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The Nosecone Calorimeter an update

The Nosecone Calorimeter an update. PHENIX DC Upgrades Meeting R. Seto Nov. 8, 2005. plan for today. Rich (a completely bureaucratic talk) Physics motivation simulations (also covered by EK) collaboration/management Funding CDR preparation Eduoard Update on Technology solution

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The Nosecone Calorimeter an update

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  1. The Nosecone Calorimeteran update PHENIX DC Upgrades Meeting R. Seto Nov. 8, 2005

  2. plan for today • Rich (a completely bureaucratic talk) • Physics motivation • simulations (also covered by EK) • collaboration/management • Funding • CDR preparation • Eduoard • Update on Technology solution • simulations • R and D • Present tasks

  3. Heavy Ion Physics hard scattering Gamma-jet heavy flavor Chic charm pA collisions and the CGC and Nucleon structure direct photons dileptons hadrons jets Spin Structure Delta G Gamma-jet NCC will help both low-x and high -x Transversity W’s (isolation) Pi0 at high E, two photons total E assym Photons Electrons Jets Physics Motivation/Simulations NCC in pp, pA, AA 1<y<3 MPC 3<y<4 Coverage by calorimetry -4<y<4 together with VTX, PHENIX becomes a large acceptance ~4π detector

  4. reminder and summary of “old” simulations • Energy resolution 20%/sqrt(E) • Jet energy measurement possible 100%/sqrt(E) • C • measurements possible to ~2.5 in central Au-Au • Direct photon measurements • in Au-Au (for -jet measurements) • ~1, pT> 6 • ~1.5, pT> 8 • ~2, pT> 10 • in pp and dAu • all ~2, pT> 2-4 depending on 

  5. hadronic compartment electron energy resolution jet energy measurement vasily

  6. hadron rejection ~10-2 to 10-3 charged pi in pp cut is based on longitudinal shower shape only (we will need to include the lateral shape in the algoritm) remainder after cut hadron rejection ratio vasily

  7. measuring the χC background subtracted • Central 0-10% Au-Au m-m (with background) • Assume RHIC II statistics, i.e. 10x our plan • use 10X (10% central of run 8 – 1500 ub-1) =2.0-2.5 =1.0-1.5 =1.5-2.0 =2.5-3.0

  8. Direct photons: central Au+Au bkg (simulated) • Problem is pile up faking a photon, pessimistic evaluation (no gamma/pi0 rejection) • Problem worst at high y since the effective segmentation is larger • Statistics is central 10% of run 8 – 1500 ub-1 =1.5-2 =1-1.5 y=1-1.5 pi0’s is from fitting Au-Au pi0 bkg (extrapolated) lack bkg statistic for study =2-2.5 =2.5-3 dir photon • Ok to ~2.5 • At ~1. require pT~6 GeV • Below that we have to subtract statistically dir photon From Pythia (5GeV cut) pt

  9. pp central 20% dAu =1.5-2 =1-1.5 =1-1.5 • All  OK =1.5-2 =2-2.5 =2.5-3 =2-2.5 =2.5-3 10 GeV 10 GeV 10 GeV pt 10 GeV

  10. W isolation Mickey The plots for the Edep rejection are attached. The cuts are cone radius R1=0.25, R2=0.5, R3=0.75, R4=1.0, where R=sqrt(deta**2 + dphi**2) as usual. The blue histograms are for W->mu, and the red histograms are for jet events. In the Pythia events I triggered on pt >= 10 GeV muons from W, and on charged hadrons for the jet events, in the acceptance of the muon arms, and then integrated all the energy in a cone radius (and in the acceptance of the NCC), with a response of 1 for photons and electrons, 0.5 for pi,K,p, and 0.4 for neutrals (K0L, n). The distributions are normalized to 1. In eff_rej I plot the rejection of the jet events (reddish histograms) and the efficiency for the W->mu (bluish histograms). For the W->mu efficiency curves, it goes as R1 to R4, from top to bottom, while for the jet rejection curves, it goes from R4 to R1, top to bottom. W eff R1 require PT>10 GeV R4<1 R3<.75 R2<.5 R1<.25 D0 uses R<.4 R4 Energy around W muons R4 R1 for R<R3 kill 90% of jets keep 80% W’s Energy around jet R1 jet rejection

  11. new PISA studies • NCC in pisa (Vasily); not “final” design • found “normalization” • Clustered “photons” w/ primitive clustering algoritm • Found energy and position of each photon • No pi0/gamma used yet • Threw sample of single pi0’s for reconstruction excercise • 1 to 5 GeV momentum • 10-30 degrees • both gammas had to hit NCC • required gamma to be separated by 2 cm • required E1 and E2 > 0.5 GeV • |E1-E2|/(E1+E2)<0.5

  12. Energy resolution 22%/sqrt(E) for E<5 E (GeV) 31%/sqrt(E) for higher E Position Resolution cm E (GeV)

  13. all compartments g/pi0 2C 1C 3C display top left all 3 views bottom right 3 views colors are photons found “mass” is real mass “mass recon” – is reconstructed mass 1C 1C 2C g/pi0 2C 3C 3C

