The ATLAS SCT grounding and shielding concept and implementation

R. L. Bates(University of Glasgow), P. J. Bell(University of Geneva), J. Bernabéu(Universitat de València), J.P. Bizzell(Rutherford Appleton Laboratory), J. Böhm(Czech Academy of Sciences), R. Brenner(Uppsala University), P. A. Bruckman de Renstrom(Institute of Nuclear Physics, Polish Academy of Sciences), A. Catinaccio(European Organization for Nuclear Research), V. Cindro(University of Ljubljana), A. Ciocio(Lawrence Berkeley National Laboratory), J.V. Civera(Universitat de València), S. Chouridou(University of California, Santa Cruz), P. Dervan(University of Liverpool), Brian Dick(The University of Melbourne), Z. Doležal(Charles University), L. Eklund(University of Geneva), L. Feld(RWTH Aachen University), D. Ferrère(University of Geneva), S. Gadomski(University of Geneva), Francisco M. González(Universitat de València), E. Górnicki(Institute of Nuclear Physics, Polish Academy of Sciences), A Greenhall(University of Liverpool), A. A. Grillo(University of California, Santa Cruz), J. Große-Knetter(University of Göttingen), M. Gruwé(European Organization for Nuclear Research), S. J. Haywood(Rutherford Appleton Laboratory), N. P. Hessey(National Institute for Subatomic Physics), Y. Ikegami(High Energy Accelerator Research Organization), T. J. Jones(University of Liverpool), J. Kaplon(European Organization for Nuclear Research), P Kodys(Charles University), T. Kohriki(High Energy Accelerator Research Organization), T. Kondo(High Energy Accelerator Research Organization), S. Koperny(AGH University of Krakow), C. Lacasta(Universitat de València), J. J. Lozano Bahilo(Universidad de Granada), Pa. Malecki(Institute of Nuclear Physics, Polish Academy of Sciences), F. Martinez-Mckinney(University of California, Santa Cruz), S. J. McMahon(Rutherford Appleton Laboratory), R. A. McPherson(European Organization for Nuclear Research), B. Mikulec(European Organization for Nuclear Research), M. Mikuž(University of Ljubljana), G. F. Moorhead(The University of Melbourne), M. Morrissey(Rutherford Appleton Laboratory), Y. Nagai(University of Tsukuba), A. Nichols(Rutherford Appleton Laboratory), V. OʼShea(University of Glasgow), J. R. Pater(University of Manchester), S. J. M. Peeters(University of Sussex), H. Pernegger(European Organization for Nuclear Research), E. Perrin(University of Geneva), P. W. Phillips(Rutherford Appleton Laboratory), J P Pieron(University of Wisconsin–Madison), S. Roe(European Organization for Nuclear Research), J. Sánchez(Universitat de València), E. Spencer(University of California, Santa Cruz), J. Šťastný(Czech Academy of Sciences), J. Tarrant(Rutherford Appleton Laboratory), S. Terada(High Energy Accelerator Research Organization), M. Tyndel(Rutherford Appleton Laboratory), Y. Unno(High Energy Accelerator Research Organization), R. Wallny(University of California, Los Angeles), M. Weber(Karlsruhe Institute of Technology), A. R. Weidberg(University of Oxford), P. S. Wells(European Organization for Nuclear Research), P. Werneke(National Institute for Subatomic Physics), I. Wilmut(Rutherford Appleton Laboratory)
Journal of Instrumentation
March 13, 2012
10.1088/1748-0221/7/03/p03005
Cited by 7Open Access
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Abstract

This paper describes the design and implementation of the grounding and shielding system for the ATLAS SemiConductor Tracker (SCT). The mitigation of electromagnetic interference and noise pickup through power lines is the critical design goal as they have the potential to jeopardize the electrical performance. We accomplish this by adhering to the ATLAS grounding rules, by avoiding ground loops and isolating the different subdetectors. Noise sources are identified and design rules to protect the SCT against them are described. A rigorous implementation of the design was crucial to achieve the required performance. This paper highlights the location, connection and assembly of the different components that affect the grounding and shielding system: cables, filters, cooling pipes, shielding enclosure, power supplies and others. Special care is taken with the electrical properties of materials and joints. The monitoring of the grounding system during the installation period is also discussed. Finally, after connecting more than four thousand SCT modules to all of their services, electrical, mechanical and thermal within the wider ATLAS experimental environment, dedicated tests show that noise pickup is minimised. © 2012 IOP Publishing Ltd and Sissa Medialab srl.

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