1 / 18

A Silicon Vertex Tracker for

A Silicon Vertex Tracker for. Physics goal Structure of detector Status and plan Expected performance Summary. Atsushi Taketani. PHENIX Vertex Group ( 86 Participants from 15 institutions). M. Baker, R. Nouicer, R. Pak, A. Sukhanov, P. Steinberg, Z Chai

genna
Télécharger la présentation

A Silicon Vertex Tracker for

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. A Silicon Vertex Tracker for • Physics goal • Structure of detector • Status and plan • Expected performance • Summary Atsushi Taketani

  2. PHENIX Vertex Group (86 Participants from 15 institutions) M. Baker, R. Nouicer, R. Pak, A. Sukhanov, P. Steinberg, Z Chai Brookhaven National Laboratory, Chemistry Department Z. Li Brookhaven National Laboratory, Instrumentation Division J.S. Haggerty, J.T. Mitchell, C.L. Woody, E. O’Brien, D. Lynch Brookhaven National Laboratory, Physics Department A.D. Frawley Florida State University J. Crandall, J.C. Hill, J.G. Lajoie, C.A. Ogilvie, A. Lebedev, H. Pei, J. Rak, G.Skank, S. Skutnik, G. Sleege, G.Tuttle Iowa State University, Ames, M. Tanaka KEK N. Saito, M. Togawa, M. Wagner Kyoto University H.W. van Hecke, G.J. Kunde, D.M. Lee, M. J. Leitch, P.L. McGaughey, W.E. Sondheim Los Alamos National Laboratory T. Kawasaki, K. Fujiwara Niigata University T.C. Awes, M. Bobrek, C.L. Britton, W.L. Bryan, K.N. Castleberry, V. Cianciolo, Y.V. Efremenko, K.F. Read, D.O. Silvermyr, P.W. Stankus, A.L. Wintenberg, G.R. Young Oak Ridge National Laboratory Y. Akiba, J. Asai, H. En’yo, Y. Goto, J.M. Heuser, H. Kano, H. Ohnishi, V. Rykov, T. Tabaru, A. Taketani, K.Tanida, J. Tojo, Y. Onuki RIKEN S. Abeytunge, R. Averbeck, K. Boyle, A. Deshpande , A. Dion, A. Drees, T.K. Hemmick, B.V. Jacak, C. Pancake, V.S. Pantuev, D. Walker Stony Brook University B. Bassalleck, D.E. Fields, M. Malik, C. Hagemann University of New Mexico O. Drapier, F. Fleuret, M.Gonin, R. G. de Cassagnac, A. Romana E. Tujuba Eole Polytechnique K. Kruita, Y. Inoue Rikkyo Univesity

  3. Physics Goals Open up new horizon! Spin program • Investigating nucleon spin structure by polarized proton-proton collider to utilize quark/gluon as probe, instead of DIS lepton. • gluon polarization by using beauty / charm final state. • gluon polarization by using g + jet final state. • Flavor decomposition by using W->e channel. Heavy Ion program • Potential enhancement of charm production. • Open beauty production. • Flavor dependence of jet quenching and QCD energy loss. • Beauty and charm separation • Accurate charm reference for quarkonium. • Thermal dilepton radiation. • Upsilon spectroscopy, e+e- decay channel • g -Jet correlation

  4. Physics Goal Spin Program Heavy Ion Program b contribution ? Gluon Polarization V2 Pt [GeV] • Charm and bottom identification by displaced vertex • Jet identification with larger acceptance

  5. NSAC recommendationOctober 7, 2004 Within a constant level of effort budget, the Subcommittee recommends that certain essential investments be made. These include: • Construction of the PHENIX Silicon Vertex Tracker and the STAR Time-of-Flight Barrel; • Participation in the LHC Heavy-Ion program; • Investment in RHIC accelerator and detector R&D; • Construction of the EBIS; • Support at the present level for university and national laboratory research; • Provision for RHIC running time sufficient to preserve the integrity of the Heavy-Ion and Spin Physics programs.

