roma 17 maggio 2005tilecal 1 tilecal status report stato dell’esperimento responsabilita’ di...

Roma 17 Maggio 2005 TileCal 1

Tilecal Status report

Stato dell’esperimento

Responsabilita’ di Pisa

Attivita’ in corso: commissioning, calibrazioni, analisi difisica

Richieste


Commissioning is being done by all Institutes: F/E electronics, bus, HV, LV etc. Move to z=0 +final alignment based on survey data for tiles+LAR ~25 Aug. 05.

Barrel installation completed on 10/12/2005

10 Dec 2004


F/E electronics tests with Mobidick

September 2004

Concerns last certification tests of the individual FE Drawers,before Commissioning (using the local portable Test Bench MobiDICK).All elements are tested, including cooling circuitry + fibers (with pulse LED)

All drawers installed in the Barrel, few channels still to be fixed. Still on the critical side: LV.


Use MOBIDAQ:-on truck + temporary cables-At Z=0 with final cables

MOBIDAQ in USA15

TTC & GLINK fibers

CANbus patch panelMobiDAQ

Row 16 Row 19

12

3

F/E electronics tests with MobiDAQ

USA15

Tests of the complete system on 8 modules at time: SD, buses, CIS, Laser, HV, LV... Use of the online Monitor for immediate diagnostic and offline analysis

MobiDAQ is also used for preliminary Cosmic Runs.


Fingers and drawers


Fix a drawer


Trigger boards QDC for the trigger

CCT with S-links for the digital readout

TTC modulesMobiDAQ


MobyDAQ: sample of results

Pedestal rms (noise)

CIS scan (gain)


Cosmic Ray Tests (preliminary now at 185)

Tile Barrel lower modules

Special 9U VME, FPGA programmable6 Super Drawer/unit

Use MobiDAQ and temporary trigger logic, Online Monitoring + Offline analysis


AT

LA

NT

IS

Geo

Mod

el

Allows: -Check for dead-channels -HV-Cesium equalization- Compare with Tbeam data

Cosmics: first results

Rates in UX15: 130 /h (TileCal)


Cosmics Runs, Energy (pC) for the B-Cells(Check dead channels)


Main steps for barrel:

•until end Aug: Installation and commissioning WPs standalone in USA15/UX15

•7-29 September: cables/fibers/pipes installation to the fingers rotating in sectors every 2 days (8 fingers/day) with several teams (TC contractor, Protvino, CF, LIP, tile techs pool+…..

•9 Sept->16 November : install LV, commission 8 fingers at the time rotating in sectors every 6 days (2.7 fingers/day) with MOBIDAQ,ROD DAQ (if available) and MOBIDICK when needed.

•16 Nov-7 Dec: commission the 2 barrel partitions (~5000 channels) with ROD DAQ

•The EBC and EBA will follow during end 2005, first half of 2006

Overall commissioning scenario


Organization

We have started a reorganization of TileCal defining things to be done (Work Packages) and responsabilities, hopefully to improve on the efficiency.This process has now converged.

In this scheme Pisa is well represented at all levels.


TileCal Organization (1)


Activities in Pisa

•Laboratory tests (PMT)•Simulation•Analysis


Tests in Pisa: PMT long run tests (G. Usai)

Test of stability of PMT operating in LHC environement for 1-2 years at full luminosity.


Sample of results being obtained

Stability (Am)

GainI-dark

Quantum eff.

We are still debugging. Most of the problem solved.• Am source is “old” • Poor room temp. conditioning• Some channels look “weird”

One measurement lasts 12 h light is setting: Qpmt = 50 CIncrease light to MB at LHC

Time


Other ongoing activities:•On Line Monitor (Chiara, Andrea, Paolo); Chiara Roda coordinates the effort of a group of physicists from various subdetectors. The work started as an OnLine monitor for TileCal TB, evolved as “GNAM” at the CTB and now looks as a promising approach to a “low level” monitor for many sub detectors for ATLAS. GNAM is now a package of the standard TDAQ software. Chiara participates to the monitor working group of ATLAS.•monitor snapshot•TileMuId (G. Usai); the work continues in collaboration with muon community. The method of tagging muons with TileCal is a standard and well debugged tool in Athena and HLT and is evolving as a method for

•Isolation of muons in the calorimeters•Recovery of muons large energy losses

•Comparison G4/CTB (Andrea, Anna) has made large progresses and should be near to the end.•“Real Detector Simulation” in G4 (Anna)


Comparison CombinedTB - Geant4 (A. Dotti)

pions in LArg+Tile

• Pions at= 0.35, Ebeam =20 - 350 GeV

• Data calibrated at e.m. scale• Tested some methods of energy reconstruction in LArg • Fixed few little bugs (now in Athena version 10.0.2)• Now agreement in energy reconstruction is within 5%

(Ebeam = 20 - 350 GeV).

• Works on shower shape still going on.


Energy distribution Ebeam = 180 GeV

180 GeV =0.35

LArg

TileCal

LArg + TileCal

E (MeV)

E (MeV)

E (MeV)

Ent

ries

(A

.U.)

Ent

ries

(A

.U.)

Ent

ries

(A

.U.)


Mean reconstructed energy

G4 DATA

Rec

o E

(G

eV)

Eda

ta /

EG

4

±5%

E Beam (GeV)

E Beam (GeV)


20 Gev 50 Gev

100 Gev 200 Gev

We can do better! Using weighting techniques on CTB data (Chiara, Iacopo, Andrea)

i

iiii E

baEw )(

The energy of cell i is weighted:

a, b are obtained by minimizing:

e beam

beamii

E

EEw2

Linearity Resolution

RawCorrected


This activity comes along with the Jet Energy reconstruction/calibration (Chiara, Iacopo).

