1 / 18

Talk info

Talk info. Main focus Instrumentation talk on FVTX FVTX commissioning and analysis update in Run12/13 New functionality Relative Lumi monitor, reaction plane detector and trigger options Schedule Saturday, April 13, 2013, 2:42 PM–2:54 PM 10 page for 10 min talk

cate
Download Presentation

Talk info

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. Talk info Jin Huang <jhuang@bnl.gov> • Main focus • Instrumentation talk on FVTX • FVTX commissioning and analysis update in Run12/13 • New functionality • Relative Lumi monitor, reaction plane detector and trigger options • Schedule • Saturday, April 13, 2013, 2:42 PM–2:54 PM • 10 page for 10 min talk • Session C9: Ultrarelativistic Heavy Ions: Quarkonia, Heavy Flavor, Chair: Richard Seto • Related talks • Same session - Yaping Wang - Intermediate Silicon Tracker for STAR HFT Upgrade • Sunday -   Abraham Meles – FVTX for W • Sunday – Darshana Perera – FVTX for DY

  2. Recent Update for Forward Silicon Detector of the PHENIX Experiment Jin HuangLos Alamos National Lab For the PHENIX Collaboration

  3. Forward vertex detector (FVTX) = 1.2 VTX  = 2.4 FVTX (S) FVTX (N) VTX (DCA) Jin Huang <jhuang@bnl.gov> FVTX – forward silicon vertex detector with 1M strips along azimuthal direction, 75 μm pitch in R, 96 azimuthal seg. Differentiate primary vertex / secondary decay using DCA Precisely measure di-muon opening angle Joint tracking with Muon Tracker : suppress decay-in-flight and mis-reconstruction Track isolation : suppress hadrons from jet for W measurement New function development (Reaction plane, rel. lumi., triggers, …)

  4. FVTX Commissioning and operation FVTX → IR Run12 Run13 Jin Huang <jhuang@bnl.gov> Oct-Dec 2011 – Detector final assembly and test Quality check on all wedges Late Dec 2011 – First data from PHENIX IR Late Jan 2012 – First full detector readout from IR Feb 24 2012 – First physics data with 1/6 acceptance Mid March 2012 – Detector operational for p-p with ~90% of acceptance ONLogged all √S = 510 GeV p-p data Late March 2012 – Detector operation by shift workers Mid Apr 2012 – Commissioning for Heavy ion running End May 2012 – Production for √SNN = 200 GeV Cu+AuLogged all Cu+Au physics data Early Mar 2013– Physics production for 510GeV p+p Mid Mar 2013–New in production: rel. lumi monitoring

  5. Recent software development FVTX FVTX FVTX-VTX Event Display510 GeV p-p VTX VTX Clusters FVTX Event Display200 GeV U-U One of two arms shown FVTX-VTX Track Further matching to Muon Tracker Plot by Aaron Key (UNM) Jin Huang <jhuang@bnl.gov> • Hough transformation based tracking • Compare with progressive tracking, improved tracking speed by 20x for heavy ion analysis • <1s per CuAu central event • Multi-vertex finder which cover full PHENIX vertex range • Tracklet-based isolation cone cuts: extract DY and W signal in pp

  6. Detector alignment Align Station Align Wedges Residual (μm) FVTX sectors Δφ~7.5º per sector Jin Huang <jhuang@bnl.gov> Run13: FVTX self-alignment finished within few day of data taking Based the MELLEPED-II packet (refit 1M track and FVTX geometry simultaneously) Using a φ-constraint fit designed for alignment purpose First align stations then wedges Overall deviation from ideal ≲100 um

  7. Recent Analysis 1 – DCA measurement Run12 √S = 510 GeV p-p Data DCAR (cm) Jin Huang <jhuang@bnl.gov> DCA provide powerful tool to separate prompt and heavy flavor component of charged particle production Illustrated σ~350um DCA resolution for Run12 √S = 510 GeV p-p Data Will be improved after evolving of vertex finding (software improvement, or in heavy ion collision)

  8. Recent Analysis 2 improved dimuon measurement μ+ μ- Muon tracks through ~1m of iron Dimuon spectrum of Run13 510 p-p data A. U. South arm Like-sign subtracted • PHENIX muon track reconstructed after hadron absorber (1.1m Fe+0.2m Cu) • Track angle smeared due to multiple scattering • δθRMS ≈ 20mrad @ 10 GeV/c • FVTX contributes tracklet before the absorber • Precisely determine the of dimuon opening angle • Significantly improved invariant mass resolution Plot by Matt Durham (LANL) μ+μ- Invariant Mass (GeV)

