scholarly journals Modification of method of sampling radiation source particle in spherical geometry

2020 ◽  
Vol 69 (11) ◽  
pp. 119501
Author(s):  
Yu-Pei Xu ◽  
Shu Li
Keyword(s):  
Radiation Source ◽  
Spherical Geometry ◽  
Source Particle

CONSTRUCTION AND TEST OF A CHANNELING-RADIATION SOURCE AT THE NEW DARMSTADT SUPERCONDUCTING ELECTRON ACCELERATOR

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-95-C9-98
Author(s):  
W. LOTZ ◽  
H. GENZ ◽  
A. RICHTER ◽  
W. KNÜPFER ◽  
J. P.F. SELLSCHOP
Keyword(s):  
Radiation Source ◽  
Electron Accelerator ◽  
Channeling Radiation

Development and Characteristics of Pulsed Radiation Source Generated by Electron Beam Irradiation using Intense Pulsed Power Generator

2019 ◽  
Vol 139 (10) ◽  
pp. 435-436
Author(s):  
Kenji Kashine ◽  
Fumihiro Tamura ◽  
Takashi Kikuchi ◽  
Weihua Jiang
Keyword(s):  
Electron Beam ◽  
Radiation Source ◽  
Electron Beam Irradiation ◽  
Pulsed Power ◽  
Beam Irradiation ◽  
Power Generator ◽  
Pulsed Power Generator

Image Evaluation of the High Resolution VUV Beam Line at Indus-I Synchrotron Radiation Source

1997 ◽  
Vol 26 (4) ◽  
pp. 181-192
Author(s):  
N. C. Das ◽  
B. N. Raja Sekhar
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
Radiation Source ◽  
Beam Line ◽  
Synchrotron Radiation Source ◽  
Image Evaluation

scholarly journals Simultaneous Acquisition of Ultrasound and Gamma Signals with a Single-Channel Readout

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1048
Author(s):  
Muhammad Nasir Ullah ◽  
Yuseung Park ◽  
Gyeong Beom Kim ◽  
Chanho Kim ◽  
Chansun Park ◽  
...  
Keyword(s):  
Radiation Source ◽  
Analog Circuit ◽  
Single Channel ◽  
Structural Information ◽  
Gamma Probe ◽  
Water Tank ◽  
Switching Circuit ◽  
Single Output ◽  
Analog Switch ◽  
The Us

We propose an integrated front-end data acquisition circuit for a hybrid ultrasound (US)-gamma probe. The proposed circuit consists of three main parts: (1) a preamplifier for the gamma probe, (2) a preprocessing analog circuit for the US, and (3) a digitally controlled analog switch. By exploiting the long idle time of the US system, an analog switch can be used to acquire data of both systems using a single output channel simultaneously. On the nuclear medicine (NM) gamma probe side, energy resolutions of 18.4% and 17.5% were acquired with the standalone system and with the proposed switching circuit, respectively, when irradiated with a Co-57 radiation source. Similarly, signal-to-noise ratios of 14.89 and 13.12 dB were achieved when US echo signals were acquired with the standalone system and with the proposed switching circuit, respectively. Lastly, a combined US-gamma probe was used to scan a glass target and a sealed radiation source placed in a water tank. The results confirmed that, by using a hybrid US-gamma probe system, it is possible to distinguish between the two objects and acquire structural information (ultrasound) alongside molecular information (gamma radiation source).

scholarly journals Design of modulated infrared laser as a radiation source of portable photoacoustic spectroscopy

2021 ◽  
Vol 1751 ◽  
pp. 012077
Author(s):  
D K Apriyanto ◽  
G A Pauzi ◽  
H R Ayu
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Radiation Source ◽  
Infrared Laser

FEW-PARTICLE ANYON EXCITON: EXACT SOLUTIONS

2003 ◽  
Vol 02 (06) ◽  
pp. 461-468
Author(s):  
D. G. W. PARFITT ◽  
M. E. PORTNOI
Keyword(s):  
Exact Solutions ◽  
Finite Size ◽  
Spherical Geometry ◽  
Planar Geometry ◽  
Quantum Liquid ◽  
Dimensional Electron ◽  
Adequate Description ◽  
Exciton Model ◽  
Finite Size Effects ◽  
Dimensional Electron Gas

The anyon exciton model, which describes an exciton against the background of an incompressible quantum liquid, is generalized to the case of an arbitrary number of anyons. Some mathematical aspects of this quantum-mechanical few-particle problem are considered and several exact solutions are obtained. The four-particle case is also considered in the classical limit in both planar and spherical geometries. Such a classical approach gives an adequate description of an anyon exciton at large separation between the valence hole and the two-dimensional electron gas. It is shown that in this limit in a planar geometry the anyon exciton is always energetically more favorable than a charged anyon ion. This indicates that the appearance of fractionally-charged anyon ions reported in recent numerical calculations is an artefact apparently caused by finite-size effects in a spherical geometry.

scholarly journals Methods for broadband signals mutual time delays estimating enhancement

2019 ◽  
Vol 30 ◽  
pp. 03012
Author(s):  
Ilya Grin ◽  
Oleg Morozov
Keyword(s):  
Time Delay ◽  
Computational Efficiency ◽  
Radiation Source ◽  
Time Delays ◽  
Time Delay Estimation ◽  
Ambiguity Function ◽  
Delay Estimation ◽  
Reliability Criterion ◽  
Optimal Processing ◽  
Narrowband Channels

This paper considers methods for estimating the mutual time delay of broadband signals recorded by satellites based multi-position systems for determining the location of a radiation source. All methods considered are based on modified algorithms for calculating the ambiguity function. The presented algorithms are based on the extraction of narrowband channels from the studied signals and their further optimal processing. The reliability criterion for mutual time delay estimation by the presented methods was evaluated. Based on the results and analysis of computational efficiency, viability of methods considered and their modifications was determined.

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