Presentation is loading. Please wait.

Presentation is loading. Please wait.

Time of Flight Detectors at RHIC Time of Flight Measurements at RHIC  TOF detector as a PID devices  PHENIX-TOF and BRAHMS-TOF PHENIX Time-of-Flight.

Published byGeraldine McCormick Modified over 8 years ago

Similar presentations

Presentation on theme: "Time of Flight Detectors at RHIC Time of Flight Measurements at RHIC  TOF detector as a PID devices  PHENIX-TOF and BRAHMS-TOF PHENIX Time-of-Flight."— Presentation transcript:

1 Time of Flight Detectors at RHIC Time of Flight Measurements at RHIC  TOF detector as a PID devices  PHENIX-TOF and BRAHMS-TOF PHENIX Time-of-Flight Detector  Mechanical design and PID capability  Detector performance in year-1 operation Hadron PID by PHENIX-TOF Summary BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Tatsuya Chujo for the PHENIX Collaboration

2 Hadronic observables for QGP search 1.Identified single particle spectra and yields 2.Special and temporal evolution of the source, extrapolated by Hanbury-Brown Twiss effect (HBT) 3.Strangeness abundance 4.In-medium modification of  meson’s property ………… Time of Flight Measurements at RHIC BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Precise measurement of identified hadrons in wide p T range is required to understand the collision dynamics at RHIC Needed high timing resolution TOF detector at RHIC experiments

3 Why PID by TOF Is Important ? BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 TOF – TOF expected [ns] from T. Ullrich talk at DNP2000 PID by dE/dx in TPC (STAR) PID by TOF (WA98) Limitation of PID capability by dE/dx : p < 1 GeV/c  /K separation PID by TOF : Clear  /K/p separation at higher momentum. 1.0 GeV/c

4 TOF Detectors in HI Experiments BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 AGS-E802 (1987-1996) AGS-E866 (1993-1996) SPS-WA98 ARM II (1995-1996) PHENIX (2000-) TOF is considered as the most reliable and stable devices for charged particle identification.

5 Performance @ CERN WA98 Experiment Achieved timing resolution :  TOF = 85 ps Demonstrated clear  /K/p separation. Installed tested WA98-TOF counter in PHENIX. BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000  TOF = 85 ps TOF – TOF expected [ns] Selected high momentum pions TOF resolution PID performance

6 TOF Detectors at RHIC BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 TOF BBC (start timing) PHENIX Central Arm Detectors TOFW H2 H1

7 PHENIX-TOF vs. BRAHMS-TOF BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 * In this talk, only PHENIX-TOF detector are reviewed. PHENIXBRAHMS H1H2TOFW Acceptancemid-rapidity –0.35 <  < 0.35 forward rap. 1.2 <  < 3.5 forward rap. 2.0 <  < 3.5 mid rap. 0 <  < 1.2 Distance from vertex5m5m9 m20m4m4m 4   /K separation < 2.4 GeV/c < 3.3 GeV/c< 5.0 GeV/c< 2.2 GeV/c 4  K/p separation < 4.0 GeV/c < 5.7 GeV/c< 8.5 GeV/c< 3.7 GeV/c BRAHMS : Cherenkov counters are also used for hadron PID at high momentum PHENIX : Finely segmented high resolution TOF at mid-rapidty. BRAHMS: Wide kinetic coverage, PID @ high momentum with Cherenkov counter.

8 PHENIX-TOF Basic Design BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Acceptance : driven by HBT and  meson  = 40 deg. (  = 0.7),  = 45 deg. Timing Resolution : p T distribution more than 2 GeV/c and  meson measurement Segmentation : Keep the occupancy level < 10 % ~ 100 cm 2 /segment at 5 m from vertex  = 45 deg.,  = 0.7 4  /K separation at p = 2.4 GeV/c 4  K/p separation at  p = 4.0 GeV/c (@ flight path = 5m) Required  TOF < 80 ~ 100 ps for TOF

9 PHENIX-TOF Components 385cm 200cm BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Consists of 960 plastic scintillators PMT readout at both ends of scint. (1920 ch.) Scintillator: Bicron BC404 decay constant : 1.8 ns attenuation length : 160cm PMT : Hamamatsu R3478S Rise time : 1.3 ns Transit time : 14 + - 0.36 ns PMT 96 slats/panel 10 panels

10 Features of TOF Mechanical Design BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 1.Used Honeycomb Board for scint. stacking Rigid structure with mass-less in 2m x 0.5 m Carbon fiber sheet + “honeycomb” structure Uniform structure 2. Used prism light guide to reduce dead space PMT Scintillator slat Prism light guide

