Ciro Tremola
Publications
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AN INTERPOLATION METHOD TO CALIBRATE ELECTROMAGNETIC PROBES IN SEMIANECHOIC CHAMBERS
Progress In Electromagnetics Research B. 03/2012; 39:355-371.
Based upon the standard IEEE 1309, a new calibration method for electromagnetic (EM) probes is proposed. The aforementioned method compares the electric field strength measured with the EM probe subject to calibration with the E-field intensity calculated through a linear interpolation of the correc... [more] Based upon the standard IEEE 1309, a new calibration method for electromagnetic (EM) probes is proposed. The aforementioned method compares the electric field strength measured with the EM probe subject to calibration with the E-field intensity calculated through a linear interpolation of the corrected measurement using a reference EM probe. The corrected measurement results are computed by means of the calibration factors stated in the calibration certificate of the reference EM probe. The conditions and criteria under which it is possible to calibrate EM probes inside semi-anechoic chambers in the frequency range of 80 MHz to 1 GHz, are presented. The results shows that the calibration method proposed in this paper is characterized by deviations of less than 1 dB in almost all the frequencies considered, verifying the reliability of the method. The proposed approach is very useful for registering the measurement drift of EM probes used in EMC testing laboratories.
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Validation testing of a direct-to-home (DTH) satellite television receiver in the Ku band
Latin America Transactions, IEEE (Revista IEEE America Latina). 04/2011;
The aim of this study was to establish the necessary setups for the measurement of the basic parameters of a commercial DTH receiver based on the standardized measurement techniques in order to provide the Venezuelan state a system of quality management to ensure well-functioning of equipment being ... [more] The aim of this study was to establish the necessary setups for the measurement of the basic parameters of a commercial DTH receiver based on the standardized measurement techniques in order to provide the Venezuelan state a system of quality management to ensure well-functioning of equipment being procured to provide the end user, the digital satellite television service. The tests were done by measuring the variables of interest from the three major subsystems that make DTH system: internal unit, low noise block and the antenna system.
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Comparison of the GUM and Monte Carlo Methods for the Uncertainty Estimation In Electromagnetic Compatibility Testing
Progress In Electromagnetics Research B. 01/2011; 34:125-144.
The rigorous uncertainty estimation in Electromagnetic Compatibility (EMC) testing is a complex task that has been addressed through a simplified approach that typically assumes that all the contributions are uncorrelated and symmetric, and combine them in a linear or linearized model using the erro... [more] The rigorous uncertainty estimation in Electromagnetic Compatibility (EMC) testing is a complex task that has been addressed through a simplified approach that typically assumes that all the contributions are uncorrelated and symmetric, and combine them in a linear or linearized model using the error propagation law. These assumptions may affect the reliability of test results, and therefore, it is advisable to use alternative methods, such as Monte Carlo Method (MCM), for the calculation and validation of measurement uncertainty. This paper presents the results of the estimation of uncertainty for some of the most common EMC tests, such as: the measurement of radiated and conducted emissions according to CISPR 22 and radiated (IEC 61000-4-3) and conducted (IEC 61000-4-6) immunity, using both the conventional techniques of the Guide to the Expression of Uncertainty in Measurement (GUM) and the Monte Carlo Method. The results show no significant differences between the uncertainty estimated using the aforementioned methods, and it was observed that the GUM uncertainty framework slightly overestimates the overall uncertainty for the cases evaluated here. Although the GUM Uncertainty Framework proves to be adequate for the particular EMC tests that were considered, generally the Monte Carlo Method has features that avoid the assumptions and the limitations of the GUM Uncertainty Framework.
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A Proposed Method for Quantifying Uncertainty in RF Immunity Testing Due to EUT Presence
Progress In Electromagnetics Research B. 01/2011; 29:175-190.