  9. Reaction plane detection Run12 Data Cu+Au √SNN = 200 GeV Plot by Shengli Huang (Vanderbilt U.) • Reaction plane in heavy ion collision • Important for studying the collective geometry of participating nucleons • Defined by beam direction and impact distance • Measured by azimuthal asymmetry of particle production • FVTX for RP measurement • Full azimuthal coverage and 96 azimuthal segments • Unique eta range in PHENIX RP measurement • High channel segmentation and statistics • Factor of two improvement w.r.t. BBC observed

  10. New functionality allowed by DAQ design Exp Hall DAQ Room Hit Driven Interface 17k LVDS 3.2 Tb/s 768 fibers 1.9 Tb/s Readout Chip Sensor Hit Driven 24 Readout cards 384 Silicon Detectors 1M channel 48 Front End Modules Jin Huang <jhuang@bnl.gov> FVTX DAQ design : all hit info stream to DAQ room, which allow building new functionalities based on this rich information FVTX Trigger (proposed): trigger on high multiplicity events or tracks using FPGA-based lookup tables, to filter rare events Measure bunch-bunch relative luminosity (implemented, next page)

  11. New functionality – Relative Luminosity Monitor for high precision spin asymmetry measurement RHIC abort gap RHIC abort gap Empty bunches Run13 √S = 510 GeV p-p Data Hit-scaled scalars Run13 √S = 510 GeV p-p Data Two station coincidental scalars • Relative lumi important for PHENIX forward spin program. High statistic precision in run13 (10-4) call for new method to cross check and confirm measurement (BBC & ZDC) • FPGA-based scalar implemented to count FVTX hits without prescale • Very high statistics (δAStat<10-4 per 1hour run) • Proportional to luminosity in each beam bucket (120 in RHIC) • 192 segmentation in scalar configuration and two flavors of scaling to provide systematics check Plot by Aaron Key (UNM)

  12. Conclusion Jin Huang <jhuang@bnl.gov> • Forward Silicon Detector (FVTX) provide new detection capability for the PHENIX experiment • Including Vertex finding/DCA/joint tracking/opening angle/Background rejection • Successfully commissioned at early part of the 2012 run • Production data on tape • Run12 √S = 510 GeV p-p • Run12 √SNN = 200 GeV Cu+Au • Run13 √S = 510 GeV p-p on-going as we speak • Analysis on-going, stay tuned for physics results • Physics progress update : Session L9 Abraham Meles (pp→W) and Darshana Perera (pp→γ* →μ+μ-) • New capability implemented or coming • Reaction plane, relative lumi, trigger

  13. Backup Jin Huang <jhuang@bnl.gov>

  14. Scalar reading for run 387292 Jin Huang <jhuang@bnl.gov>

  15. DY longitudinal DSA (ALL) Run12+13 projection Δ u / u ~0.2 for our x1~0.06 HERMES and JLab data Jin Huang <jhuang@bnl.gov> Drell-Yan ALL can cleanly access Δ ū / ū Compared with RHIC-W, access smaller x2 Comparing with previous measurement (DIS), no fragmentation process is involved, high Q2 provides unique check on global fits

  16. lepton lepton proton μ- μ+ pion proton DY Transverse SSA (AN) 3-year running projection proton Semi-inclusive DIS (SIDIS) Drell-Yan Courtesy to M. Burkardt Jin Huang <jhuang@bnl.gov> DY SSA (AN) gives access to quark Sivers effect (f1T⊥) in proton Good handle on background f1T⊥ expected to reverse in sign from SIDIS to DY measurementAn important test for TMD framework

  17. J/Ψ Drell Yan ϒ-states beauty charm Measuring forward di-muon pairs p-p √s = 510 GeV Run12 data J/Ψ Low-mass DY High-mass DY S/B contributionsw/o vertex detector High-mass DY Low-mass DY Ψ’ Invariant mass (GeV) Jin Huang <jhuang@bnl.gov> • Signal divided into three regions • High-mass DY • 4 GeV < M < 8 GeV • Dominated by beauty decay background if w/o FVTX • J/Ψ • Mass resolution ~ 150 MeV • Relatively clean signal ~10:1 s/b • Low-mass DY • M < 2.5 GeV • Dominated by combinatorial and charm background if w/o FVTX

  18. Drell Yan Charm (much lower yield) beauty combinatorial background Extracting DY signal with FVTX-DCA cuts (DCA) DCA < 1 σ cut: Increase DY/bgd~ 5:1 Jin Huang <jhuang@bnl.gov> DCA cuts improve DY signal-to-background (dominated by beauty) ratio from 1:1 to 5:1 for high mass region Expect first polarized DY measurement! Studies on low-mass DY also suggest promising signal More discussion on FVTX-DCA: J. Bok’s talk – Instrumentation VI

More Related