11 Front End Electronics (FEE) BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Custom-made chips of TVC+AMU and QVC+AMU Overall timing resolution of < 25 ps Use of Analogue Memory Unit (AMU) Programmable up to 4  sec delay w/o coaxial delay cables. FEE board (16 ch/board) QVC/AMU 12 bit ADC Format Buffer 12 bit ADCTVC/AMUDiscr. PMT Block Diagram of FEE TVC+AMU chip (4ch /chip) Discriminator Sub-board PMT input lemo 16 inputs for PMT signals per board, which are split for timing and charge measurements

12 Front End Electronics (cont.) Elimination of Cross Talk between adjacent channels Each channel consists of two independent ch. 1. Signal : connected to PMT 2. Reference: antenna for cross talk elimination No cross talk in differential output Channel 1 discriminator time Channel 2 ADC counts 2: Reference 1: Signal 1-2: Difference BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000

13 TEC/TOF Matching  TOF-TEC = 2cm Corresponding to the TOF resolution of 120 ps Consistent with TOF intrinsic timing resolution without slewing correction.  TOF-TEC ~ 2 cm Timing resolution will be improved by fine tuning of calibration parameters.  TOF ~ 80 ps BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 TEC: Time Expansion Chamber TOF

14 Global Track/TOF Association Select in 2  radius  y [cm]  z [cm]  y [cm] Association window size : dr = 5 cm (~ 2  of in y-z projection plane) *Clear correlation between global tracks and TOF hit positions are seen BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000

15 Hadron PID by PHENIX-TOF PHENIX Preliminary Proton K+K+ K-K- ++ -- p Clear hadron PID achieved Note: * No slewing correction * Applied track association cut : dr = 5 cm * No acceptance/efficiency/decay corrections BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000 Proton K+K+ ++ (a.u.) PID cut PHENIX Preliminary m 2 [GeV/c 2 ] w/o PID cut e+ e+ e- e-

16 Summary Reviewed PHENIX-TOF detector functionality and performance from the first RHIC run. Tracking detectors (DC/PC/TEC) and TOF detector had been operated successfully during the run. TOF intrinsic timing resolution ~120 ps have been achieved by TEC/TOF hit position matching without slewing correction. Fine tuning of TOF timing calibration parameters will be done. Clear hadron PID have been achieved. Lots of interesting physics will come next. 1) Single particle spectra for  ,  , K +, K -, p and  p(, centrality dependence) 2) Particle ratio K/ ,  p/p etc. and their centrality/p T dependence 3) HBT analysis 4)  K + K - physics BNL/ Tatsuya CHUJO @ CAARI 2000 Univ. of North Texas, TX 11/1/2000

Download ppt "Time of Flight Detectors at RHIC Time of Flight Measurements at RHIC  TOF detector as a PID devices  PHENIX-TOF and BRAHMS-TOF PHENIX Time-of-Flight."

Similar presentations

Test results and status on T0 T0: start counter for pp collisions ShinIchi Esumi Inst. of Physics, Univ. of Tsukuba test experiment at KEK-PS analysis.

Test results and status on T0 T0: start counter for pp collisions ShinIchi Esumi Inst. of Physics, Univ. of Tsukuba test experiment at KEK-PS analysis.
Quark Matter 2006 (2006.11.18) Excitation functions of baryon anomaly and freeze-out properties at RHIC-PHENIX Tatsuya Chujo (University of Tsukuba) for.

Quark Matter 2006 ( ) Excitation functions of baryon anomaly and freeze-out properties at RHIC-PHENIX Tatsuya Chujo (University of Tsukuba) for.
1 STAR TOF Calibration. 2 Detectors TPC(TPX) - tracking MRPC TOF (TOFr) – stop time measurement pVPD/upVPD - start time measurement Particle momentum;

1 STAR TOF Calibration. 2 Detectors TPC(TPX) - tracking MRPC TOF (TOFr) – stop time measurement pVPD/upVPD - start time measurement Particle momentum;
Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学.

Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学.
Results from PHENIX on deuteron and anti- deuteron production in Au+Au collisions at RHIC Joakim Nystrand University of Bergen for the PHENIX Collaboration.

