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Run 2B upgrades di CDF

Run 2B upgrades di CDF. INFN - Riunione della Commissione 1 Laboratori Nazionali di Frascati 14 Maggio 2002 Franco Bedeschi INFN-Pisa. Stato Tevatron e CDF Run IIB: CDF upgrades per il run IIB Piano finanziario per il Run IIB upgrade . SOMMARIO. TeV Luminosity.

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Run 2B upgrades di CDF

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  1. Run 2B upgrades di CDF INFN - Riunione della Commissione 1 Laboratori Nazionali di Frascati 14 Maggio 2002 Franco Bedeschi INFN-Pisa • Stato Tevatron e CDF • Run IIB: • CDF upgrades per il run IIB • Piano finanziario per il Run IIB upgrade SOMMARIO

  2. TeV Luminosity • Peak luminosity still low but improving • X2 since January 2002 • Best 2x1031 • Delivered/on tape • 40/25 pb-1 Delivered On tape

  3. Run 1 comparison • Luminosity progress in Run 1 • ~1 yr to get x10 • Steady progress after that

  4. From Mike Church PMG 1/8/02 presentation TeV Luminosity • Medium range plan • Current performance ~60% of Church plan • Does not include effect of October shutdown

  5. Luminosity • Massive effort put into understanding and improving Luminosity • Fixed Accumulator  MI optics • Much work on stabilizing tunes in injection and low beta squeeze • Fight large p-bar emittances • Work on accumulator lattice to reduce beam heating • Access early June to add transverse cooling to accumulator is expected to improve L by factor 2 – 4 • Max luminosity achievable without Recycler ~8x1031 (maybe by end of 2002) • Need recycler to get to 2x1031 • Major shutdown in October ’02 to finish Recycler work • Full benefits of Recycler ~Summer 2003

  6. Status of CDF • Detector: • All systems installed and commissioned • ISL will be fixed during the next accesses this summer/fall • DAQ and trigger: • Running physics trigger table with > 100 trigger paths since February ‘02 • New SVT very successful • Typical running conditions: • L1: 3.5KHz, L2: 200 Hz, L3: 20 Hz • Data processing: • Reconstruction farm keeps up with data logging • Physics groups skim data: • Observe signals from low and high pt triggers: y, D, B, W, Z • Some preliminary results expected for Amsterdam this July

  7. Recent problems • Broken wire in COT • Wire plane removed • Need additional fixtures to replace (October shutdown) • Minor impact on current data quality • Lost 6 SVX II ladders, maybe due to radiation accident • Silicon has been off for about a month until May 2nd • Now back to normal operation, after • Many studies were done to understand what happened • Irradiation tests at booster delivering x100 – 1000 more than suffered during accident • Several additional interlocks and protections put into place • Probability of same conditions as accident severely reduced

  8. First results • Much data recorded to debug detector and trigger • Actual data so far used for analysis with stable and complete detector and trigger configuration • ~ 6 pb-1 • Specific analysis non requiring all of the detector information can use larger data sets

  9. 298 W events Central Muons ET >12 GeV ET >20 GeV W and Z’s From 3.65 pb-1

  10. W  t n • Tau’s very clean with new detector/selection algorithms

  11. CDF: J/y m+m- • Clear J/y signal • CMU or CMX • ~ 60,000 y’s • s = 21 MeV/c2 (16 with SVX II) • J/y x-section ~9nb as expected

  12. CDF: J/y m+m- • First checks on physics: • Inclusive B lifetime from J/y consistent with expectations • ctB ~ 470 mm from unbinned fit • Systematics still out of control! • Prompt y fraction ~ 85% • Consistent with lower momentum cut relative to Run I

  13. Bs Bd Bu First B signals

  14. yields: So much Charm!!! • Getting much more charm than expected with SVT!!! E791 6 pb-1 (4S)/100 fb-1 50 pb-1 2 fb-1 FOCUS 500K 20M 40K 120K 1M 60K Large yield, but poor PID, trigger bias, prompt & secondary charm………. Need to understand how to make best use of it

  15. The current detector was designed/built based on Run IIa specifications: Maximum instantaneous luminosity of 2×1032cm-2s-1. Integrated luminosity of 2 fb-1. Operation with 396 ns and 132 ns bunch spacing CDF for Run II

  16. The Run IIb Specifications • We now consider the detector to have a longer, harder life. • Operating conditions for Run IIb: • Maximum instantaneous luminosity of 5×1032cm-2s-1. • Integrated luminosity of 15 fb-1. • Not all portions of the detector can operate effectively in these conditions • The Run IIb project consists primarily of replacements for key elements needed for high luminosity running • Make changes needed in a 6 month shutdown starting approximately in Spring 2005