  6. Si Vertex Tracker Current PHENIXPioneering High Energy Nuclear Interaction eXperiment PHENIX Detector 1 Central Arm e, g, Charged Hadrons detection |h|<0.35,Df=p 2, Muon Arm m detection 1.2<|h|<2.4,2p in f 3, Forward detectors Luminosity Monitoring Centrality Local polarimetery • Good particle identification (But no direct b/c identification) • High Rate and High Detector granularity. • Limited geometrical coverage (Not 2p in central region)

  7. Requirements for Vertex Tracker Physics side • High precision tracking for displaced vertex measurement. 40mm displaced vertex resolution, ct ~ 100mm(D), ~400mm(B) • Large coverage tracking capability with momentum resolution (|h|<1.2 , and full azimuthally with s/P ~ 5%P) • High charged particle density ‘dN/dh’ ~ 700 @h=0 • High Radiation Dose ~100KRad@10Years • High Luminosity @PP -> High rate readout • Low Material Budget <- avoid multiple scattering and photon conversion for electron measurement by outer detectors. Environment side

  8. Strip Pixel Poster by K.Fujiwara(#292) D.E.Field (#290) Poster by G.J.Kunde(#297) Structure • Barrel region • |h|<1.2, almost 2p in f • Pixel sensor at inner 2 layers • Strip sensors at outer 2 layers • Forward region • 1.2<|h|<2.7, 2p in f • 4 layers of mini strip • (50 x 2000 to 11000 mm) • Trigger capable R=10 and 14cm R=2.5 and 5cm

  9. Readout by ALICE_LHCB1 chip • Amp + Discriminator / channel • Bump bonded( 2 dim. Soldering) to each pixel • Running 10MHz clock ( RHIC 106nsec ) • Digital buffer for each channel > 4usec depth • Trigger capability > FAST OR logic for each crossing PIXEL (Sensor and Readout) Pixel size( x z）50 µm x 425 µm Sensor Thickness 200um r = 1.36cm, z = 1.28 cm 256 x 32 = 8192 channel / sensor 4 sensor / chip 4 chip / ladder Used at NA60 (Rad hard)

  10. Al-Kapton Bus readout to minimize material (120micron pitch ) 15μm PIXEL readout 15μm 15μm 15μm 15μm

  11. Pilot module 32 4x parallel readout 128bit width bus 256 PIXEL readout • Ver.1 is running. • Ver.2 will come in Summer • PHENIX Digital Pilot • ALICE chip is 32bit input/40MHz x 16bit output • New chip is 64bit input/40MHz x 32bit output 15μm 15μm 15μm 15μm

  12. Sensor elements: Two strip-pixel arrays on a single-sided wafer of 500 µm thickness, with 384 + 384 channels on 3 x 3 cm2 area. Initial design: “longitudinal” readout. Made by SINTEF Pixels: 80 µm 1 mm, projective readout via double metal XU/V “strips” of ~3 cm length. new design: “lateral” SVX4 readout. Made by Hamamatsu Strip layer Developed at BNL Instrumentation Gr. • Single sided • 1+1 dimensional readout ( X and U direction) • 3cmx3cm sensor x2 / chip • 768 X strip and 768 U strips/chip Position resolution is 25mm by test beam

  13. Strip Readout SVX4 Readout chip Readout Test board (Testing now) 3cm x6cm sensor • Developed by FNAL for TEVATRON RUN2b (Rad hard) • 8 bit ADC for each channel • 128 channel per chip • 3 SVX Chip • Packing factor is same • Control by onboard FPGA

  14. Schedule and status • Pixel Readout test End of 2005 • Strip Readout test Fall of 2005. • Structure design study Start now • Prototype ladder Early 2006 • Production (Japan) Start in 2005 • Production (US) 2007 • Installation complete 2009 (Possible early partial implementation) • Total cost ~8M US$ (Japan, US, France)

  15. Expected Performance D0 decay Collision Vertex Expected occupancy at Au-Au 200GeV most central event Distance to the Closest Approach [cm]

  16. Photon + 2p VTX tracker Using only Photon information Spin performance parton X reconstruction by g + Jet Great improvement with VTX

  17. Summary • PHENIX Silicon Vertex Tracker will open new physics horizon for both Heavy Ion and Spin program of RHIC. • There are two of inner pixel layers, two of outer strip layers and forward mini-strips • Hardware R&D work is on going. • Completer installation in 2009 for RHIC RUN9(2009/2010). • Plans underway for early partial implementation. Related Posters Forward Silicon G.J. Kunde (#297) Pixel Layer K. Fujiwara(#292) Strip Layer D.E. Field (#290)

  18. Structure summary (Backup)

More Related