High sensitivity, low noise Mirnov coil array on Prairie View rotamak

2012 ◽  
Vol 83 (10) ◽  
pp. 10E304 ◽  
Author(s):  
X. Yang ◽  
S. Houshmandyar ◽  
O. Dada ◽  
E. Reddic ◽  
T. S. Huang
Keyword(s):  
High Sensitivity ◽  
Low Noise ◽  
Coil Array

scholarly journals [Paper] A Low Noise and High Sensitivity Image Sensor with Imaging and Phase-Difference Detection AF in All Pixels

2016 ◽  
Vol 4 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Masahiro Kobayashi ◽  
Michiko Johnson ◽  
Yoichi Wada ◽  
Hiromasa Tsuboi ◽  
Hideaki Takada ◽  
...  
Keyword(s):  
Phase Difference ◽  
High Sensitivity ◽  
Image Sensor ◽  
Low Noise ◽  
Difference Detection

A high-sensitivity strain/inertial seismograph installation

1970 ◽  
Vol 60 (6) ◽  
pp. 1803-1822 ◽  
Author(s):  
James E. Fix ◽  
John R. Sherwin
Keyword(s):  
Environmental Control ◽  
Earth Tide ◽  
High Sensitivity ◽  
Low Noise ◽  
Photographic Film ◽  
Noise Levels ◽  
Directional Response ◽  
Long Period ◽  
Phase Velocities ◽  
Short Period

Abstract A seismograph complex consisting of short-period (SP), long-period (LP), and extended long-period (XLP) inertial and strain seismographs has been installed. Recordings are made on magnetic tape and photographic film. Routine magnifications on the 20-trace, 16-mm film recorders for all three components are: SP inertial, 500 K; LP inertial, 100 K. The noise levels permit equivalent magnifications on the strain seismographs. The complex provides seismic wave discrimination by directional response, which is independent of period, and by detection of differences in phase velocities between P, S, Love, or Rayleigh arrivals. The strain seismographs use 40-m-long rods and moving coil transducers with generator constants of 32,000 v/m/sec. They sense waves of 5 × 10-13 strain at 30 sec and reject the 2 × 10-8 earth-tide strain. A low-noise preamplifier drives a filter assembly which provides SP, LP, and XLP strain outputs. The complex is installed in an abandoned mine 50 km southeast of Phoenix, Arizona. Environmental control is provided by burial at a depth of about 110 m in a quartz diorite, by sealing the mine, and by insulating the seismometers.

scholarly journals Electronic Optical Sky Surveys

1998 ◽  
Vol 179 ◽  
pp. 49-55
Author(s):  
T.A. McKay
Keyword(s):  
Dynamic Range ◽  
Large Fraction ◽  
High Sensitivity ◽  
High Dynamic Range ◽  
Low Noise ◽  
Computer Hardware ◽  
Optical Detectors ◽  
Small Fields ◽  
Technical Advances ◽  
High Dynamic

The introduction of of Charge Coupled Devices (CCDs) in the middle 1970s provided astronomy with nearly perfect (linear, high-sensitivity, low-noise, high dynamic-range, digital) optical detectors. Unfortunately, restrictions imposed by CCD production and cost has typically limited their use to observations of relatively small fields. Recently a combination of technical advances have made practical the application of CCDs to survey science. CCD mosaic cameras, which help overcome the size restrictions imposed by CCD manufacture, allow electronic access to a larger fraction of the available focal plane. Multi-fiber spectrographs, which couple the low-noise, high QE performance of CCDs with the ability to observe spectra for many objects at once, have improved the spectroscopic efficiency of telescopes by factors approaching half a million. An improved understanding of image distortion gives us telescopes on which we expect sub-arcsecond images a large fraction of the time. Finally, and perhaps most important, the performance of computer hardware continues to advance, to the point where analysis of multi-terabyte datasets, while still daunting, is at least conceivable.

scholarly journals Precession Azimuth Sensing with Low-Noise Molecular Electronics Angular Sensors

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Dmitry L. Zaitsev ◽  
Vadim M. Agafonov ◽  
Egor V. Egorov ◽  
Alexander N. Antonov ◽  
Vladimir G. Krishtop
Keyword(s):  
Molecular Electronics ◽  
Low Cost ◽  
Rotational Velocity ◽  
High Sensitivity ◽  
Low Noise ◽  
Motion Sensors ◽  
Noise Performance ◽  
Rotating Platform ◽  
Vector Projection ◽  
Signal Processing Algorithms

This paper describes the use of MET-based low-noise angular motion sensors to precisely determine azimuth direction in a dynamic-scheme method of measuring the Earth’s rotational velocity vector. The scheme includes sensor installation on a rotating platform so that it could scan the space and seek for the position of the highest Earth’s rotation vector projection on its axis. This method is very efficient provided a low-noise sensor is used. A low-cost angular sensor based on MET (molecular electronic transduction) technology has been used. The sensors of this kind were originally developed for seismic activity monitoring and are well known for very good noise performance and high sensitivity. This approach, combined with the use of special signal processing algorithms, allowed reaching the accuracy of 0.2°, while the measurement time was less than 100 seconds.

A Very Simple Low Noise Voltage Preamplifier For High Sensitivity Noise Measurements

2009 ◽  
Author(s):  
G. Cannatà ◽  
G. Scandurra ◽  
C. Ciofi ◽  
Massimo Macucci ◽  
Giovanni Basso
Keyword(s):  
High Sensitivity ◽  
Low Noise ◽  
Noise Voltage ◽  
Noise Measurements

Low noise InAs avalanche photodiodes for high sensitivity FPAs

2008 ◽  
Author(s):  
Andrew R. J. Marshall ◽  
Chee Hing Tan ◽  
Matthew J. Steer ◽  
John P. R. David
Keyword(s):  
Avalanche Photodiodes ◽  
High Sensitivity ◽  
Low Noise
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