J. Marques

Publications (2)0 Total impact

• Conference Proceeding: Radiation-tolerant supervisory circuits

  Y. Zong, F.J. Franco, A.H. Cachero, J. Casas-Cubillos, M.A. Rodriguez-Ruiz, A.C. Fernandes, J. Marques, J.A. Agapito
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  ABSTRACT: This paper is devoted to the description of the evolution of different commercial microprocessor supervisory circuits under neutron radiation. After the irradiation, the tested devices showed some interesting changes: the increase of supply current and the duty cycles for watchdog timer. It was also observed that in some devices existed threshold voltage hysteresis and their trigger level was not in the usual TTL range of 0-5V.
  Electron Devices, 2005 Spanish Conference on; 03/2005
• Source

  Available from: cern.ch

  Article: Rad-Tol Pt-100 Isolation Amplifiers for the LHC Cryogenic System

  J A Agapito, J Casas-Cubillos, A Fernandes, F J Franco, I Goncalves, A H Cachero, J Marques, M A Rodríguez-Ruiz, Y Zong
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  ABSTRACT: The cryogenic system of the LHC will use Pt-100 sensors to measure temperatures between 40-300 K and isolation de-vices will be used. The selected commercial components must be rad-tolerant since a total radiation dose of 5·10 12 n/cm 2 & 100 Gy is expected during ten years of the LHC lifetime. Neutron tests in this family of devices were performed and the results are shown in this paper.