Throughout the performance of a RF immunity test according IEC 61000-4-3 there are several factors that should be taken into account to ensure the quality and to estimate the uncertainty associated to the results. One phenomenon that should be considered to calculate uncertainty is the disturbing ef... [more] Throughout the performance of a RF immunity test according IEC 61000-4-3 there are several factors that should be taken into account to ensure the quality and to estimate the uncertainty associated to the results. One phenomenon that should be considered to calculate uncertainty is the disturbing effect produced by the EUT over the electric field generated within the calibrated uniform field area; nevertheless the mentioned effect is not easily quantifiable because the measuring process using additional antennas or field probes inside the semianechoic chamber could also alter the electric field distribution. An experimental method for quantifying the mentioned uncertainty contribution is presented. The method is based upon the fact that antenna-EUT coupling and reflection effects could be measured through changes in the input impedance of the field generation antenna. A validation procedure for the proposed method is also described. Hence, a relationship between the reflection coefficient at the antenna input port and the electric field strength is derived. The uncertainty contribution is calculated through the maximum relative change in the E-field intensity magnitude for the frequency range of 80-1000 MHz, considering the worst case for several EUT positions.
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Evaluación de la compatibilidad electromagnética en ambientes hospitalarios
Revista de Bioingenería y Física Médica Cubana. 01/2011; 12:15-21.
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1.59Impact points
Data Acquisition System of the Virgo Gravitational Waves Interferometric Detector
Nuclear Science, IEEE Transactions on. 03/2008;
Virgo is an experiment aiming at the detection of gravitational waves emitted by astrophysical sources. Its detector, based on a 3 km arms interferometer, is a complex setup which requires several digital control loops running up to 10 kHz, an accurate and reliable central timing system and an effic... [more] Virgo is an experiment aiming at the detection of gravitational waves emitted by astrophysical sources. Its detector, based on a 3 km arms interferometer, is a complex setup which requires several digital control loops running up to 10 kHz, an accurate and reliable central timing system and an efficient data acquisition, all of them being distributed over 3 km. We overview here the main hardware and software components developed for the data acquisition system (DAQ) and its current architecture. Then, we briefly discuss its connections with interferometer's controls, especially through the automation of the interferometer's startup procedure. Then, we describe the tools used to monitor the DAQ and the performances we measured with them. Finally, are described also the tools developed for the online detector monitoring, mandatory complement of the DAQ for the commissioning of the Virgo detector.
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1.59Impact points
The Real-Time Distributed Control of the Virgo Interferometric Detector of Gravitational Waves
Nuclear Science, IEEE Transactions on. 03/2008;
The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology. In particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its point, a very complex distributed a... [more] The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology. In particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its point, a very complex distributed and supervised control system has been implemented. The current constraints are about 10<sup>-10</sup> m RMS for the longitudinal control ("Locking") and 10<sup>-9</sup> rad RMS for the angular degrees of freedom ("Alignment"). These requirements are satisfied by means of a specially designed hierarchical architecture for the local control system. It is necessary for managing the hard task of filtering all the environmental noises that limit the sensitivity of the interferometer. On the other end, the interferometer is supervised by a distributed global control system to maintain the detector fully operational. In this paper we describe the status of the real-time distributed control system of the Virgo interferometric detector of Gravitational waves, its performances and planned improvements.
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1.41Impact points
Measurement of the optical parameters of the Virgo interferometer.
Applied optics. 07/2007; 46(17):3466-84.
The Virgo interferometer, aimed at detecting gravitational waves, is now in a commissioning phase. Measurements of its optical properties are needed for the understanding of the instrument. We present the techniques developed for the measurement of the optical parameters of Virgo. These parameters a... [more] The Virgo interferometer, aimed at detecting gravitational waves, is now in a commissioning phase. Measurements of its optical properties are needed for the understanding of the instrument. We present the techniques developed for the measurement of the optical parameters of Virgo. These parameters are compared with the Virgo specifications.
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0.32Impact points
Propagation of linear MHD waves in a hydrogen plasma: the mode crossing problem.
Revista Mexicana de Fisica. 01/2006; S52(3).
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2.48Impact points
Propagation of thermal and hidromagnetic waves in a ionizing-recombining Hydrogen Plasma.
Physics of Plasmas. 01/2004; 11:1631-1644.
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2.48Impact points
Propagation of sound and thermal waves in an ionizing-recombining hydrogen plasma: Revision of results.
Physics of Plasmas. 01/2002; 9(11).
