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Irradiation studies for the ATLAS inner detector opto-electronic readout system for SLHC

Proceedings - 11th Workshop on Electronics for LHC and Future Experiments, LECC 2005 (2005) 311-315

Authors:

C Issever, ML Chu, V Cindro, T Huffman, G Kramberger, I Mandic, PK Teng, AD Weidberg

Abstract:

We present measurements of the performance of Vertical Cavity Surface Emitting Lasers (VCSELs) after irradiating them up to 1.0E+16 n eq/cm2 and performance measurements of optical Step-Index-Multi-Mode (SIMM) fibres which were irradiated up to 140Mrad.

LHC final states and their potential experimental and theoretical accuracies

HERA and the LHC: A Workshop on the Implications of HERA for LHC Physics, HERA-LHC 2005 - Proceedings (2005) 46-77

Authors:

A Cooper-Sarkar, M Dittmar, GDC Gwenlan, H Stenzel, A Tricoli

Modeling free convection flow of liquid hydrogen within a cylindrical heat exchanger cooled to 14 K

Proceedings of the Twentieth International Cryogenic Engineering Conference, ICEC 20 (2005) 857-860

Authors:

SQ Yang, MA Green, W Lau

Abstract:

A liquid hydrogen in a absorber for muon cooling requires that up to 300 W be removed from 20 liters of liquid hydrogen. The wall of the container is a heat exchanger between the hydrogen and 14 K helium gas in channels within the wall. The warm liquid hydrogen is circulated down the cylindrical walls of the absorber by free convection. The flow of the hydrogen is studied using FEA methods for two cases and the heat transfer coefficient to the wall is calculated. The first case is when the wall is bare. The second case is when there is a duct some distance inside the cooled wall. Crown Copyright © 2005.
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Modeling the thermal mechanical behavior of a 300 K vacuum vessel that is cooled by liquid hydrogen in film boiling

Proceedings of the Twentieth International Cryogenic Engineering Conference, ICEC 20 (2005) 825-828

Authors:

SQ Yang, MA Green, W Lau

Abstract:

This report discusses the results from the rupture of a thin window that is part of a 20-liter liquid hydrogen vessel. This rupture will spill liquid hydrogen onto the walls and bottom of a 300 K cylindrical vacuum vessel. The spilled hydrogen goes into film boiling, which removes the thermal energy from the vacuum vessel wall. This report analyzes the transient heat transfer in the vessel and calculates the thermal deflection and stress that will result from the boiling liquid in contact with the vessel walls. This analysis was applied to aluminum and stainless steel vessels. Copyright © 2005. Published by Elsevier Ltd. All rights reserved.
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Search for chargino and neutralino associated production at the Tevatron

Proceedings of Science 21 (2005)

Abstract:

I present a review of the searches for charginos and neutralinos using data from proton-antiproton collision at the centre of mass energy of 1.96 TeV collected by the CDF and the D0 experiments at the Tevatron during run II.
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