  17. The Run 2B Specifications • Luminosity profiles from Tevatron Run 2B TDR

  18. Upgrades List • 4 projects well established as seeking Stage 1 approval at June PAC and being part of the baseline review of late July 2002 • Silicon tracker, Central pre-radiator, Event builder switch, EM calorimeter timing • CSX scintillator/L3 CPU replacements are treated as maintenance • Italian interest in all but the Event builder and L3 • Additional trigger/DAQ upgrades presented to PAC in April 2002, but need more work to become part of DOE baseline (TDC, L2, 3-D track trigger) • No Italian interest so far for these projects

  19. DOE Baselining Update • DOE baselining dates have been slipping from May to October 2002. Current estimates: • DOE review for CD 1 approval (definition of scope): LateJuly, 2002 • DOE review for CD 2, 3 (cost baseline, spend construction money): October 2002 • Baselining in October is well matched to our September budget meeting

  20. Run IIa silicon system • Radiation damage tests and rate measurements allow us to predict the lifetime of the SVXII. Silicon detector end view

  21. Silicon Installation ISL and SVXII positioned for installation (Jan. 2001) • Silicon detector replacement • Space constraints require removal of the central detector from the collision hall • This requires 14 weeks (round trip). • Time constraints force a complete replacement of SVXII. • Partial replacement would also be very risky.

  22. SVX Replacement • The replacement silicon detector is being designed to be simple, and should be relatively quick to build. • Based on single sided detectors • Readout chip is common with D0, manufactured in a standard process. • One structure is used for most of the detector • Compatible with existing systems • Data acquisition • Cooling • Developments since Nov. 2001 have simplified the design we propose to build.

  23. Silicon Detector - Run IIb • New detector is designed for quick construction • A basic module - the “stave” will be built • This structure will populate most of the detector volume • This gives the advantage of fewer parts than the current detector

  24. Single sided sensors will be used for Run IIb. Axial and small angle stereo layers will be joined in a single structure – this is used for layers 1-5. Layer 0 (innermost) will be axial only, and a different structure. Stave layout Silicon Detector - Run IIb Mini Portcard Hybrids Chips Axial Sensors Stereo Sensors

  25. Run IIB Silicon • Chip development and production • Cost: 30 k € (R&D){funded} + 130 k €(1/3 of chip production) • Funding year: 2002 • Foreign Institutions on sub-project: LBL, FNAL • Italian Institutions on sub-project: Padova • Physicists on sub-project: Alfonsi,Bacchetta, Centro, Garbossa, Guang, Neviani • Power supplies development and production • Cost: 25 k €(R&D) + 150 k €(1/3 of production) • Funding year: 25 k €in 2002, remaining in 2004 • Foreign Institutions on sub-project: FNAL • Italian Institutions on sub-project: Padova • Physicists on project: Bacchetta, Bisello, Wang + technical personnel

  26. Run IIB Silicon • Mechanical work (precision fixtures): • Cost: 17 k € • Funding year: 2002 • Foreign institutions on project: FNAL + many contribute to other fixtures • Italian institutions on sub-project: Bologna • Physicists on sub-project: Zucchelli • SVT modifications: • Cost: 100 k €(12 merger boards) • Funding year: 2003-2004 • Foreign Institutions on sub-project: Chicago (fitter boards) • Italian Institutions on sub-project: Trieste, Pisa • Physicists on sub-project: Ristori, Belforte, Zanetti • Simulation and reconstruction software • Italian Institutions on sub-project: Roma1, Padova • Physicists on sub-project: Giagu, Rescigno, Jeans, Sarkar, Azzi, Sidoti

  27. Run IIB Silicon • Detail R&D requests: • 25 k €PS test system: • $10,000 crate SY1527 • $ 3,100 modulo A1551 di alta tensione • $ 2,900 modulo A1518 di bassa tensione • $ 1,500 consumo per cavi connettori, load box • IVA • 17 k € Gluing Fixtures (R&D and production) • Al prototype (production and measurement) • Steel Prototype (production and measurement) • Production of 10 pieces

  28. Central Preradiator • Located on the front face of the central calorimeter • The current device is a gas chamber • Charge must be collected over 4 beam crossings • Will contain data from ~20 interactions in Run IIb • The rate will seriously compromise its usefulness. 100 10 < N> 1 Run IIb 396 ns 132 ns Run IIa 0.1 1033 1030 1031 1032 Luminosity (1032cm-2s-1)

  29. CPR for High PT Electrons • The pre-radiator provides an estimate of pion backgrounds to electrons • Can provide some rejection • Note, the shower maximum chamber is also gas, and inaccessible • Pre-radiator is our only avenue to strengthen electron ID. Run I hi-pt electrons p electrons MIPS

  30. Again, the ability of the CPR to discriminate between pions and electrons was used for tagging in Run I. 2 GeV particles from Run I CPR data was used to reduce p background CPR for Soft b tagging

