Method for distance determination using range-gated imaging suitable for an arbitrary pulse shape

2017 ◽  
Author(s):  
Boris Kuntsevich ◽  
Vitaliy P. Kabashnikov
Keyword(s):  
Pulse Shape ◽  
Distance Determination ◽  
Gated Imaging

Distance Determination by Gated Viewing Systems Taking into Account the Illuminating Pulse Shape

2017 ◽  
Vol 84 (5) ◽  
pp. 850-858 ◽  
Author(s):  
V. A. Gorobets ◽  
B. F. Kuntsevich ◽  
D. V. Shabrov
Keyword(s):  
Pulse Shape ◽  
Distance Determination

scholarly journals Optimising broadband pulses for DEER depends on concentration and distance range of interest

2020 ◽  
Author(s):  
Andreas Scherer ◽  
Sonja Tischlik ◽  
Sabrina Weickert ◽  
Valentin Wittmann ◽  
Malte Drescher
Keyword(s):  
Form Factor ◽  
Noise Level ◽  
Pulse Shape ◽  
Modulation Depth ◽  
Distance Determination ◽  
Distance Range ◽  
Double Electron ◽  
Common Technique ◽  
Arbitrary Waveform ◽  
Double Electron Electron Resonance

Abstract. EPR distance determination in the nanometre region has become an important tool for studying the structure and interaction of macromolecules. Arbitrary waveform generators (AWGs), which have recently become commercially available for EPR spectrometers, have the potential to increase the sensitivity of the most common technique double electron-electron resonance (DEER, also called PELDOR), as they allow the generation of broadband pulses. There are several families of broadband pulses, which are different in general pulse shape and the parameters that define them. Here, we compare the most common broadband pulses. When broadband pulses lead to a larger modulation depth they also increase the background decay of the DEER trace. Depending on the dipolar evolution time this can significantly increase the noise level towards the end of the form factor and limit the potential increase of the modulation to noise ratio (MNR). We found asymmetric hyperbolic secant (HS{1,6}) pulses to perform best for short DEER traces leading to a MNR improvement of up to 86 % compared to rectangular pulses. For longer traces we found symmetric hyperbolic secant (HS{1,1}) pulses to perform best, however, the increase compared to rectangular pulses goes down to 43 %.

scholarly journals Optimising broadband pulses for DEER depends on concentration and distance range of interest

2020 ◽  
Vol 1 (1) ◽  
pp. 59-74
Author(s):  
Andreas Scherer ◽  
Sonja Tischlik ◽  
Sabrina Weickert ◽  
Valentin Wittmann ◽  
Malte Drescher
Keyword(s):  
Form Factor ◽  
Noise Level ◽  
Pulse Shape ◽  
Modulation Depth ◽  
Distance Determination ◽  
Distance Range ◽  
Double Electron ◽  
Common Technique ◽  
Arbitrary Waveform ◽  
Double Electron Electron Resonance

Abstract. EPR distance determination in the nanometre region has become an important tool for studying the structure and interaction of macromolecules. Arbitrary waveform generators (AWGs), which have recently become commercially available for EPR spectrometers, have the potential to increase the sensitivity of the most common technique, double electron–electron resonance (DEER, also called PELDOR), as they allow the generation of broadband pulses. There are several families of broadband pulses, which are different in general pulse shape and the parameters that define them. Here, we compare the most common broadband pulses. When broadband pulses lead to a larger modulation depth, they also increase the background decay of the DEER trace. Depending on the dipolar evolution time, this can significantly increase the noise level towards the end of the form factor and limit the potential increase in the modulation-to-noise ratio (MNR). We found asymmetric hyperbolic secant (HS{1,6}) pulses to perform best for short DEER traces, leading to a MNR improvement of up to 86 % compared to rectangular pulses. For longer traces we found symmetric hyperbolic secant (HS{1,1}) pulses to perform best; however, the increase compared to rectangular pulses goes down to 43 %.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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