Figure 7 - uploaded by Sergio Rescia
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common mode transfer function measurement setup, with one injection probe (a) and two current probes (b and c).
Source publication
The front-end electronics of the ATLAS Liquid Argon Calorimeter is powered by DC/DC converters nearby the front-end crates. They are fed by AC/DC converters located in a remote control room through long power cables. The stability of the power distribution scheme is compromised by the impedance of the long interconnection cable, and proper matching...
Citations
... When LISN-devices are not available for the application at industrial sites, the use of RF voltage probes have been proposed by [13]. Other approach is the use of current transducers instead of LISN as proposed by [14] and [15] for industrial installation with a large quantity of converter systems to be measured. Commonly, for reducing conductive emissions the application of an input EMI filter is considered. ...
... It is important taking into account that a variation of this method has been used in CERN, oriented to high energy physics experiments, as detailed in [18]. Results presented in and [14], [15] have been based on this method. For this reason, the proposed method is a real aid for EMC in industrial or nonideal environment. ...
... Several variables can be measured simultaneously and using a setup based on a PC with modern acquisition boards with DSP's and FPGA's, a monitoring system for surveillance of EMC compliance can be arranged giving an early warning if abnormal operating conditions happen. A broad analysis can be done: Peak, Quasi-Peak, RMS, Average, Correlation and others, can be performed quickly and cost effective [11], [15]. Benefits are obtained regarding the declining prices of sensors and data acquisition units and the ubiquitous availability of personal computers. ...
Reliability and safety of critical industrial processes depend on EMC of electronic equipments for ensuring signals integrity. Increasing complexity and quantity of power converters in industrial facilities state the challenge for efficient and fast testing for EMC compliance. This paper proposes a novel combination of EMC testing equipment for pre-compliance testing when EMC test sites are either unavailable or not appropriately priced for the given application. The proposed methods use modern data acquisition and processing equipment to allow a rapid development of hardware and software for in-house or out-in-the-field pre-compliance testing.
The ATLAS detector has been designed for operation at the Large Hadron Collider at CERN. ATLAS includes electromagnetic and hadronic liquid argon calorimeters, with almost 200,000 channels of data that must be sampled at the LHC bunch crossing frequency of 40 MHz. The calorimeter electronics calibration and readout are performed by custom electronics developed specifically for these purposes. This paper describes the system performance of the ATLAS liquid argon calibration and readout electronics, including noise, energy and time resolution, and long term stability, with data taken mainly from full-system calibration runs performed after installation of the system in the ATLAS detector hall at CERN.
