1 / 18

T he ALICE Transition Radiation Detector (TRD) Read-Out Electronics

T he ALICE Transition Radiation Detector (TRD) Read-Out Electronics. J. Mercado Physikalisches Institut Universit ä t Heidelberg. Outline: The ALICE experiment The ALICE Transition Radiation Detector (TRD) The TRD Front-End Electronics (FEE) Integration, tests and measurements.

gizela
Download Presentation

T he ALICE Transition Radiation Detector (TRD) Read-Out Electronics

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. The ALICE Transition Radiation Detector (TRD) Read-Out Electronics J. MercadoPhysikalisches InstitutUniversität Heidelberg • Outline: • The ALICE experiment • The ALICE Transition Radiation Detector (TRD) • The TRD Front-End Electronics (FEE) • Integration, tests and measurements Jorge Mercado - I3HP Topical Workshop - St. Andrews

  2. The ALICE experiment ALarge Ion Collider Experiment (ALICE) at the LHC at CERN • Chief goal: • Quark-Gluon Plasma, QGP • Large Hadron Collider: • Pb+Pb at 5.5A TeV • LHC HI physics program: • 2 - 3 years Pb+Pb • L~ 1027 cm-2 s-1 • 1 year p+Pb ‘like’ • L ~ 1029 cm-2 s-1 • 1 year light ions (Ar+Ar) • 1027 < L < 1029 [cm-2 s-1] • p+p run at 14 TeV • 1029 < L < 3×1030 [cm-2 s-1] Jorge Mercado - I3HP Topical Workshop - St. Andrews

  3. The ALICE experiment HMPID PID (RICH) @ high pt PMD g multiplicity TPC Tracking, dE/dx MUON m-pairs TOF PID TRD Electron ID PHOS g,p0 ITS Low pt tracking Vertexing Jorge Mercado - I3HP Topical Workshop - St. Andrews

  4. Transition Radiation Detector (TRD) • Purpose: • Electron ID in the central barrel at p > 2 GeV/c • Fast (6 μs) trigger for high-pt particles (pt > 3 GeV/c) • Parameters: • 540 modules → 767 m2 area • 6 layers, 5 longitudinal stacks • Length: 7 m, weight: ~21 tons. • 28 m3 Xe/CO2 (85:15) • 1.2 million analog channels • 15 TB/s on-detector bandwidth Jorge Mercado - I3HP Topical Workshop - St. Andrews

  5. Working principle of the TRD • Transition Radiation (TR) is emitted whenever a charged particle crosses an interface between two media with different dielectric functions. • TR photons (< 30 keV for e-) are absorbed by a heavy gas mixture (Xe,CO2). Jorge Mercado - I3HP Topical Workshop - St. Andrews

  6. TRD signals: electrons, pions Test beam response of TRD for charged pions and electrons. For electrons, larger dE/dx with characteristic TR energy deposit. Jorge Mercado - I3HP Topical Workshop - St. Andrews

  7. The TRD readout chamber design Pad plane HEXCELL/CF Amplification region Drift region Radiator • 16 different types (sizes) • Production sites: Bucharest, Dubna, Frank furt, GSI, Heidelberg. • Standardized assembly procedure in Heidelberg. B. Windelband, Uni-HD Jorge Mercado - I3HP Topical Workshop - St. Andrews

  8. The TRD supermodule •30 (6 × 5) chambers are arranged in the so-called supermodule (18 in total). Right: setup at Heidelberg for testing de- formations under different orientations. •Length: 7 m, weight: 300 kg. Left: supermodule insertion in the ALICE space frame (lifting device already ordered). Jorge Mercado - I3HP Topical Workshop - St. Andrews

  9. The TRD Front-End Electronics Jorge Mercado - I3HP Topical Workshop - St. Andrews

  10. The TRD electronics chain charge ADC dig . filter fit tracklets Readout Merge tracklets sensitive 10 Bits ( pedestal, @L1A tree into tracks preamplifier 10 MHz tail corr) compress & 270 GB/sec Compute RoI Shaper preprocess ship RAW Ship RAW data data data @L2A •Custom preamplifier and shaper (PASA) analog IC (CMOS 0.35 μm). •Custom 10-Bit, 10 MSPS ADC designed in the UMC 0.18 μm process. • Custom MIMD Tracklet Processor (TRAP) implementing 4 RISC CPUs. L1 trigger Multi-Chip Module (MCM) to CTP Tracklet Tracklet Tracklet To HLT TRD PASA ADC Preprocessor Processor Merger GTU & DAQ TPP TP TM event buffer L1A Store RAW data until detector 6 layers 1200000 Channels 18 + 3 Channels Jorge Mercado - I3HP Topical Workshop - St. Andrews

  11. Multi-Chip Module (MCM) 4 cm Jorge Mercado - I3HP Topical Workshop - St. Andrews

  12. Time budget Jorge Mercado - I3HP Topical Workshop - St. Andrews

  13. Detector Control System (DCS) DCS will control and operate the whole experiment during all modes of operation DCS board overview: •Altera FPGA (100k gates) •Ethernet physical layer chip • 32 MByte SDRAM • 4 MByte flash EPROM •TTCrx clock recovery •3.3 and 1.8 voltage regs. •RS422 JTAG driver •LVDS Clk and trigger driver •16 bit ADC (10 SPS) Jorge Mercado - I3HP Topical Workshop - St. Andrews

  14. Detector Control System (DCS) DCS status: •Prototype finished (submitted) •Extended radiation tests • Communication via Ethernet in B-field tested • TRAP chips fully configured through DCS board Jorge Mercado - I3HP Topical Workshop - St. Andrews

  15. TRD electronics integration setup MCMs Readout Board Readout Chamber Jorge Mercado - I3HP Topical Workshop - St. Andrews

  16. Pedestal and noise measurements Jorge Mercado - I3HP Topical Workshop - St. Andrews

  17. Outlook & test beam plans • Outlook: • Chamber production underway at several production sites. • Supermodule and services infrastructure well under way. • PASA: ready, TRAP3: ready, final MCM: in production. • Final Readout Boards: in production. • Test beam plans at CERN: • From Oct. 11th until Nov. 5th, 2004 (e-,π up to 10 GeV/c at T9 site). • Full stack test (6 chambers): • Chambers, final electronics, DCS and, possibly, DATE. • Verifying all possible detector orientations. • Calibration data set for e-,π –separation. • Further TR measurements. Jorge Mercado - I3HP Topical Workshop - St. Andrews

  18. Thank You Jorge Mercado - I3HP Topical Workshop - St. Andrews

More Related