  31. Some jet energy algorithms under study indicate that resolution can be improved by including CPR information. Jet resolution impacts directly sensitivity to Higgs or any other high mass particle decaying into jets CPR for Jet resolution

  32. Pre-radiator Replacement • The pre-radiator replacement will take the place of existing CPR. • Replacement uses scintillator • Dubna scintillator currently assumed as default option • Minos excess is possible, used for the first prototype • Other approaches will be studied (BICRON) • Optical fiber readout, with 16 channel phototubes • Same readout used in the plug calorimeter shower maximum detector, same phototubes

  33. Pre-radiator Installation • Installation requires the calorimeter arches to be extracted • Not possible in collision hall • Assembly hall installation does not interfere with silicon CPR location

  34. Run2b Pre-shower • Non-italian institutions: • ANL, FNAL, Michigan State, Tsukuba • Italian institutions: • Pisa, Siena, Roma1, Pavia • Italian physicists on CPR project: • Introzzi, Iori, Lami, Menzione, Paoletti, Scribano, Turini (R&D phase)

  35. Run2b Pre-shower • Cost of current default solution with JINR scintillator: • Italy contributes total of 182 k$ = 202 k€ • new scintillator 80 k € (funding yr 2003/04) • fibers & conn. 45 k € (funding yr 2003/04) • PS and Cables 57 k € (funding yr 2003/04) • Prototyping 20 k € (funding yr 2002) • Details of R&D request: • Scintillator, shipping and mechanical work 3,500 € • Fibers & glue 1,500 € • 2 PMT with bases 4,500 € • Electronics 6,000 € • Mechanics 3,000 € • Miscellaneous 1,500 €

  36. EM Calorimeter Timing • Cosmic background removal is essential (e.g. Z m+ m-,) • Hard to do with g Need for EM calorimeter timing • Calorimeter timing currently implemented only on hadron calorimeters

  37. EM Calorimeter Timing • In g + MET events hard to find a good handle to remove cosmic backgrounds • Figure shows comparison of some natural discriminating variables for “in time” and “out of time” data • No big difference between distributions

  38. EM timing • Physics Motivation: • Important for SUSY, LED searches which rely on photons • Important for studies of W/Z g production • Important for any other study involving g • Our eeggET had 2 EM object missing timing information! SM Background estimate of 10-6

  39. Run 2 EM timing • Currently only Hadronic Calorimeters have timing instrumented • EM shower needs to leak into Hadronic section to be timed  inefficiency! Run II g +MET Trigger threshold

  40. EM Calorimeter Timing • Examples: • EWK physics: Wg,Zg production • SUSY searches: N2g G ~ ~ Run II x30 run 1 acceptance Need good containment of shower to have reliable efficiency calculation - No EM timing  Higher threshold Run 1

  41. EM Timing • Solution: • Add TDC timing to EM calorimeters: Central and Plug • Minimal R&D • Project risk low: • No need for PMT base modification • Inductive pick sufficient and does not change charge collected by ADC • Installation possible during 2003 well before the Run IIB shutdown!

  42. EM timing • Non-italian institutions: • Texas A&M, Chicago • Italian institutions: • LNF • Italian physicists on EM timing project: • Dell’Agnello, Cordelli, Happacher, Miscetti, Sansoni

  43. EM timing • Cost of EM Calorimeter timing • Italian contribution 130 k$ = 144 k€ : • ASD 74 k€ • Transition boards 25 k€ • ASD  TDC cables 25 k€ • Prototyping 20 k€ • Details of R&D: • Design and build 4 ASD/TB pairs for larger scale test this summer

  44. Run 2B CMX counters • CMX Scintillator Counters • Counter fabrication/installation and commissioning • Cost: • 85 kEuro (scintillator/fabrication – 50% of all counters) + • 75 kEuro (installation and refurbishing of current system) • Funding year: 2002(85 kEuro), 2003-2004 (75 kEuro) • Foreign Institutions: JINR-Dubna • Italian Institutions: Udine (with physicists from Roma), Pisa • Physicists on project: Pauletta, Menzione

  45. Run IIB Summary • Cost summary compared to other international funding

  46. Run IIB • Summary Run 2B Italian requests

  47. Italian Group in Run 2B • Results of poll to verify size of Italian group in Run 2B (% of current group size by staff physicists) • Bologna: 100 • Frascati: 70 • Roma: 55 • Padova: 55 • Pavia: 100 (1 person) • Pisa: 75 • Trieste: 75 • Udine: 90

  48. Conclusions • Concerns about Tevatron luminosity continue, but finally see signs of improvement • CDF detector working well. Few problems have been effectively dealt with • The Run IIB contributions from Italy are taking shape • Costs (R&D + M&S) are well defined • Italian group interest and involvement is clear • Need to start ASAP with the R&D work • Need a clear encouragement from INFN on the overall plan

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