1 / 5

13.5 mm

Highlights of the ALICE Silicon Pixel Detector. 13.5 mm. 15.8 mm. 5 Al layer bus + extender. 2 layer barrel Total surface: ~0.24m 2 Power consumption ~1.5kW Evaporative cooling C 4 F 10 Room temperature Material budget per layer ~1% X 0.

colin-neal
Download Presentation

13.5 mm

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Highlights of the ALICE Silicon Pixel Detector 13.5 mm 15.8 mm 5 Al layer bus + extender • 2 layer barrel • Total surface: ~0.24m2 • Power consumption ~1.5kW • Evaporative cooling C4F10 • Room temperature • Material budget per layer ~1% X0 MCM + extender + 3 fiber link Ladder 1 Ladder 2 MCM Grounding foil Half-stave Outer surface: 80 half-staves • ALICELHCb1 • readout chip • mixed signals • 8192 cells • 50x425mm2 ~1200 wire-bonds • Unique L0 trigger capability • Prompt FastOR signal in each chip • Extract and synchronize 1200 FastOR signals from the 120 half-staves • User defined programmable algorithms Inner surface: 40 half-staves

  2. SPD installed in ALICE in Jun‘07 Final checks (top-right), installation around the Be beam pipe (bottom-left) and last sight (bottom-right)

  3. Commissioning started-up in Dec ’07 • First cosmic event detected in the SPD on 21 Feb ’08 • SPD prompt trigger (≈800 ns latency) to ALICE L0 installed and commissioned in Apr ‘08 • Data taking for the inner alignment of the ITS modules and ITS vs TPC from May ’08, trigger provided by the SPD • SPD residual misalignment < 10 mm (detector position resolution 12 mm) Side view View along z Side view View along z SPD Online Event Display - Cosmic Run Self-triggered (FastOr) coincidence of top outer and bottom outer layer

  4. First sign of life in LHC seen by the ALICE SPD on 15 Jun ‘08 during a transfer line injection test - cover and LHC focus article in the Jul/Aug issue of the CERN Courier • SPD operational during the beam injection tests since Aug ‘08 in self-triggering mode - study of the LHC screen related background in ALICE • On 10 Sep ‘08 the SPD lights up with first beam in LHC Longitudinal tracks along up two ladders (14 cm)

  5. SPD ready to record the first collisions in LHC in Sep ’09. • «It's 9 a.m. and the Silicon Pixel Detector in ALICE • lights up with particle “debris“ created as beam in • the transfer line from the SPS hits the beam stop • before Point 2.» • From CERN Courier –Nov. ’08 – LHC focus: “LHC first beam: a day to remember” • First beam-induced interaction in LHC recorded by the ALICE Inner tracking System on 11 Sep ’08 - Beam 1 captured by RFs and circulating up to 30’ - SPD triggering - ITS standalone tracking, 7 track event

More Related