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The Real-time Distributed Control of the Virgo Interferometric Detector of Gravitational Waves
Real-Time Conference, 2007 15th IEEE-NPSS;
The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology, in particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its working point, a very complex distr... [more] The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology, in particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its working point, a very complex distributed and supervised control system has been implemented. The current constraints are about 10<sup>-10</sup> m RMS for the longitudinal control ( "Locking" ) and 10<sup>-9</sup> rad RMS for the angular degrees of freedom ( " Alignment " ). These requirements are satisfied by means of a specially designed hierarchical architecture for the local control system, necessary for managing the hard task of filtering all the environments noises that limit the sensitivity of the interferometer, supervised by a distributed global control system to maintain the detector fully operational. In this paper we described the status of the real - time distributed control system of the Virgo interferometric detector of Gravitational waves, its performances and planned improvements.
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The real-time distributed control of the Virgo Interferometric Detector of Gravitational Waves
The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology, in particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its working point, a very complex distr... [more] The VIRGO experiment for the detection of gravitational waves is a big challenge both for physics and for technology, in particular, to satisfy the stringent requirements on the alignment and position of its suspended optical components to keep the detector at its working point, a very complex distributed and supervised control system has been implemented. The current constraints are about 10-10 m RMS for the longitudinal control (‘‘Locking'') and 10-9 rad RMS for the angular degrees of freedom (‘‘Alignment''). These requirements are satisfied by means of a specially designed hierarchical architecture for the local control system, necessary for managing the hard task of filtering all the environmental noises that limit the sensitivity of the interferometer, supervised by a distributed global control system to maintain the detector fully operational. In this paper we describe the status of the real-time distributed control system of the Virgo interferometric detector of Gravitational waves, its performances and planned improvements.
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Data Acquisition System of the Virgo Gravitational Waves Interferometric Detector
Real-Time Conference, 2007 15th IEEE-NPSS;
Virgo is an experiment aiming at the detection of gravitational waves emitted by astrophysical sources. Its detector, based on a 3 km arms interferometer, is a complex setup which requires several digital control loops running up to 10 kHz, an accurate and reliable central timing system and an effic... [more] Virgo is an experiment aiming at the detection of gravitational waves emitted by astrophysical sources. Its detector, based on a 3 km arms interferometer, is a complex setup which requires several digital control loops running up to 10 kHz, an accurate and reliable central timing system and an efficient data acquisition, all of them being distributed over 3 km. We overview here the main hardware and software components developed for the data acquisition system (DAQ) and its current architecture. Then, we briefly discuss its connections with interferometer's controls, especially through the automation of the interferometer's startup procedure. Then, we describe the tools used to monitor the DAQ and the performances we measured with them. Finally, are described also the tools developed for the online detector monitoring, mandatory complement of the DAQ for the commissioning of the virgo detector.
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Validation testing of a direct-to-home (DTH) satellite television receiver in the Ku band
Latin America Transactions, IEEE (Revista IEEE America Latina). 9:798-803.
The aim of this study was to establish the necessary setups for the measurement of the basic parameters of a commercial DTH receiver based on the standardized measurement techniques in order to provide the Venezuelan state a system of quality management to ensure well-functioning of equipment being ... [more] The aim of this study was to establish the necessary setups for the measurement of the basic parameters of a commercial DTH receiver based on the standardized measurement techniques in order to provide the Venezuelan state a system of quality management to ensure well-functioning of equipment being procured to provide the end user, the digital satellite television service. The tests were done by measuring the variables of interest from the three major subsystems that make DTH system: internal unit, low noise block and the antenna system.
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Measurement of the optical parameters of the Virgo interferometer
The Virgo interferometer, aimed at detecting gravitational waves, is now in a commissioning phase. Measurements of its optical properties are needed for the understanding of the instrument. The techniques developed for the measurement of the optical parameters of Virgo are presented in this paper. T... [more] The Virgo interferometer, aimed at detecting gravitational waves, is now in a commissioning phase. Measurements of its optical properties are needed for the understanding of the instrument. The techniques developed for the measurement of the optical parameters of Virgo are presented in this paper. These parameters are compared to the Virgo specifications.
Following (3)
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Marco Azpurua
Fundación Instituto de Ingeniería -
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L. Milano
INFN - Istituto Nazionale di Fisica Nucleare
