1 / 38

唐泽波 中国科学技术大学近代物理系

飞行时间计数器 TOF 的 刻度，性能和升级. 唐泽波 中国科学技术大学近代物理系. Timing Resolution before Calibration. Resolution = 124 ps Calibration is necessary. 时间测量过程. pulse. gate /start. 甄别. TDC. stop. TDC 微分非线性 (DNL). Counts. TDC. TDC 积分非线性 (INL). INL=TDC-i. TDC. INL 修正. 0.9. 2.7. dE/dx (KeV/cm).

marek
Télécharger la présentation

唐泽波 中国科学技术大学近代物理系

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. 飞行时间计数器 TOF的 刻度，性能和升级 唐泽波 中国科学技术大学近代物理系 Zebo Tang, 高能核物理导论

  2. Timing Resolution before Calibration Resolution = 124 ps Calibration is necessary Zebo Tang, 高能核物理导论

  3. 时间测量过程 pulse gate /start 甄别 TDC stop Zebo Tang, 高能核物理导论

  4. TDC 微分非线性(DNL) Counts TDC Zebo Tang, 高能核物理导论

  5. TDC 积分非线性(INL) INL=TDC-i TDC Zebo Tang, 高能核物理导论

  6. INL 修正 0.9 2.7 Zebo Tang, 高能核物理导论

  7. dE/dx (KeV/cm) Momentum p (GeV/c) pion 样本选择 Track length L, momentum p and mass m  TOFexpected Compare to TOFmeasured TOFmeasured- TOFexpected ~0 for pion Zebo Tang, 高能核物理导论

  8. T0 修正 不同的信号传播时间 不同的延迟电缆 。。。 Zebo Tang, 高能核物理导论

  9. Counts TOFmeasured – TOFexpected (ns) T0 修正 高斯函数拟合 将 TOFmeasured – TOFexpected的平均值平移到零 Zebo Tang, 高能核物理导论

  10. T1 T2 时幅（T-A）修正 t 幅度越小，时间越大 Zebo Tang, 高能核物理导论

  11. T-A 关系 Zebo Tang, 高能核物理导论

  12. beam Scan area Signal output 击中位置修正 ~6 cm 光传播1cm需要的时间？ 信号在读出条上的传播速度? Zebo Tang, 高能核物理导论

  13. T-Z关系 propagation speed：~45ps/cm Zebo Tang, 高能核物理导论

  14. 2005 Cu+Cu, 62 GeV 2005 Cu+Cu, 200 GeV 2008 p+p, 200 GeV 2009 p+p, 500 GeV TOF Timing Resolution Zebo Tang, 高能核物理导论

  15. TOF Time Resolution Summary Zebo Tang, 高能核物理导论

  16. Hadron PID TPC alone: /k ~0.7 GeV/c, (,k)/p ~1.1 GeV/c TPC p K π TOF e TOF alone:  /k ~1.6 GeV/c, (,k)/p ~ 3.0 GeV/c STAR Collaboration, PLB 616 (2005) 8 Zebo Tang, 高能核物理导论

  17. Au+Au TPC only p+p With ONE TOF Prototype STAR, PLB 616, 8 (2005); PRL 97, 152301 (2006) Light hadron with TOF STAR PRL92,112301 (2004) Zebo Tang, 高能核物理导论

  18. |1/β-1|<0.03 Electron and muon ID Electron: pT>0.2 GeV/c Muon: pT<0.25 GeV/c STAR, PRL 94, 062301, (2005) arXiv: 0805.0364 Zebo Tang, 高能核物理导论

  19. Heavy Flavor with TOF D0Kp m e arXiv: 0805.0364 Very helpful for open charm and hidden charm physics Zebo Tang, 高能核物理导论

  20. Light Nuclei with TOF Haidong Liu (STAR Collaboration), JPG 34, S1087 (2006), QM2006 Zebo Tang, 高能核物理导论

  21. Resonance with TOF Au+Au 200GeV Only one TOF track Enhanced by a factor of ~4 Yichun Xu et al., NIM A596, 186 (2008) Enhanced by a factor of ~2 Yichun Xu Zebo Tang, 高能核物理导论

