Presentation is loading. Please wait.

Presentation is loading. Please wait.

Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Stato dellesperimento CDF Run IIA: Stato del Tevatron - Funzionamento fino ad ora -

Similar presentations


Presentation on theme: "Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Stato dellesperimento CDF Run IIA: Stato del Tevatron - Funzionamento fino ad ora -"— Presentation transcript:

1 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Stato dellesperimento CDF Run IIA: Stato del Tevatron - Funzionamento fino ad ora - Aspettative nel futuro a breve termine Stato di CDF - Rivelatori (silicio, trigger) - Primi segnali nei dati raccolti e previsioni per lestate 2002 Run IIB: Piani a lungo termine per il Tevatron Stato upgrades di CDF per il run IIB Proposta di piano finanziario per la collaborazione italiana SOMMARIO Riunione INFN - Gruppo1 Roma, Dicembre 2001 Franco Bedeschi INFN-Pisa

2 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Tevatron Commissioning March 2001: Start commissioning April 2001: First 36x36 store June 1: Start stable operation Some unexpected shutdowns May 2001: Conning tower leaks July 2001: Refrigeration system failure Steady running: End July – Early October Planned shutdowns October 8, 2001 – 6 weeks - Now completed: beam back on July 1, Install more p-bar cooling

3 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Tevatron Luminosity profile Delivered until October shutdown - 12 pb -1 delivered - 5 pb -1 on-tape Much commissioning work Expectations: pb -1 delivered by July shutdown pb -1 delivered by end of 2002

4 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Tevatron Peak luminosity Close to Expect better tuning/ transfer efficiencies ~2x10 31 by January x10 31 by June 2002 Improvements: - More p-bar cooling 5-8x10 31 Summer/Fall Recycler operational >10 32 sometimes in 2003

5 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Tevatron issues Proton source: Not a problem now. Must improve capacity to support also MiniBoone and Minos October shutdown work: - High rep. rate kicker installed - More shielding Main Injector: Works well October shutdown work: - More corrections elements in transfer lines Tevatron: Old but fine October shutdown work: - Preventive maintenance Recycler Ring: Still not commissioned October shutdown work: - All magnets realigned and refurbished - Correction elements installed - Cooling improved - MI shielding improved P-bar source: Large transverse emittances affected transfer efficiency and beam-beam effects - Need more cooling power (summer 2002 SHUTDOWN) October shutdown work: - Improved vacuum - Stack tail cooling improved

6 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Tevatron Luminosity Period: 1/15 – 6/15 Variations on situation before Oct. shutdown x2.5 p-bar x1.5 proton >x2 tranf. Eff. Reduce emittances Reasonable! More uncertain Need more cooling After July shutdown

7 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF Massive amount of work during shutdown! Including miniplug installation Current status: Silicon: major achievements (see later) COT: stable operation TOF: stable operation Calorimeters: stable operation (miniplugs still being tuned) Muon systems: - Stable operations for CMU, CMX (excluding miniskirts) - CMP commissioned but suffers for high losses being understood - Commissioning of forward muons is on-going Trigger: - L1: stable operation - L2: major achievements (see later) - L3: stable operation with more nodes

8 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: Silicon Major improvement on silicon systems after October shutdown: SVX II: - Ladders: 310 perfect + 32 usable/360 = 95% - Tracking wedges (4/5): 68/72 = 94.4% (usable by SVT) ISL: - ~2/3 of detector is cooled - 94% of cooled ladders are working - Major success opening two blockages with laser surgery!!! Will open the whole detector by summer during short accesses L00: /48 functioning ladders Silicon aligned to beamline to remove bias in SVT triggers

9 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: fixing ISL Current status: L7 is all cooled – 50% of ISL - Power on inner ladders triggers safety protection, due to layer 6 warm up - Reworking interlocks to allow operation 1/3 of L6 is cooled Plan is to have all ISL cooled before summer Beamline L7 L6 Module 2 readout ladders = Ladder cooled and powered Ladder cooled but not powered Ladder not cooled

10 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 elbows ~1,5 meters Inlet/outlet manifolds CDF: fixing ISL Must reach blocked elbow through inlet manifolds

11 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: fixing ISL Actual access is from COT face Plan is now to fix ISL in a series of short 3-4 day accesses

12 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: Trigger All elements for a physics trigger table in hand Working on a table for first 6 months of 2002 data taking Done by early January Lot of L2 problems fixed: - Now cutting on jets and SVT - Running with multiple Alpha - L2 electrons are close Current trigger more than adequate to deal with luminosity expected in first half of 2002

13 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: SVT Online D resolution SVT fully functional Uses tracks from XFT Online fit of primary V. Beam tilt aligned Cutting at L2 Still missing - Internal SVX alignment L2 cut on SVT

14 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: SVT SVT track pair invariant mass show clear evidence of strange and charm after decay length cut Peaks can be used to monitor SVT These plots available at L3

15 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: Particle ID Preliminary TOF results K p Preliminary dE/dx Measurements in COT p t GeV/c

