The LHCb VELO Upgrade module construction
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Published:2024-06-01
Issue:06
Volume:19
Page:P06023
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ISSN:1748-0221
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Container-title:Journal of Instrumentation
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language:
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Short-container-title:J. Inst.
Author:
Akiba K.ORCID, Alexander M.ORCID, Bertella C.ORCID, Biolchini A.ORCID, Bitadze A.ORCID, Bogdanova G.ORCID, Borghi S.ORCID, Bowcock T.J.V.ORCID, Bridges K., Brock M., Burke A.T.ORCID, Buytaert J.ORCID, Byczynski W.ORCID, Carroll J., Coco V.ORCID, Collins P.ORCID, Davis A.ORCID, De Aguiar Francisco O.ORCID, De Bruyn K.ORCID, De Capua S.ORCID, De Roo K., Doherty F.ORCID, Douglas L., Dufour L.ORCID, Dumps R., Dutta D.ORCID, Eklund L.ORCID, Elvin A.ORCID, Farry S.ORCID, Fernandez Prieto A.ORCID, Franco Lima V.ORCID, Freestone J., Fuzipeg C.ORCID, Galati M.D.ORCID, Gallas Torreira A.ORCID, Geertsema R.E.ORCID, Gersabeck E.ORCID, Gersabeck M.ORCID, Grant F.ORCID, Halewood-leagas T.ORCID, Hennessy K.ORCID, Hulsbergen W.ORCID, Hutchcroft D.ORCID, Hynds D.ORCID, Jans E.ORCID, John D., John M.ORCID, Jurik N.ORCID, Ketel T.ORCID, Klaver S.ORCID, Kopciewicz P.ORCID, Kostiuk I.ORCID, Kraan M., Langstaff M.ORCID, Latham T.ORCID, Leflat A.ORCID, Lemos Cid E.ORCID, Lukashenko V.ORCID, Merk M.ORCID, Milovanovic M.ORCID, Monk M.ORCID, Murray D.ORCID, Nasteva I.ORCID, Oblakowska-Mucha A.ORCID, Pajero T.ORCID, Parkes C.ORCID, Pazos Alvarez A.ORCID, Perez Trigo E.ORCID, Perry M.ORCID, Reiss F.ORCID, Rinnert K.ORCID, Rodriguez Rodriguez E.ORCID, Rovekamp J., Sanders F., Scantlebury Smead L.G.ORCID, Schiller M.ORCID, Shears T.ORCID, Smith N.A.ORCID, Snoch A.ORCID, Švihra P.ORCID, Szumlak T.ORCID, van Beuzekom M.ORCID, van Overbeek M., Vazquez Regueiro P.ORCID, Volkov V.ORCID, Wormald M., Zunica G.ORCID
Abstract
Abstract
The LHCb detector has undergone a major upgrade for LHC
Run 3. This Upgrade I detector facilitates operation at higher
luminosity and utilises full-detector information at the LHC
collision rate, critically including the use of vertex
information. A new vertex locator system, the VELO Upgrade, has been
constructed. The core element of the new VELO are the double-sided
pixelated hybrid silicon detector modules which operate in vacuum
close to the LHC beam in a high radiation environment. The
construction and quality assurance tests of these modules are
described in this paper. The modules incorporate
200 μm thick, n-on-p silicon sensors bump-bonded to
130 nm technology ASICs. These are attached with high precision to
a silicon microchannel substrate that uses evaporative CO2
cooling. The ASICs are controlled and read out with flexible printed
circuits that are glued to the substrate and wire-bonded to the
chips. The mechanical support of the module is given by a carbon
fibre plate, two carbon fibre rods and an aluminium plate. The
sensor attachment was achieved with an average precision of
21 μm, more than 99.5% of all pixels are fully
functional, and a thermal figure of merit of
3 Kcm2W-1 was achieved. The production of the
modules was successfully completed in 2021, with the final assembly
and installation completed in time for data taking in 2022.
Reference31 articles.
1. The LHCb Upgrade I;LHCb Collaboration;JINST,2024 2. LHCb VELO Upgrade Technical Design Report;LHCb Collaboration,2013 3. LHCb VELO TDR: Vertex locator. Technical design report;LHCb Collaboration,2001 4. LHCb Trigger and Online Upgrade Technical Design Report,2014 5. VeloPix ASIC development for LHCb VELO upgrade;van Beuzekom;Nucl. Instrum. Meth. A,2013
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