz; the best-fitting synchrotron temperature spectral index is β = −2.91 ± 0.04 from 4.7 to 22.8 GHz and β = −2.85 ± 0.14 from 22.8 to 44.1 GHz. Free–free emission is weak, contributing ${\approx } 7\, \mu$K rms (${\approx } 7{{\ \rm per\ cent}}$) at 22.8 GHz. The best explanation for the AME is still electric dipole emission from small spinning dust grains.

scholarly journals Measuring Stratospheric H2O with an Airborne Spectrometer

2014 ◽  
Vol 31 (7) ◽  
pp. 1502-1515 ◽  
Author(s):  
Maziar Bani Shahabadi ◽  
Yi Huang
Keyword(s):  
Water Vapor ◽  
Radiative Transfer ◽  
Spectral Resolution ◽  
High Sensitivity ◽  
Far Infrared ◽  
High Spectral Resolution ◽  
Radiative Transfer Model ◽  
Small Scale ◽  
Transfer Model ◽  
Infrared Spectral

Abstract This study examines the ability of an infrared spectral sensor flying at the tropopause level for retrieving stratospheric H2O. Synthetic downwelling radiance spectra simulated by the line-by-line radiative transfer model are used for this examination. The potential of high-sensitivity water vapor retrieval is demonstrated by an ideal sensor with low detector noise, high spectral resolution, and full infrared coverage. A suite of hypothetical sensors with varying specifications is then examined to determine the technological requirements for a satisfactory retrieval. This study finds that including far infrared in the sensor’s spectral coverage is essential for achieving accurate H2O retrieval with an accuracy of 0.4 ppmv (1-sigma). The uncertainties in other gas species such as CH4, N2O, O3, and CO2 do not significantly affect the H2O retrieval. Such a hyperspectral instrument may afford an advantageous tool, especially for detecting small-scale lower-stratospheric moistening events.

Sign in / Sign up

Export Citation Format

Share Document