Stato dell’esperimento CDF

Franco Bedeschi – INFN-Pisa Riunione Gruppo1 – Roma, Dicembre 2001

Stato dell’esperimento 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 l’estate 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 BedeschiINFN-Pisa


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, 2002- Install more p-bar cooling


Integrated Luminosity

0

2000

4000

6000

8000

10000

12000

14000

6/1/01 7/1/01 8/1/01 9/1/01 10/1/01 11/1/01 12/1/01 Date

nb

-1

Delivered (nb-1)

On-tape

Tevatron

Luminosity profile Delivered until

October shutdown- 12 pb-1 delivered

- 5 pb-1 on-tape Much commissioning

work

Expectations:- 100-200 pb-1

delivered by July shutdown

- 400 pb-1 delivered by end of 2002


Tevatron

Peak luminosity Close to 1031

- Expect better tuning/ transfer efficiencies

~2x1031 by January 2002

3-5x1031 by June 2002

Improvements:

- More p-bar cooling 5-8x1031

Summer/Fall 2002

- Recycler operational >1032 sometimes

in 2003

0

1

10

Date

Lu

min

osi

ty x

1030


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


Tevatron Luminositycomment

pb/bunch (E10)

protons/bunch (E10)

transfer eff.

peak lum. (E31)

period int. lum. (pb-1)

status quo 0.75 106 0.30 0.62 20

no fixes; faster shot setup; shorter stores

0.75 106 0.30 0.62 28

no fixes; faster shot setup; shorter stores; more study time

0.75 106 0.30 0.62 25

improve pbar xfer eff.; reduce pbar long. emit.; increase pbar ext. eff.

1.70 106 0.60 1.44 57

better lum. lifetime at L.B. (dampers) 1.70 106 0.60 1.44 71

increase proton intensity by 50% 1.70 160 0.60 2.17 100

increase pbar xfer eff.; reduce proton and pbar long. emit.; reduce pbar

trans. emit.; reduce shot setup time2.27 160 0.80 3.53 157

increase proton intensity by 40% 2.27 224 0.80 4.95 201

increase stacking rate and max. stacksize

3.02 224 0.80 6.60 264

reduce study time and optimize store length

3.02 224 0.80 6.60 329

design proton intensity 3.02 270 0.80 7.95 379

increased stacking rate 3.78 270 0.80 9.94 469

reduce shot setup; no studies 3.78 270 0.80 9.94 580

same as above but with luminosity only in +-40cm from IR

3.78 270 0.80 8.68 483

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


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


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:

- 47.5/48 functioning ladders

Silicon aligned to beamline to remove bias in SVT triggers


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

L7

L6

L6

Module 2 readout ladders=

Ladder cooled and powered

Ladder cooled but not powered

Ladder not cooled


elbows

~1,5 metersInlet/outletmanifolds

CDF: fixing ISL

Must reach blocked elbow through inlet manifolds


CDF: fixing ISL

Actual access is from COT face

Plan is now to fix ISL in a series of short 3-4 day accesses


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


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


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


CDF: Particle ID

Preliminary TOF results

K

p

Preliminary dE/dx

Measurements in COT

pt GeV/c


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, …


W and Z’s

From 3.65 pb-1

Central Muons

ET >12 GeV

ET >20 GeV

298 W

events


CDF: J/

Clear J/signal CMU or CMX

- ~ 17,000 ’s

= 26 MeV/c2

First Run II B peak !!!!

(J/) ~ 9 nb

% from B ~ 20%


CDF Physics by Summer 2002

Expectation ~ 100-200 pb-1 by Summer 2002 Incremental improvements

and feasibility studies for top, EWK and QCD

Xs mixing parameter should be well within reach

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500

5 xs reachYellow Book 2000

Luminosity

No L00

0

10

20

30

40

50

60

70

0 100 200 300 400 500

5 xs reachBTB PAC proposal

Luminosity

No L00

Ds only


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


Current statusSummary

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 100-200 pb-1 by Summer 2002 and possibly present first results on xs and (maybe) sin(2) on a similar time scale.


