A compact and low noise voltage preamplifier for high-sensitivity fission chamber

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.

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A High-Sensitivity Low-Noise HDR CMOS Image Sensor Based on Novel 6-TR. 1-CAP. Pixel for Scientific Applications

2019 China Semiconductor Technology International Conference (CSTIC) ◽

10.1109/cstic.2019.8755712 ◽

2019 ◽

Author(s):

Chen Li ◽

Jiebin Duan ◽

Xueqiang Gu ◽

Yong Wang ◽

Jianxin Wen ◽

...

Keyword(s):

High Sensitivity ◽

Cmos Image Sensor ◽

Image Sensor ◽

Low Noise ◽

Scientific Applications

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Electronic Optical Sky Surveys

Symposium - International Astronomical Union ◽

10.1017/s0074180900128207 ◽

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.

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Precession Azimuth Sensing with Low-Noise Molecular Electronics Angular Sensors

Journal of Sensors ◽

10.1155/2016/6148019 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 12

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.

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