68 research outputs found
Test Station for a 30 m long Superconducting Link
The Large Hadron Collider (LHC) requires distribution of high electrical currents in the limited space of LHC tunnel. Four superconducting links of about 76 m length and one of 510 m will be installed in the tunnel to carry 6ĂÂ kA and 600 A. For validation of the longest link a test station was designed which is presently under construction. The design will permit the test station to be adapted for other links and/or cables as well. It will operate either in pool boiling mode, in order to measure thermal loads, or in forced super-critical helium flow mode to simulate real operation. Inlet pressure is 1.2 bar to 3 bar. Inlet temperature is adjustable from 4.4 K up to about 20 K. The station is being prepared to validate the LHC model link, consisting of 48 superconducting cables, each operating at 600 A between 4.5 K and 5.4 K. This article describes features of the equipment
Apprentissage de la conception de circuits intĂ©grĂ©s : une introduction par la technologie Ă lâaide dâun logiciel de TCAD
Nous prĂ©sentons le dĂ©veloppement dâun stage de CAO (Conception AssistĂ©e par Ordinateur) pour des Ă©tudiants de niveau bac+5 dĂ©couvrant le domaine de la microĂ©lectronique. Le but de ce stage est de dĂ©livrer dans un laps de temps relativement court (2 jours) les notions importantes sur la conception dâun circuit intĂ©grĂ© en technologie CMOS. Pour cela, le travail se base sur une dĂ©couverte du procĂ©dĂ© CMOS par la TCAD (Technology Computer Aided Design) permettant dâintroduire le procĂ©dĂ© de fabrication dâun MOSFET et de relier ses grandes Ă©tapes Ă la logique de dessin par couche lors de la conception du transistor (layout)
Vulnerability of optical detection systems to megajoule class laser radiative environment
International audienceThe Laser MegaJoule (LMJ) facility will host inertial confinement fusion experiments in order to achieve ignition by imploding a Deuterium-Tritium filled microballoon [1]. In this context an X-ray imaging system is necessary to diagnose the core size and the shape of the target in the 10-100 keV band. Such a diagnostic will be composed of two parts: an X-ray optical system and a detection assembly. The survivability of each element of this diagnostic has to be ensured within the mixed pulse consisting of X-rays, gamma rays and 14 MeV neutrons created by fusion reactions. The design of this diagnostic will take into account optics and detectors vulnerability to neutron yield of at least 1016. In this work, we will present the main results of our vulnerability studies and of our hardening-by-system and hardening-by- design studies
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