Instrumentation amplifiers and voltage controlled current sources for LHC cryogenic instrumentation



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Agapito Serrano, Juan Andrés and Barradas, Nuno P. and Cardeira, Fernando M. and Casas-Cubillos, Juan and Fernandes, Ana C. and Franco Peláez, Francisco Javier and Gomes, Paulo and Gonçalves, ISabel C. and Hernández Cachero, Antonio and Lozano Rogado, Jesús and Martin Barreales, Miguel Ángel and Marques, José G. and Paz López, Antonio and Prata, María José and Ramalho, Antonio J. G. and Rodríguez-Ruiz, Miguel Ángel and Santos Blanco, José Pedro and Vieira, A. (2000) Instrumentation amplifiers and voltage controlled current sources for LHC cryogenic instrumentation. In Proceedings of the sixth Workshop on Electronics for LHC Experiments. CERN European Organization for Nuclear Research -Reports- Cern . CERN Publishing Service, Geneva, Switzerland, pp. 275-279. ISBN 92-9083-172-3

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Instrumentation amplifiers and voltage controlled current sources have been designed by using single operational amplifiers (OPA124, TLE2071 and OPA627). Their performance has been evaluated in the laboratory and under neutron radiation. On line measurements of the offset voltages, offset currents, closed loop gain, CMRR and bias currents were performed on the amplifiers. The current sources were set to a constant value and the current was monitored on-line. The radiation tolerance of commercial voltage references has also been investigated.

The radiation was performed out in ITN (Portugal) research nuclear reactor. In comparison to previous experimental campaigns the gamma radiation has been reduced by a factor 15 for a given neutron dose. This is achieved thanks to a recently constructed facility for neutron beam extraction

Item Type:Book Section
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© 2000 CERN (License: CC-BY-3.0).
ISSN: 0007-8328.

Workshop on Electronics for LHC Experiments(6. 2000. Krakow, Polonia)

This work has been financed by the co-operation agreement K476/LHC between CERN & UCM, by the Spanish research agency CICYT (TIC98-0737), by the Private Foundation “Miguel Casado San José”, and by the Portuguese research agency ICCTI (CERN/15181/99).

Uncontrolled Keywords:Radiation effects; Instrumentation amplifiers; Electronics; Operational amplifiers; CERN
Subjects:Sciences > Physics > Electronics
Sciences > Physics > Radioactivity
ID Code:28992
Deposited On:16 Mar 2015 17:58
Last Modified:10 Dec 2018 14:58

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