The ATLAS semiconductor tracker end-cap module

Article Article scientifique Article The ATLAS semiconductor tracker end-cap module eng 2007 collaborator Clark Allan Geoffrey 24043 collaborator Donega Mauro 527513 collaborator D'Onofrio Monica 134190 collaborator Ferrere Didier 507742 collaborator Iglesias Garcia Miguel Angel 134688 collaborator Macina-Buono Daniela 502380 collaborator Mangin-Brinet Mariane 543066 collaborator Mikulec Bettina 550867 collaborator Moed Shulamit 561377 collaborator Pelleriti Gabriel 134692 collaborator Perrin Eric 25916 collaborator Robichaud-Veronneau Andrée 636055 collaborator Sfyrla Anna 584693 collaborator Vu Anh Tuan 630321 collaborator Weber Maarten 22575 collaborator Willenbrock Manfred 25928 collaborator Wu Xin 27612 ATLAS Semiconductor Tracker Collaboration 353-389 10.1016/j.nima.2007.02.019 0168-9002 http://www.sciencedirect.com/science/article/pii/S0168900207003270 The challenges for the tracking detector systems at the LHC are unprecedented in terms of the number of channels, the required read-out speed and the expected radiation levels. The ATLAS Semiconductor Tracker (SCT) end-caps have a total of about 3 million electronics channels each reading out every 25 ns into its own on-chip View the MathML source3.3μs buffer. The highest anticipated dose after 10 years operation is 1.4×1014cm-2 in units of 1 MeV neutron equivalent (assuming the damage factors scale with the non-ionising energy loss). The forward tracker has 1976 double-sided modules, mostly of area ~70cm2, each having 2×768 strips read out by six ASICs per side. The requirement to achieve an average perpendicular radiation length of 1.5% X0, while coping with up to 7 W dissipation per module (after irradiation), leads to stringent constraints on the thermal design. The additional requirement of 1500e-1500e- equivalent noise charge (ENC) rising to only 1800e-1800e- ENC after irradiation, provides stringent design constraints on both the high-density Cu/Polyimide flex read-out circuit and the ABCD3TA read-out ASICs. Finally, the accuracy of module assembly must not compromise the 16μm(rφ) resolution perpendicular to the strip directions or View the MathML source580μm radial resolution coming from the 40 mrad front-back stereo angle. A total of 2210 modules were built to the tight tolerances and specifications required for the SCT. This was 234 more than the 1976 required and represents a yield of 93%. The component flow was at times tight, but the module production rate of 40–50 per week was maintained despite this. The distributed production was not found to be a major logistical problem and it allowed additional flexibility to take advantage of where the effort was available, including any spare capacity, for building the end-cap modules. The collaboration that produced the ATLAS SCT end-cap modules kept in close contact at all times so that the effects of shortages or stoppages at different sites could be rapidly resolved. Silicon Module Microstrip ATLAS SCT LHC Dewey 500.2 34 Département de physique nucléaire et corpusculaire 132 false Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment 575 3 12208c8a-771e-44c5-b628-054969aa3fcf Article (Published version) Restricted Clark222.pdf 5110711 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

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The ATLAS semiconductor tracker end-cap module	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment			2007	711	3

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Iglesias Garcia, Miguel Angel