16 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: Data Currently ~5 pb -1 on-tape Data Handling: Over 80 Million events recorded on tape and processed by reconstruction farm ~ 50 Tbyte of data stored in tape library Several secondary data sets useful for physics being stripped: J/, W, Z, photons, jets, …

17 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 W and Zs From 3.65 pb-1 Central Muons E T >12 GeV E T >20 GeV 298 W events

18 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF: J/ Clear J/ signal CMU or CMX - ~ 17,000 s = 26 MeV/c 2 First Run II B peak !!!! (J/ ) ~ 9 nb % from B ~ 20%

19 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF Physics by Summer 2002 Expectation ~ pb -1 by Summer 2002 Incremental improvements and feasibility studies for top, EWK and QCD Xs mixing parameter should be well within reach 5 x s reach Yellow Book 2000 Luminosity No L00 5 x s reach BTB PAC proposal Luminosity No L00 D s only

20 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CDF Physics by end of 2002 Expectation ~ 400 pb -1 by end of 2002 sin(2 ) with good accuracy Sufficient statistics to update our previous top and W/Z measurements Hints for new phenomena?! End 2002

21 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Current status Summary Tevatron back to pre-shutdown luminosity, but still ~6 month late on expected luminosity profile The CDF detector is almost out of the commissioning phase and is taking data of good quality The silicon systems are mostly fixed L2 trigger is greatly improved and adequate to expected luminosity, in particular SVT works beautifully We have a good chance of collecting pb -1 by Summer 2002 and possibly present first results on x s and (maybe) sin(2 ) on a similar time scale.

22 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Future upgrades Fermilab is pursuing the goal of accumulating 15 fb -1 by FY Increase the number of protons on the antiproton target - Better collection efficiency of antiprotons - Better cooling of the antiprotons - Better antiproton transfer efficiency 200 page TDR available: pdf

23 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Future upgrades CDF needs to be upgraded to match this laboratory plan Run IIA: Lmax ~ 2x10 32 and total luminosity 2 fb -1 Run IIB: L max ~ 5x10 32 and total luminosity 15 fb -1 CDF guidelines: Implement minimum set of upgrades needed to preserve the current functionality at high luminosity Upgrades will be installed in a 6-7 month period at beginning of 2005 Major project deadlines: October 2001: Run IIB upgrade TDR distributed November 2001: upgrades discussed with PAC December 2001: upgrades reviewed by Technical Committee April 2002: PAC meeting After PAC: DOE baseline review - Need MOUs before this meeting

24 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIb Run IIB TDR completed – Included are: SVX IIB: new silicon tracker ($ 11.2 M) Scintillator based preshower ($ 0.76 M) Replacement of CSX ($ 0.17 M) EM calorimeter timing ($ 0.40 M) Event builder/L3 trigger upgrade ($ 0.5 M) Track trigger upgrade ($ 0.62 M) Other trigger/DAQ upgrades (???) Need access to the detector - Schedule constrained by 2005 shutdown date Do NOT need access to detector so can be on a longer timescale Total with 30-50% contingency $ 13.7 M TDR available at

25 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB PAC review November 2, 2001 Funding available from DOE is $ 9.1 M Recommendations: - - Should focus on upgrades that are critical for the Higgs search - Simplify the silicon detectors - Concentrate mostly on silicon - Assign 40% contingency to all silicon items - Critical startup work for silicon detector approved: SVX4 production Silicon sensor prototypes Hybrid/custom cable production Stave mechanical/electrical prototype

26 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB CDF acknowledges the limitations in funding, but considers the proposed limitations in scope hard to accept since: They ignore other major parts of our physics program: - Supersymmetry, technicolor, extra dimensions and other exotic physics seaches - B physics beyond the run IIa Given the current uncertainties on the final integrated luminosity, improvements of the detector beyond the silicon increase our probability of major discoveries. Need good foreign support to expand the upgrade beyond the silicon detector replacement. Great time to join CDF! Japan ~ $ 2.5 M for - silicon sensors - preshower PMTs

27 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB Lab Technical review December 4, 2001 Reduced list of requests to the Lab to fit in the budget guideline - Silicon replacement (*) - Preshower (*) - Event builder upgrade These items have received the full support of the review committee Some upgrades are naturally dealt with as maintenance - L3 computers - CSX replacement (*) CDF still supports the need for the remaining upgrades and is actively looking for funding out of the Laboratory: - University grants, NFS grants, foreign funds Upgrades in this category are: - CEM timing (*) - L1 track trigger upgrades - Other Trigger/DAQ upgrades (*) indicates interest from some Italian group

28 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB The Italian interests and activities for run IIB are still in the process of coming together Clear interest for silicon, preshower, CEM timing and CSX Growing interest to some trigger upgrades in the future No urgency for funding in 2002 except for our contribution to SVX4 chip production silicon Power Supply R&D Preradiator R&D SJ on CSX scintillator A funding profile for should be defined subject to further verification based on the evolution of the interest of Italian physicists and groups, and of the review and funding process in the USA More details on individual projects follow

