A New Algorithm for Spectral Drift Calculation in a Gamma-Ray Spectrometer

Spectral drift of any origin consisting of detectors and nuclear electronics affects the long-term stability in a gamma-ray spectrometer, which is essential to maintaining the high quality of gamma energy spectra. The feedback regulation according to the quantity of spectral drift can restore the system’s stability. A new algorithm for spectral drift calculation is given in this paper. A digital logic unit is developed in a FPGA chip based on the algorithm, and a MCU coordinating with it can fast calculate the spectral drift within only less than 110 instruction periods.

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Determination of Long-Term Stability and Quality of HT-PEM MEAs

ECS Transactions ◽

10.1149/08613.0301ecst ◽

2018 ◽

Vol 86 (13) ◽

pp. 301-314

Author(s):

Maren Rastedt ◽

Julian Büsselmann ◽

Tomas Klicpera ◽

Karsten Reinwald ◽

Nadine Pilinski ◽

...

Keyword(s):

Term Stability ◽

Long Term Stability

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Validation of the IASI FORLI/Eumetsat ozone products using satellite (GOME-2), ground-based (Brewer-Dobson, SAOZ) and ozonesonde measurements

10.5194/amt-2017-461 ◽

2018 ◽

Cited By ~ 3

Author(s):

Anne Boynard ◽

Daniel Hurtmans ◽

Katerina Garane ◽

Florence Goutail ◽

Juliette Hadji-Lazaro ◽

...

Keyword(s):

A Priori ◽

Long Term Stability ◽

Comparison Results ◽

Independent Observations ◽

Mean Differences ◽

A Priori Uncertainty ◽

The Tropics ◽

Global Mean

Abstract. This paper assesses the quality of IASI/Metop-A (IASI-A) and IASI/Metop-B (IASI-B) ozone (O3) products (total and partial O3 columns) retrieved with the Fast Optimal Retrievals on Layers for IASI Ozone (FORLI-O3) v20151001 software for nine years (2008–2017) through an extensive inter-comparison and validation exercise using independent observations (satellite, ground-based and ozonesonde). IASI-A and IASI-B Total O3 Columns (TOCs) are generally consistent, with a global mean difference less than 0.3 % for both day- and nighttime measurements, IASI-A being slightly higher than IASI-B. A global difference less than 2.4 % is found for the tropospheric (TROPO) O3 column product (IASI-A being lower than IASI-B), which is partly due to a temporary issue related to IASI-A viewing angle in 2015. Our validation shows that IASI-A and IASI-B TOCs are consistent with GOME-2, Dobson, Brewer and SAOZ retrieved ones, with global mean differences in the range 0.1–2 % depending on the instruments. The IASI-A and ground-based TOC comparison for the period 2008–July 2017 shows good long-term stability (negative trends within 3 % decade−1). The comparison results between IASI-A and IASI-B against smoothed ozonesonde partial O3 columns vary in altitude and latitude, with maximum standard deviation for the 300–150 hPa column (20–40 %) due to strong ozone variability and a priori uncertainty. The worst agreement with the ozonesondes and with UV-vis retrieved TOC [satellite and ground] is found at the southern high latitudes. Compared to ozonesonde data, IASI-A and IASI-B O3 products overestimate the O3 abundance in the stratosphere (up to 20 % for the 150–25 hPa column) and underestimates the O3 abundance in the troposphere (within 10 % for the mid-latitudes and ~ 18 % for the tropics). Based on the period 2011–2016, non-significant drift is found for the northern hemispheric tropospheric columns while a small drift prevails for the period before 2011.

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Performance Characteristics of Cdte Gamma-Ray Spectrometers

MRS Proceedings ◽

10.1557/proc-302-507 ◽

1993 ◽

Vol 302 ◽

Cited By ~ 5

Author(s):

Michael R. Squillante ◽

Herbert Cole ◽

Peter Waer ◽

Gerald Entine

Keyword(s):

Gamma Ray ◽

Detection Efficiency ◽

Device Fabrication ◽

Long Term Stability ◽

High Detection Efficiency ◽

Plant Monitoring ◽

Cdznte Detectors ◽

Nuclear Detectors ◽

Nuclear Detector

ABSTRACTThe use of cadmium telluride (CdTe) semiconductor nuclear detectors is continuing to expand into new areas because of their unique properties which include room temperature operation and high detection efficiency. In addition, they remain the material of choice in many critical applications such as nuclear medicine and power plant monitoring because of their reputation for reliability and long term stability1. CdTe is by far the most developed of the compound semiconductors used in nuclear detector applications and it offers a number of significant benefits to researchers, clinicians and engineers who have special requirements relating to size, sensitivity and operating temperature.Recently, there have been improvements in the growth of the crystalline material and in the fabrication procedures which have resulted in better performance and in the ability to produce arrays. This article describes the physical and electronic properties of CdTe nuclear detectors, discusses how the crystal growth and device fabrication procedures can affect these properties, and compares the performance to CdZnTe detectors.