  22. Resonance with two TOF tracks Yanfei Shen S/B: K* ~0.12 f: ~3.2 500 GeV p+p ~75% TOF installed ~2 M events for these plots TPC not well calibrated Zebo Tang, 高能核物理导论

  23. (DhxDf=0.05x0.05) ~5X0 对STAR基于EMC的trigger能力的改善 High Tower trigger: ET> a few GeV Quarkonium trigger: J/y,  Zebo Tang, 高能核物理导论

  24. TOF Match Rejection Power L2  triggered events Lucas M. Lima Zebo Tang, 高能核物理导论

  25. Upgrades Zebo Tang, 高能核物理导论

  26. STAR Muon Telescope Detector (MTD) Lijuan Ruan Detection efficiency muon pion pT (GeV) • A pseudo detector with scintillator covering the whole iron bars and left the gaps in-between uncovered. • muon efficiency: 35-45%, pion efficiency: 0.5-1% • muon-to-pion enhancement factor: 50-100 • muon-to-hadron enhancement factor: 100-1000 including track matching, tof and dE/dx • dimuon trigger enhancement factor from online trigger: 10-50 (Guoji Lin, DNP06) This together with DAQ1000 will greatly enhance our capability of J/ and other dilepton program in RHIC II and future QCD Lab Zebo Tang, 高能核物理导论

  27. 95 cm 25 cm Long-strip MRPC R&D LMRPC Pad size of STAR TOF 2.5 cm Large coverage Low costs on electronics Zebo Tang, 高能核物理导论

  28. Beam Test Results Yongjie Sun et al., NIM, A593, 307 (2008) Time resolution Plateau Efficiency Plateau At E~100 kV/cm (HV=±6300 V): Efficiency ~98% Resolution <70 ps Zebo Tang, 高能核物理导论

  29. Beam Test Results Yongjie Sun et al., NIM, A593, 307 (2008) • Signal propagation velocity: ~ 60ps/cm • The time difference: s(T) ~55ps • Position resolution: ~ 1 cm Position calculated from timing on two ends USTC module, HV=6300V, run30-33 Zebo Tang, 高能核物理导论

  30. CBM TOF Wall 中间： 高技术率MRPC 外围：长读出条MRPC Zebo Tang, 高能核物理导论

  31. Efficiency and resolution plateau 97% 65 ps Zebo Tang, 高能核物理导论

  32. Hit at the middle of the pad: <Cross talk> at neighbor pads: 2% Cross Talk Trigger Area: 1 cm wide <Cross talk> at next-to-neighbor pads: ~1% Zebo Tang, 高能核物理导论

  33. +HV E1 E -HV High counting rate MRPC Yi Wang Zebo Tang, 高能核物理导论

  34. BESIII High Resolution MRPC R&D Cheng Li Zebo Tang, 高能核物理导论

  35. Beam Test Results of a 24-gaps MRPC ~21 ps Shaohui An et al., NIM A594, 39-43 (2006) Zebo Tang, 高能核物理导论

  36. Compton or photoelectric interaction e-  .... ASmallAnimal PET with (M)RPCs The scanner The detection • Modules of n-stacked timing RPCs. • High acceptancegeometry > 90%. • Fully 3D measurement of the interaction point of the photon. No parallax error. • Very high spatial resolution < 0.5 mm (FWHM). • High timing resolution < 1 ns, improve the random events rejection. • Efficiency  10% (sensitivity  6 cps/KBq). • Low cost vs. scintillator based implementations. • Compatible with Magnetic Resonance Imaging. Incident photon Gas gap Alberto Blanco Zebo Tang, 高能核物理导论 4

  37. Summary • TOF 刻度：HPTDC INL, T0, 时幅修正，位置修正 • STAR-TOF大大提高了稳定带电强子，电子，低动量muon, 共振态粒子等的鉴别水平 • 基于MRPC技术的各种探测器在蓬勃发展 Zebo Tang, 高能核物理导论

  38. Home work • STAR-TOF的安装对D0的重建是否有很大的帮助？如果有的话，在那些方面? 对KS和L呢？ Zebo Tang, 高能核物理导论

More Related