29 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB Silicon Physics: B, Higgs/Exotic searches, QCD, ….. Status of approval: PAC/Lab director recommend to start R&D for all critical elements SVX4 chip development and production - Cost: 30 kEuro (R&D) {funded} kEuro (1/3 of chip production) - Funding year: Foreign Institutions on sub-project: LBL, FNAL - Italian Institutions on sub-project: Padova - Physicists on sub-project: Bacchetta, Neviani, Centro Power supplies development and production - Cost: 20 kEuro (R&D) kEuro (1/3 of production) - Funding year: 20 kEuro in 2002, remaining in Foreign Institutions on sub-project: FNAL - Italian Institutions on sub-project: Padova - Physicists on project: Bacchetta, Bisello, technical personnel

30 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB Silicon SVT modifications: - Cost: 100 kEuro (12 merger boards) - Funding year: Foreign Institutions on sub-project: Chicago - Italian Institutions on sub-project: Trieste, Pisa - Physicists on sub-project: Ristori, Belforte, Zanetti at al.

31 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Other run2b projects: Pre-shower Pre-shower used in > 100 Run I analysis papers Current implementation with wire chamber cannot stand the rate of run IIB Need faster scintillator based implementation Pre-shower located after magnet coil in front of central EM calorimeter

32 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Other run2b projects: Pre-shower Motivations: Electron ID - Allows data driven bck determination separation (statistical only) - Above 35 GeV cannot separate from in shower max chamber - Use pulse hight from single and double in pre-shower Improve e/ /jet energy measurement - Correct for energy lost in coil High p t electrons Low p t electrons e e

33 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Other Run IIB projects New preshower Physics: Higgs (jet resolution), separation, electron ID Status of approval (December 2001): - Endorsed by technical review committee. Expect approval at April PAC R&D, PMT Power supplies, fibers, installation May have a more significant part on detector construction - Cost: 20 kEuro (R&D) kEuro production - Funding year: 2002 (R&D), production - Foreign Institutions: Argonne, Tsukuba, Michigan State - Italian Institutions on project: Pisa (with members from Siena), LNF - Physicists on project: Lami et al.

34 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CEM timing Motivation: Reduce cosmic ray background Critical for SUSY searches which rely on photons Our ee E T had 2 EM object missing timing information! SM Background estimate of 10 -6

35 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 CEM timing Examples: EWK physics: W Z production SUSY searches: N 2 G ~ ~

36 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Other Run IIB projects EM Calorimeter timing Physics: photon purity (SUSY), long lived particles decaying to (SUSY) Status of approval: - Approval not requested until better understanding of CEM PMT base modification impact is reached. Discriminator boards (LNF design – same as Run IIA) - Cost: 150 kEuro - Funding year: Foreign Institutions: Texas A&M, Chicago - Italian Institutions: LNF - Physicists on project: Cordelli at al.

37 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Other Run IIB projects CMX Scintillator Counters Physics: all muon related signatures Status of approval: - Lab approval not required. Will be treated as a detector maintenance project. CDF will decide based on the understanding of the counter performance and their degradation. However: Delaying too much may compromise possibility of replacement during the 2005 shutdown. Building now is an insurance toward likely future degradation. 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), (75 kEuro) - Foreign Institutions: JINR-Dubna - Italian Institutions: Udine (with physicists from Pavia, Trieste, Roma), Pisa - Physicists on project: Pauletta, Menzione et al.

38 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB Richieste alla commissione: 2002: 140 KEuro + 85 KEuro S.J. per CSX : approvazione di massima della congruita del piano finanziario - Tale piano costituirebbe la base per la scrittura delle MOU sul Run IIB - Tale piano andra rivisto in caso di crescita della collaborazione italiana

39 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Run IIB Confronto con gli altri contributi internazionali Il contributo italiano appare modesto - Sia considerando che costituiamo il 13.5% della collaborazione - Sia confrontato con quello del Giappone (6.1% della collaborazione)

40 Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Conclusioni Run IIB Fermilab sta iniziando un impegno serio per aumentare quanto possibile la luminosita del Tevatron Gli esperimenti CDF e D0 devono di conseguenza modificare i propri apparati per potere sopportare la maggiore luminosita sia instantanea che integrata previste dal 2005 in poi Tale necessita e stata riconosciuta sia da un comitato interno a CDF, che dal PAC e da un ulteriore comitato tecnico esterno. Su alcuni degli upgrades proposti si sta concentrando linteresse di diversi gruppi italiani La presente proposta che avanziamo alla CSN1 rappresenta un quadro di massima del prevedibile finanziamento pluriennale. Nel prossimo futuro verranno meglio definite le forze impegnate e gli impegni da assumere.


Download ppt "Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001 Stato dellesperimento CDF Run IIA: Stato del Tevatron - Funzionamento fino ad ora -"

Similar presentations


Ads by Google