Future upgrades

Fermilab is pursuing the goal of accumulating 15 fb-1 by FY 2008

- 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: http://cosmo.fnal.gov/run2b/Documents/TDR/

tdr.pdf

Peak Luminosity

0

50

100

150

200

250

300

350

400

450

FY01 FY02 FY03 FY04 FY05 FY06 FY07 FY08

x10

^30

Integrated luminosity

0

2

4

6

8

10

12

14

16

FY01 FY02 FY03 FY04 FY05 FY06 FY07 FY08

fb^

-1 Total

per year


Future upgrades CDF needs to be upgraded to match this laboratory plan

Run IIA: Lmax ~ 2x1032 and total luminosity 2 fb-1

Run IIB: L max ~ 5x1032 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 MOU’s before this meeting


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 http://ncdf12.fnal.gov/PAC/pac_Nov_01.html


Run IIB PAC review November 2, 2001

Funding available from DOE 2002-2005 is $ 9.1 M Recommendations:

- http://www-cdf.fnal.gov/upgrades/run2b/PAC_Nov01/CDF+D0letterNov01.htm

- 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


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 PMT’s


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

http://ncdf12.fnal.gov/trc/Trc_Dec_01.htm


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 2002-2004 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


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} + 100 kEuro (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: Bacchetta, Neviani, Centro

Power supplies development and production- Cost: 20 kEuro (R&D) + 150 kEuro (1/3 of production)

- Funding year: 20 kEuro in 2002, remaining in 2003-2004

- Foreign Institutions on sub-project: FNAL

- Italian Institutions on sub-project: Padova

- Physicists on project: Bacchetta, Bisello, technical personnel


Run IIB Silicon SVT modifications:

- Cost: 100 kEuro (12 merger boards)

- Funding year: 2003-2004

- Foreign Institutions on sub-project: Chicago

- Italian Institutions on sub-project: Trieste, Pisa

- Physicists on sub-project: Ristori, Belforte, Zanetti at al.


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


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 pt

electrons

Low pt

electrons

e

e


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) + 130 kEuro production

- Funding year: 2002 (R&D), 2003-2004 production

- Foreign Institutions: Argonne, Tsukuba, Michigan State

- Italian Institutions on project: Pisa (with members from Siena), LNF

- Physicists on project: Lami et al.


CEM timing

Motivation: Reduce cosmic ray

background Critical for SUSY

searches which rely on photons

Our eeET had 2 EM object missing timing information!

SM Background estimate of 10-6


CEM timing Examples:

EWK physics: WZ production SUSY searches: N2 G

~~


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: 2003-2004

- Foreign Institutions: Texas A&M, Chicago

- Italian Institutions: LNF

- Physicists on project: Cordelli at al.


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), 2003-2004 (75 kEuro)

- Foreign Institutions: JINR-Dubna

- Italian Institutions: Udine (with physicists from Pavia, Trieste, Roma), Pisa

- Physicists on project: Pauletta, Menzione et al.


Run IIB Richieste alla commissione:

2002: 140 KEuro + 85 KEuro S.J. per CSX 2003-2004: 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

Project Gia'approvati 2002 2003-2004 Totale Totale USDSilicon 30,000 € € 120,000 € 250,000 € 400,000 $353,000

Preradiator € 20,000 € 130,000 € 150,000 $132,375Stereo XFT-Track trigger € 0 $0

EM Timing € 150,000 € 150,000 $132,375CSX € 85,000 € 75,000 € 160,000 $141,200

Event builder € 0 $0Altro € 0 $0Total 30,000 € € 225,000 € 605,000 € 860,000 $758,950


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)

Project Cost US Japan ItalySilicon $11,289,501 $8,666,501 $2,270,000 $353,000

Preradiator $757,009 $343,769 $280,000 $133,240Stereo XFT-Track trigger $623,000 $623,000

EM Timing $399,000 $266,000 $133,000CSX $170,000 $28,000 $142,000

Event builder $538,200 $538,200Total red $12,584,710 $9,548,470 $2,550,000 $486,240

Total $13,776,710 $10,465,470 $2,550,000 $761,240


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 l’interesse 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.

Stato dell’esperimento CDF

Documents

Transcript of Stato dell’esperimento CDF