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SUMMARY:The LHCb VELO detector: design\, operation and first results
DTSTART;VALUE=DATE-TIME:20230905T092000Z
DTEND;VALUE=DATE-TIME:20230905T094000Z
DTSTAMP;VALUE=DATE-TIME:20260913T135932Z
UID:indico-contribution-2968@indico.tlabs.ac.za
DESCRIPTION:Speakers: Edgar Lemos Cid (CERN)\nThe LHCb experiment has been
  upgraded during the second long shutdown\nof the Large Hadron Collider at
  CERN\, and the new detector is currently\noperating at the LHC. The Verte
 x Locator (VELO) is the detector\nsurrounding the interaction region of th
 e LHCb experiment\, responsible of\nreconstructing the proton-proton colli
 sion (primary vertices) as well as\nthe decay vertices of long-lived parti
 cles (secondary vertices).\nThe VELO is composed by 52 modules with hybrid
  pixel detector technology\,\noperating at just 5.1 mm from the beams. The
  sensors consist of\n200 $\\mu$m thick n-on-p planar silicon sensors\, rea
 d out via 3 VeloPix ASICs.\nThe sensors are attached to a 500 $\\mu$m thic
 k silicon plate\, which embeds\n19 micro-channels for the circulation of t
 he CO$_2$ evaporative cooling.\nThe VELO operates in an extreme environmen
 t\, which poses significant challenges\nto its operation. During the lifet
 ime of the detector\, the sensors are foreseen\nto accumulate an integrate
 d fluence of up to $8\\times10^{15}$ 1MeV n$_{\\rm eq}$cm$^{-2}$\,\nroughl
 y equivalent to a dose of 400 MRad. Moreover\, due to the geometry\nof the
  detector\, the sensors will face a highly non-uniform irradiation\,\nwith
  fluences in the hottest regions expected to vary by a factor 400 within t
 he same sensor.\nThe highest occupancy ASICs foresee a maximum pixel hit r
 ate of 900 Mhit/s and an output\ndata rate exceeding 15 Gbit/s. The design
 \, operation and early results obtained during\nthe first year of commissi
 oning will be presented.\n\nhttps://indico.tlabs.ac.za/event/112/contribut
 ions/2968/
LOCATION: Auditorium 2
URL:https://indico.tlabs.ac.za/event/112/contributions/2968/
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