1 / 14

The LHCb Hadron Calorimeter Rustem Dzhelyadin, (IHEP, Protvino)

The LHCb Hadron Calorimeter Rustem Dzhelyadin, (IHEP, Protvino). Contents: Design overview Trigger with HCAL Internal structure Iron plates production Scintillating tiles Fiber routing Module-0 assembly Calibration with 137 Cs

telyn
Télécharger la présentation

The LHCb Hadron Calorimeter Rustem Dzhelyadin, (IHEP, Protvino)

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 LHCb Hadron Calorimeter Rustem Dzhelyadin, (IHEP, Protvino) • Contents: • Design overview • Trigger with HCAL • Internal structure • Iron plates production • Scintillating tiles • Fiber routing • Module-0 assembly • Calibration with 137Cs • Beam-test • Summary INSTR02 Conference, BNPI, Novosibirsk, Russia

  2. The LHCb Hadron Calorimeter design overview • two separate movable halves: • stack of 26 modules in each half • 5.6  instrumented depth • 4.2(w) x 0.26(h) x 1.66(l) m • module weight 9.5 ton • read-out electronics on detector INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  3. The LHCb Hadron Calorimeter trigger on high Pt hadron INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  4. The LHCb Hadron Calorimeter internal structure • Sampling iron/scintillator: 5.58:1 • master plate 6 mm thick • spacer plate 4 mm thick • scintillator tile 3 mm thick • Natural iron path: • 1cm lateral ~ 1 X0 • 20 cm longitudinal ~ 1 I • Mechanical advantages: • self supporting, rigid • same iron design both for • full size cell and • half size cell • Easy in construction: • punching technology (iron plates) • casting in mold (scintillator tiles) INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  5. The LHCb Hadron Calorimeter iron plates production • Three technologies tested: • milling - easy to start, but production rate and cost/quality problem • laser cut - low cost, productive, but tolerance problem • punching - good for mass production, but die construction needed Module-0 parts (milled iron) Masters under test (laser cut) INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  6. The LHCb Hadron Calorimeter iron plates production (cont.) Die data: - weight 5.3 ton - contour circumference ~3 m - positioning accuracy 0.05 mm - dimension tolerance 0.10 mm - production rate 50 pc/h guide pins guide pins Key dimension measured as 80.02 Die for masters punching INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  7. The LHCb Hadron Calorimeter iron plates production (cont.) Die data (for spacer #5): - weight 1.5 ton - contour ~93 cm - accuracy 0.05 mm - tolerance 0.10 mm - prod. rate 40 pc/h Spacer punching in progress Spacers #5 just after punch INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  8. The LHCb Hadron Calorimeter scintillator tiles Tile dimension: 197 x 256 x 3 mm3 - full size tile 197 x 127 x 3 mm3 - half size tile All wrapped in TYVEK envelope Fiber fed at edges inside TYVEK Scintillating tiles produced by casting in mold INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  9. The LHCb Hadron Calorimeter scintillator tiles • Tile response scan with -source: • two-side fiber readout • wrapped in TYVEK • whole tile • half tile INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  10. The LHCb Hadron Calorimeter fiber routing Fiber cut tool • WLS fibers KURARAY • type Y-11MS(250) • Mirror at far end - • - aluminized • Two LED per module • for calibration: • timing (±0.5 ns) • short term stability • PMT linearity Diamond head INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  11. The LHCb Hadron Calorimeter module-0 assembly • Module-0 constructed in 2001: • iron - milled in Tula, Russia • assembled in IHEP workshop • delivered to CERN • Optics parts: • fiber aluminized at IHEP • tiles cast in Podolsk, Russia • assembled at CERN • PMT’s: • 24 FEU-115m10 from MELZ • 16 HM7899-01, HAMAMATSU • Two fast LED with drivers installed • Electronics for DC current measurement • (induced by 137Cs radioactive source) INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  12. The LHCb Hadron Calorimeter calibration with 137Cs radioactive source • 3 miniature 137Cs -source manufactured at JINR, Dubna: • 5 mCu, 8 mCu, 10 mCu • Allow measure any tile and fiber response: • continuous pipe-line through all modules • hydraulic pump-valve driver • garage for source housing • Readout electronics: • DC integrator ( = 2 ms) • 12 bit ADC (5 ms/module) • CAN-PCI (1 Mb/s) • Software: • CAN Open protocol drivers • Visualization - monitoring • SCADA control INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  13. The LHCb Hadron Calorimeter beam-tests Module-0 on X7 beam-line at CERN SPS INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

  14. The LHCb Hadron Calorimeter Summary • Design goal - simple detector easy to construct • Allow essentially improve sensitivity to hadronic final states of B-decay • Productive and low cost technology available: casting and punching • Module-0 has been constructed show feasibility of design • Mass production started in 2002 INSTR02 Conference, BNPI, Novosibirsk, Russia 05.03.2002 Rustem Dzhelyadin(IHEP, Protvino)

More Related