  14. the gamma/pi0 at work

  15. pi0 resolution E<5 GeV input to pisa smear mass input from pisa to NCC GeV GeV final mass reconstructed after cluster finding etc final mass recon but use real angles GeV GeV

  16. Now add other particles • Primary sample pi0: 1-5 GeV • add charged pi’s 1-5 GeV • So extra particles add bkg • do mixed subtraction in AuAu add 4 pi bkg pi0 only add 2 pi add 1 pi

  17. future studies (next month) • Performance • to what energy does 2photon+asym pi0 detection work? • How much can we improve direct photon using gamma/pi0 • Study what can be done with current jet energy resolution • Physics • redo χC and direct photon study with more realistic assumptions (resolutions etc) • simulation correlation and error bars on • photon – jet (pi0) in AuAu • measure x in direct photon and photon-photon in pp (spin) • i.e. delta G measurement • Reaction plane measurement (Shinichi)

  18. USA BNL:lab Physics (Management, Design, Integration, engineering etc) Instrumentation (engineering, Gamma/pi0 design, front end chip) UCR (Simulations, management, software) ISU (Trigger, Simulations) UIUC (Simulations, Physics ideas) Nevis (chi – FEE readout) Korea (Si- pads/gammapi0) Yonsei Ewha SENS: company ERTI:company Japan Riken (lab) Czech Republic (Gamma/pi0 testing, constuction) Charles U Academy of Sciences Prague Tech U ON semiconductor:company Russia Moscow State U (Si pad design, testing, engineering) JINR-Dubna – 2 groups (lab) (Engineering, Mechanics, tungsten, assembly) MEPHI (front end electronics) Ekaterinbourg (company- board assembly) RIMST-ELMA (company-Si construction) Collaboration

  19. Management Plan • We will have to work out a management structure – once we have all the responsibilities assigned • For construction (EK) • For Money DOE/Riken/Other (RKS)

  20. Funding • Small amount of funding so far for R and D • Riken, UCR, BNL, Local Russian funding for themselves, Czech for themselves (a fair amount) • What do we need? • R and D • I claim with $3M in cash we can build one side • this might change as we do a better cost estimate in the next month • Purchasing Si and W now (~200K worth Riken) • Major funding (hopes!!!) • Riken $1.5M • DOE ~$2m - $5M • Other ~$1M • Major question - timing

  21. Schedule in the next couple months • CDR • Skeleton in CVS (CVS co offline/analysis/NCCCDR) • Major tasks • Writing • Cost estimate • Timeline • Dec ~4 CDR to collaboration • EC/DC etc review • Jan • BNL Review • Feb – To DOE • Beam Tests – now at Dubna (Vasily/Andrei with Merkin, Litvinenko etc) beam test 9th to 13th (1st prototype) • Korea Trip Nov 14-18 – EK/RKS • In the next year • Large prototype being designed (with gamma/pi0) • Full electronics

  22. Commission NCC proto 1 Old Gannt chart from LOI

  23. Readers PHENIX folks Ahbay - spin, and pA Ed Kinney - Spin Atsushi - lots of it (design etc) Matthias - lots of it. Ken – spin Miraslov Finger (Charles Univ) Outside folks Raju Venugopalan (pA - saturation) Mark Strickman - nucleon strucutre Dima Kharzeev writers RKS EK Mickey (spin) Jen-Chieh (pA and nucleon structure) Mark Strikman (pA and nucleon structure) John L (hard scattering) jamie (charm and chic) Could use another person in each of spin, heavy ion, pA CDR writing/reading team

  24. 1. Executive Summary (RKS) 2. Physics Overview (a) Heavy Ion Physics i. Gamma-jet (John L I hope) ii. Chic (Jamie) iii. charm (Jamie) (b) pA collisions and the CGC (Jen-Chieh+R. Seto) i. direct photons ii. dileptons iii. hadrons iv. jets (c) Spin Structure of the nucleon (Mickey - how much?) i. W ii. Delta G Gamma-jet iii. Transversity (d) Nucleon structure (Jen-Chieh) 3. Physics Measurements with the NCC (RKS) (a) Performance i. Pi0 ii. Photons iii. Electrons iv. Jets (b) Physics reach i. Heavy Ion Physics ii. Spin Structure iii. Nucleon Structure (c) Physics reach with the all Upgrades CDR Outline

  25. 4. The design of the NCC (EK) (a) Overview (b) The Calorimeter (c) EM compartment (d) Hadronic compartment (e) Gamma pi0 detector (f) Electronics (g) Mechanics and Cooling (h) Integration (i) Triggering 5. R and D (EK) 6. Project Management and Responsibilities (RKS) (a) Overview (b) Management Structure (c) Responsibilities 7. Budget and Schedule (RKS, EK) (a) Total Estimated Cost (TEC) (b) Contingency Analysis (c) Overhead (d) Budget (e) Fiscal Responsibilities (f) Schedule 8. Appendices outline (cont)

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