Results from PHENIX on deuteron and anti- deuteron production in Au+Au collisions at RHIC Joakim Nystrand University of Bergen for the PHENIX Collaboration.
Bingchu Huang, USTC/BNL 1 Bingchu Huang (for STAR Collaboration) University of Science and Technology of China (USTC) Brookhaven National Laboratory (BNL)

Bingchu Huang, USTC/BNL 1 Bingchu Huang (for STAR Collaboration) University of Science and Technology of China (USTC) Brookhaven National Laboratory (BNL)
Design and First Results of a Cosmic Ray Telescope For Use In Testing a Focusing DIRC M. P. Belhorn University of Cincinnati The BELLE group at the University.

Design and First Results of a Cosmic Ray Telescope For Use In Testing a Focusing DIRC M. P. Belhorn University of Cincinnati The BELLE group at the University.
Particle Production in p + p Reactions at GeV K. Hagel Cyclotron Institute Texas A & M University for the BRAHMS Collaboration.

Particle Production in p + p Reactions at GeV K. Hagel Cyclotron Institute Texas A & M University for the BRAHMS Collaboration.
- RHIC, PHENIX PHENIX Pad Chambers - Net-Charge Fluctuations Predictions PHENIX Analysis Comparison to simulations O UTLINE.

- RHIC, PHENIX PHENIX Pad Chambers - Net-Charge Fluctuations Predictions PHENIX Analysis Comparison to simulations O UTLINE.
Timing Properties of T0 Detectors At PHOBOS Saba Zuberi, Erik Johnson, Nazim Khan, Frank Wolfs, Wojtek Skulski University of Rochester.

Timing Properties of T0 Detectors At PHOBOS Saba Zuberi, Erik Johnson, Nazim Khan, Frank Wolfs, Wojtek Skulski University of Rochester.
High p T identified hadron anisotropic flow and Deuteron production in 200 GeV Au+Au Collisions Shengli Huang Vanderbilt University for the PHENIX Collaboration.

High p T identified hadron anisotropic flow and Deuteron production in 200 GeV Au+Au Collisions Shengli Huang Vanderbilt University for the PHENIX Collaboration.
The Time-of-Flight system of the PAMELA experiment: in-flight performances. Rita Carbone INFN and University of Napoli RICAP ’07, Rome, 21-06-07.

The Time-of-Flight system of the PAMELA experiment: in-flight performances. Rita Carbone INFN and University of Napoli RICAP ’07, Rome,
High p T identified charged hadron v 2 and v 4 in 200GeV AuAu collisions by the PHENIX experiment Shengli Huang Vanderbilt University for the PHENIX Collaboration.

High p T identified charged hadron v 2 and v 4 in 200GeV AuAu collisions by the PHENIX experiment Shengli Huang Vanderbilt University for the PHENIX Collaboration.
The Transverse detector is made of an array of 256 scintillating fibers coupled to Avalanche PhotoDiodes (APD). The small size of the fibers (5X5mm) results.

The Transverse detector is made of an array of 256 scintillating fibers coupled to Avalanche PhotoDiodes (APD). The small size of the fibers (5X5mm) results.
Reaction Plane Detector Safety Review Abigail Bickley, for the RxnP Group University of Colorado June 22, 2006 All data sheets can be found at: https://www.phenix.bnl.gov/WWW/publish/bickleya/060622_RxnPSafety/

Reaction Plane Detector Safety Review Abigail Bickley, for the RxnP Group University of Colorado June 22, 2006 All data sheets can be found at:
Yuriy Riabov QM2006 Shanghai Nov.19, 2006 1 Measurement of the leptonic and hadronic decays of  and ω mesons at RHIC by PHENIX Yuriy Riabov for the Collaboration.

Yuriy Riabov QM2006 Shanghai Nov.19, Measurement of the leptonic and hadronic decays of  and ω mesons at RHIC by PHENIX Yuriy Riabov for the Collaboration.
QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.

QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.
Current Status of Hadron Analysis Introduction Hadron PID by PHENIX-TOF  Current status of charged hadron PID  CGL and track projection point on TOF.

Current Status of Hadron Analysis Introduction Hadron PID by PHENIX-TOF  Current status of charged hadron PID  CGL and track projection point on TOF.
Nov2,2001High P T Workshop, BNL Julia Velkovska High pt Hadrons from  sNN = 130 GeV Au-Au collisions measured in PHENIX Julia Velkovska (BNL) for PHENIX.

Nov2,2001High P T Workshop, BNL Julia Velkovska High pt Hadrons from  sNN = 130 GeV Au-Au collisions measured in PHENIX Julia Velkovska (BNL) for PHENIX.
QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.

QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.

Similar presentations

Ads by Google