Method for calibrating a Rogowski coil of fast time response

2007 ◽  
Vol 78 (8) ◽  
pp. 084702 ◽  
Author(s):  
Rui Liu ◽  
Xinxin Wang ◽  
Xiaobing Zou ◽  
Jianqiang Yuan ◽  
Naigong Zou ◽  
...  
Keyword(s):  
Rogowski Coil ◽  
Time Response ◽  
Fast Time

High-quantum-efficiency photomultiplier with fast time response

1993 ◽  
Author(s):  
Ross A. La Rue ◽  
John P. Edgecumbe ◽  
Gary A. Davis ◽  
Brad Gospe ◽  
Verle W. Aebi
Keyword(s):  
Quantum Efficiency ◽  
Time Response ◽  
Fast Time ◽  
High Quantum Efficiency ◽  
High Quantum

Fast time-response photoacoustic studies and modelling of KrF laser ablated YBa2Cu3O7

1992 ◽  
Vol 54 ◽  
pp. 255-263 ◽  
Author(s):  
P.E. Dyer ◽  
S.R. Farrar ◽  
P.H. Key
Keyword(s):  
Time Response ◽  
Fast Time ◽  
Krf Laser

Study on Time Characteristics of Fast Time Response Plastics Scintillator EJ-232

2011 ◽  
Vol 31 (12) ◽  
pp. 1216001
Author(s):  
彭晓世 Peng Xiaoshi ◽  
王峰 Wang Feng ◽  
徐涛 Xu Tao ◽  
刘永刚 Liu Yonggang ◽  
刘慎业 Liu Shenye ◽  
...  
Keyword(s):  
Time Response ◽  
Fast Time

Time Response Analysis of Ag-Cs2O Photoelectric Thin Film

2011 ◽  
Vol 396-398 ◽  
pp. 2153-2157
Author(s):  
Li Sha Zhang ◽  
Hong Xia Dai
Keyword(s):  
Thin Film ◽  
High Speed ◽  
Vital Role ◽  
Time Response ◽  
Response Analysis ◽  
Fast Time ◽  
Short Pulses ◽  
Optical Signals ◽  
Time Response Analysis ◽  
Multi Wavelength

Photoelectric thin film is an important information functional material transforming optical signals into electric signals. Composite dielectric photoelectric thin film formed by burying metal nanoparticles in semiconductors is different from traditional photoelectric thin film. It has ultra-fast time response, plays a vital role in the conversion of photoelectric pulses and the diagnosis and measurement of multi-wavelength ultra-short pulses and may be applied in high-speed optical and optoelectronic devices.

scholarly journals Simultaneous Detection of Ozone and Nitrogen Dioxide by Oxygen Anion Chemical Ionization Mass Spectrometry: A Fast Time Response Sensor Suitable for Eddy Covariance Measurements

2019 ◽  
Author(s):  
Gordon A. Novak ◽  
Michael P. Vermeuel ◽  
Timothy H. Bertram
Keyword(s):  
Mass Spectrometry ◽  
Nitrogen Dioxide ◽  
Eddy Covariance ◽  
Chemical Ionization ◽  
Limit Of Detection ◽  
Deposition Velocity ◽  
Time Response ◽  
Ionization Mass ◽  
Fast Time ◽  
Oxygen Anion

Abstract. We report on the development, characterization, and field deployment of a fast time response sensor for measuring ozone (O3) and nitrogen dioxide (NO2) concentrations utilizing chemical ionization time-of-flight mass spectrometry (CI-ToFMS) with oxygen anion (O2−) reagent ion chemistry. We demonstrate that the oxygen anion chemical ionization mass spectrometer (Ox-CIMS) is highly sensitive to both O3 (180 ions s−1 pptv−1 pptv−1) and NO2 (97 ions s−1 pptv−1), corresponding to detection limits (3σ, 1 s averages) of 13 and 9.9 pptv, respectively. In both cases, the detection threshold is limited by the magnitude and variability in the background determination. The short-term precision (1 s averages) is better than 0.3% at 10 ppbv O3 and 4% at 10 pptv NO2. We demonstrate that the sensitivity of the O3 measurement to fluctuations in ambient water vapor and carbon dioxide is negligible for typical conditions encountered in the troposphere. The application of the Ox-CIMS to the measurement of O3 vertical fluxes over the coastal ocean, via eddy covariance (EC), was tested during summer 2018 at Scripps Pier, La Jolla CA. The observed mean ozone deposition velocity (vd(O3)) was 0.011 cm s−1 pptv−1 with a campaign ensemble limit of detection (LOD) of 0.0042 cm s−1 pptv−1 at the 95% confidence level, from each 27-minute sampling period LOD. The campaign mean and one standard deviation range of O3 mixing ratios were 38.9 ± 12.3 ppbv. Several fast ozone titration events from local NO emissions were sampled where unit conversion of O3 to NO2 was observed, highlighting instrument utility as a total odd oxygen (Ox = O3 + NO2) sensor. The demonstrated precision, sensitivity, and time resolution of this instrument highlight its potential for direct measurements of O3 ocean–atmosphere and biosphere–atmosphere exchange from both stationary and mobile sampling platforms.

scholarly journals A cavity-enhanced ultraviolet absorption instrument for high-precision, fast-time-response ozone measurements

2020 ◽  
Vol 13 (12) ◽  
pp. 6877-6887
Author(s):  
Reem A. Hannun ◽  
Andrew K. Swanson ◽  
Steven A. Bailey ◽  
Thomas F. Hanisco ◽  
T. Paul Bui ◽  
...  
Keyword(s):  
Marine Boundary Layer ◽  
Light Emitting Diode ◽  
Optical Cavity ◽  
Deposition Velocity ◽  
Flux Measurement ◽  
Ultraviolet Absorption ◽  
Time Response ◽  
Integration Time ◽  
Fast Time ◽  
Optical Cell

Abstract. The NASA Rapid Ozone Experiment (ROZE) is a broadband cavity-enhanced UV (ultraviolet) absorption instrument for the detection of in situ ozone (O3). ROZE uses an incoherent LED (light-emitting diode) light source coupled to a high-finesse optical cavity to achieve an effective pathlength of ∼ 104 m. Due to its high sensitivity and small optical cell volume, ROZE demonstrates a 1σ precision of 80 pptv (parts per trillion by volume) in 0.1 s and 31 pptv in a 1 s integration time, as well as an e-fold time response of 50 ms. ROZE can be operated in a range of field environments, including low- and high-altitude research aircraft, and is particularly suited to O3 vertical-flux measurements using the eddy covariance technique. ROZE was successfully integrated aboard the NASA DC-8 aircraft during July–September 2019 and validated against a well-established chemiluminescence measurement of O3. A flight within the marine boundary layer also demonstrated flux measurement capabilities, and we observed a mean O3 deposition velocity of 0.029 ± 0.005 cm s−1 to the ocean surface. The performance characteristics detailed below make ROZE a robust, versatile instrument for field measurements of O3.

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