Calibration of DC1 dijet (QCD) sample has been done, in progress the work on the “Rome-layout” production.

Few methods of jets reconstruction (cone, kt, topojet) and then recalibration.

Results of our method: linearity +-2% (0.02-4 TeV) resolution improves by 15%

The package is now a standard method in Athena.


Physics analysis.Two analyis to check the possible use of a LVL2 “b-tagger” (FASTRACK a la CDF or battery of CPUs).

•pp->j+Z+X with Z->bb (b-tagged jets); if possible to trigger on this channel it would be the ideal way of calibrating the b-jets.

•pp->bb+A/H with A/H->bb (3/4 b-tagged Jets); this is a standard discovery channel of the supersymmetric Higgs.

In both studies the b is assumed to decay hadronically and be identified by impact parameter.

The advantage is the BR, the disadvantage is the tag efficiency, mistags.

•pp->Hqq +X with H->


Signal QCD

LVL1 RateKHz

- 4.9

LVL2 RateHz

- 98-10

Kin. Sel+2bfb

1098 195000

80<Mbb<100

fb

551 21100

Jet+Z->bb (V. Cavasinni and I. Vivarelli)

S/B S/√B30 fb-1

2.5% 20.6

Needs to lower the jet thresholds to have sidebands for bknd subtraction, hence reduce the rates at LVL2 by fast tagging b-quarks.


pp-> bb+A/H->4b (3/4 tagged) (V. Cavasinni and I. Vivarelli)

Selection εS εB S(30 fb-1)

B(30 fb-1)

S/B S/√B

Official ATLAS HLT menu

0.11% 1.6 10-9 140 4630 3.0% 2.0

Improved multijet trigger

1.1% 1.3 10-8 1380 36850 3.7% 7.2

The proposed trigger allows to have a factor 10 more statistics.

To avoid too large QCD rate it needs fast b-tagging.

It is a counting experiment where the new scheme of triggering can improve the significance over the standard trigger menu.


ATLAS light HIGGS discovery potential at 30 fb-1

• Vector boson fusion qqHat least one decaying leptonically) fundamental at masses 120-140 GeV.


HVBF hhF.Sarri, V. Cavasinni, I.Vivarelli)

In this channel we have an additional huge background from QCD:

fbhhBRHBRVBFsig 125)()(

11103.1 QCD

sig

Fundamental the algorithm to identify ’s/reject QCD jetsUse the results of the Milan,Freiburg groups: D. Cavalli, M. Heldmann


“Hard” cuts

HVBF hh signal vs QCD backgroundpreliminary


“Soft” cuts

HVBF hh signal vs QCD backgroundpreliminary


Richieste

• Un nuovo dottorando: Paolo Adragna

• Richieste MI: 5 KE per riunioni ATLAS-It, riunioni per Monitor, Roma Wshp etc.

• Avuto 8KE speso ad Aprile 3KE.

• Richieste ME: 12 mu.

•Avuto 90KE speso ad Aprile 37KE ma:

• 7mu (30KE) di installazione (tecnici), promessi alla collaborazione saranno utilizzati a Settembre. Ci rimane per metabolismo 20KE.

• Ci viene richiesto di mantenere un fisico sempre al CERN per il commissioning. Vivarelli e’ al CERN con resonsabilita’ di test finali del Barrel (MobiDAQ). Al commissioning dovremo partecipare anche con altri fisici.


Test procedure with MobiDAQStep Task Description for commissioning in sectors (8 SD at the time) Duration

0 Connecting cables (With temporary cables & local LVPS takes several hours…) 30 min

1 Running diagnostic package in DVS

• Tests using CANbus done successively for each SD

• Other tests can run in parallel for 8 SD

• Errors displayed automatically and stored in logbook.

• In case of errors check : LV, disconnected cables, etc...

• If no success, use Mobidick near finger for repair and retest.

• Meanwhile bypass daisy chain+ go to Step 2 for other SDs.

30 min

2 long term stability runs “a la test beam”

• 3 independent runs for: pedestal, CIS, laser

• On-line Monitoring provide summary histograms

• More detailed histograms available if problems detected

• Histograms saved locally (which database?)

• Runs can be analyzed offline using Athena

Several hours (if needed)

FE electronics tests with MobiDAQ


Back

Energy in a cone around a tagged muon (G. Usai)

Cone radius


1) Mean value for CIS signal as PMT function2) Distribution (48 PMTs) of mean value for CIS signal3) Distribution (48 PMTs) of rms for CIS signal4) Signal Timing as PMT function (no corrections applied)

1

2

3

4

BackBack


Tile Muon Trigger Set-Up (june 2005)

• The tile muon trigger will take advantage of the output of the trigger towers (used later for LVL1, sum of the signals of all cells in one tower).

• One trigger tower covers ∆ηx∆φ=0.1x0.1, readout for the tile muon trigger via Chicago coincidence boards (see later) up to η<0.8.

– For 0.8<η<1.0 there are still some cells in the first samplings. They could be included into the trigger by changing a patch panel (now the Chicago trigger boards read only 8 towers in 1 mod.)

• Each trigger tower will provide a signal. Coincidence with back to back tower. NIM signal. • 4 boards will be produced to read out 24 modules (12 on the top and 12 on the bottom)

Expected rate:130/hTest equalization, timing,...

roma 17 maggio 2005tilecal 1 tilecal status report stato dell’esperimento responsabilita’ di...

Documents

tilecal organization

reorganization of tilecal

barrel installation

certification tests

usa15fe electronics

mh tilecal cosmics

barrel partitions

cosmic ray tests preliminary