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Changes of Insulation Properties of Photovoltaic Cables Caused by Ageing Treatment

Transactions on Electrical Engineering ◽

10.14311/tee.2017.1.006 ◽

2020 ◽

Vol 6 (1) ◽

pp. 6-9 ◽

Cited By ~ 1

Author(s):

Juraj Packa ◽

Vladimir Kujan ◽

Daniel Štrkula ◽

Vladimír Šály ◽

Milan Perný

Keyword(s):

Power Plants ◽

Real Life ◽

Life Time ◽

Operating Conditions ◽

Solar Panels ◽

Font Size ◽

Long Term Stability ◽

Cable Systems

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-US">An important part of the photovoltaic power plants are cable systems. The dielectric properties of cables, reliability and durability depend on quality of production processes, operating conditions and degradation factors, as well. Expected lifetime of cable systems is more than 20-30 years in general. Their failure free operation and long-term stability of properties has a direct impact on the economic return of the investments. According to our experiences the tests in compliance with valid standards are not adequate to verify real life time during operation. Photovoltaic cables intended for use in outdoor applications for the connection between the solar panels and possible connection between panels and inverter were chosen for our experiments. <span style="-ms-layout-grid-mode: line;">The changes </span>of insulation resistance and breakdown voltage caused by some degradation factors, mainly water, are presented. This research was inspired by real failure in operation.</span>

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LONG-TERM STABILITY OF NONTHERMAL X-RAY MODULATION IN THE GAMMA-RAY BINARY LS 5039

The Astrophysical Journal ◽

10.1088/0004-637x/697/1/l1 ◽

2009 ◽

Vol 697 (1) ◽

pp. L1-L5 ◽

Cited By ~ 33

Author(s):

Tetsuichi Kishishita ◽

Takaaki Tanaka ◽

Yasunobu Uchiyama ◽

Tadayuki Takahashi

Keyword(s):

Gamma Ray ◽

X Ray ◽

Term Stability ◽

Long Term Stability

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Long-term stability study of the passivation quality of polysilicon-based passivation layers for silicon solar cells

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2020.110691 ◽

2020 ◽

Vol 215 ◽

pp. 110691

Author(s):

Di Kang ◽

Hang Cheong Sio ◽

Di Yan ◽

Wenhao Chen ◽

Jie Yang ◽

...

Keyword(s):

Solar Cells ◽

Stability Study ◽

Silicon Solar Cells ◽

Term Stability ◽

Long Term Stability ◽

Passivation Layers

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Performance Characteristics of CDTE Gamma-Ray Spectrometers

MRS Proceedings ◽

10.1557/proc-299-259 ◽

1994 ◽

Vol 299 ◽

Author(s):

Michael R. Squillante ◽

Herbert Cole ◽

Peter Waer ◽

Gerald Entine

Keyword(s):

Gamma Ray ◽

Detection Efficiency ◽

Device Fabrication ◽

Long Term Stability ◽

High Detection Efficiency ◽

Plant Monitoring ◽

Cdznte Detectors ◽

Nuclear Detectors ◽

Nuclear Detector

AbstractThe use of cadmium telluride (CdTe) semiconductor nuclear detectors is continuing to expand into new areas because of their unique properties which include room temperature operation and high detection efficiency. In addition, they remain the material of choice in many critical applications such as nuclear medicine and power plant monitoring because of their reputation for reliability and long term stability1. CdTe is by far the most developed of the compound semiconductors used in nuclear detector applications and it offers a number of significant benefits to researchers, clinicians and engineers who have special requirements relating to size, sensitivity and operating temperature.Recently, there have been improvements in the growth of the crystalline material and in the fabrication procedures which have resulted in better performance and in the ability to produce arrays. This article describes the physical and electronic properties of CdTe nuclear detectors, discusses how the crystal growth and device fabrication procedures can affect these properties, and compares the performance to CdZnTe detectors.

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Why settle when there are plenty of fish in the sea? Rusbult’s investment model applied to online dating

New Media & Society ◽

10.1177/1461444820937660 ◽

2020 ◽

pp. 146144482093766

Author(s):

Liesel L Sharabi ◽

Elisabeth Timmermans

Keyword(s):

Online Dating ◽

Investment Model ◽

Mixed Methods Study ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Long Term Stability ◽

Lower Likelihood ◽

Dating Relationship

The current mixed-methods study reports the results of a cross-sectional survey of 205 online daters and uses the Investment Model to examine the antecedents of commitment in online dating and users’ decisions to delete their online dating account(s). We hypothesized that the quality of alternatives, investments, and satisfaction with the online dating relationship would mediate the association between online dating intensity and commitment, which, in turn, would predict the intention to terminate an account. The analyses revealed that online dating intensity was associated with greater commitment and a lower likelihood of account termination. There were also specific indirect effects on commitment through the quality of alternatives, investments, and satisfaction, and on termination through investments. Responses to an open-ended question provided more information about users’ decisions to quit online dating. These results point to ways online dating may facilitate the desire for commitment while potentially undermining the long-term stability of relationships.

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