Stefano Lami 1

CSN1 - Sep 24th, 2003

CDF

CDF Preshower/Crack Detector Upgrade

(CPR2)

Replace old CPR and CCR (slow wire chambers) with detectors based on scintillator tiles read-out by WLS fibers, to maintain Run I capabilities

faster + finer segmentation in space

Argonne National Laboratory FNAL INFN (Pisa, Roma1, Pavia,

Trieste, Udine) JINR (Dubna) Michigan State University Rockefeller University University of Tsukuba

Stefano Lami 2

CSN1 - Sep 24th, 2003

CDF Physics with the CPR2

Preshower used in >100 papers, about 1/2 of all Run I publicationsHigh Pt Electron IDSoft Electron b-taggingPhoton Background Subtraction (the only

model-independent 0 subtraction above 35 GeV)

High PT Electrons

Pion Backgrounds

Electrons

Number of MIPS

Crack Detector detects photons in cracks that generate “fake” missing energy.

Inst L = 2-3 E32 causes significant degradation of current detector with 20-30% occupancies

Even with L<1 E32, segmentation of upgrade opens new window for improving jet energy resolution

Stefano Lami 3

CSN1 - Sep 24th, 2003

CPR2 Overview

Scintillator tiles

Total n. of channels = 3,072 CPR tile: 12.5 x 12.5 x 2 cm 2x3 ()/tower CCR tile: 22.5 x 5 x 0.5 cm 1 tile/tower Photomultipliers

16 channels per PMT (R5900) 192 HV channels CAEN HV SY527

Preshower Detector (CPR)

Wedge Total

CPR 54 2,592

CCR 10 480

Crack Detector (CCR) Preshower

48 modules in front of CCAL

12.5 cm

12.5 cm

2cm

Splicing WS/CF

~5 m

WLS fiber into groove, spliced to clear fiber at tile exit, routed to optical connectorWe want to see MIPs in CPR, >5 pe at PMT in specs, i.e. >10 pe at tile exit (splicing + connector + 5m clear fiber)

Stefano Lami 4

CSN1 - Sep 24th, 2003

CDF Italian Contribution

Major italian contribution to R&D of tile/fiber system (concluded)•Comparison of :•BICRON, Dubna, MINOS tiles•PolHiTech, Kuraray Y11 WLS fibers•Groove path into tile•Optimal number of fiber loops•Fiber/tile optical coupling choosen Dubna-PolHiTech

~30 pe/MIP

Dubna tile + glued mirrored PolHiTech fiber (4 loops) + Tyvek wrapping

Cosmic ray test

Stefano Lami 5

CSN1 - Sep 24th, 2003

More tile/fiber R&D results:

Check optimal number of fiber loops, from 1 to 7, light yield reaches a plateau for N=4.

Difference between sigma and circular groove path within +/- 5% (for both light yield and uniformity).

Mirroring the fiber edge not readout is important.

Glue (BC-600): light yield >40% than in air, no decrease in time observed.

4 loops seems best option

CR tests on Bicron 5mm thick scintillator tiles for Crack detector gave ~ 7pe/MIP with mirrored fiber (straight groove)(OK, we measure showers in CCR)

Stefano Lami 6

CSN1 - Sep 24th, 2003

CDF CPR2 Assembly Time Schedule

Time schedule did not change: hardware assembled by Nov ‘04

Milestones

Assembly and test first CPR prototype Apr 03 (done)

Purchase first 40 PMT’s (Japan) Aug 03 (done)

Purchase Scintillator (Italy) Aug 03

Purchase Optical Fibers (Italy) Aug 03

Purchase HV system & cables (Italy) Oct 03

Preshower Detector Assembly Nov 04

Prepare fibers and tiles Apr 04

End of assembly Sep 04

Quality control Nov 04

Crack Detector Assembly Aug 04

Stefano Lami 7

CSN1 - Sep 24th, 2003

CDF Installation in the Collision Hall

With help from the CDF Operation Managers, we developed a draft plan to install the Preshower/Crack detectors without a rollout, in 10-12 weeks.(First presented at FNAL Program Management Group meeting on August 26th)

Estimate based on 1 shift/daywith an 8-man team.

Could be faster (6-8 weeks) with 2 shifts/day(but up to 2 weeks for North arches pull out – same back).

Contribution from Italian technical personnel

Stefano Lami 8

CSN1 - Sep 24th, 2003

CDF Construction Plans

Still premature to reschedule short shutdown installation, but 1st CPRprototype suggests assembly could be reduced by two months to be ready for possible 2004 end-of-year shutdown.

• Ready to purchase parts (either way must arrive by March 2004)• For the detector construction INFN buys:

CPR Dubna Scintillator (finished tiles, first after ~3months, total of 4-5 months) CCR BICRON Scintillator PolHiTech WLS and Clear fibers (~2months production)

Order Scintillator by Oct 03 and Fibers by Dec 03

INFN assembles half (24) of CPR modules (remaining CPR-CCR by Argonne) and participates in quality control tests.

Stefano Lami 9

CSN1 - Sep 24th, 2003

CDF CPR2 Funding

Financial summary: Total according to May02 plan: 202 k€

Prototyping 20k€ (funded in 2002/03)Scintillator 80k€ (funding in 2003/04)Fibers 45k€ (funding in 2003/04)HV & Cables 57k€ (funding in 2003/04)

Total SJ for 2003: 100 k€

Asking for total funding of Italian contribution to CPR2

Stefano Lami 10

CSN1 - Sep 24th, 2003

Backup slides

Backup slides

Backup slides

Backup slides

Stefano Lami 11

CSN1 - Sep 24th, 2003

CDF Italian Participants

INFN Pisa S. Lami A. Menzione

Univ. of Siena R. Paoletti A. Scribano N. Turini

Roma 1 M. Iori

Univ. Trieste/Univ. Udine A. Penzo G. Pauletta

INFN Pavia G. Introzzi

Stefano Lami 12

CSN1 - Sep 24th, 2003

First Preshower module assembled last April.

Completed in 12 hours, alternating 2-man teams. 4 months for 48 modules(Fiber preparation not included: - Mirroring ~2 weeks - Splicing ~1 month (140/day)) 6 months in total (very conservative)

But mass production can be faster (3 months assembly possible, it is 5 in official schedule).

Dubna Tile

Tyvek wrapping

Stefano Lami 13

CSN1 - Sep 24th, 2003

CDFCPR2

Responsabilities

Total CPR2 Upgrade Cost = 900K $

Half from Japan (240 PMTs) and Italy (Scintillator,Fibers,HV)

USA (ANL, FNAL, Michigan, Rockefeller) Design, R&D, assembly, test

Italy Design, R&D, CPR assembly/test

Russia (Dubna) CPR Scintillator grooved tiles

Japan (Tsukuba) Multianode Phototubes

Stefano Lami 14

CSN1 - Sep 24th, 2003

CDFConstruction Plans -

2

• Ready to purchase parts (must arrive by March 2004)• For the detector construction INFN buys: CPR Dubna Scintillator (finished tiles, first after ~3months, total of 4-5 months) CCR BICRON Scintillator PolHiTech WLS and Clear fibers (~2months production)

Order Scintillator by Oct 03 and Fibers by Dec 03 CPR plans

Ship tiles to ANL and fibers to FNAL for splicing and mirroring

Send technicians and Physicist to ANL to build the equivalent of 24 modules (6 MU)

Tests

- Test single glued tiles with CR

- Scan every module at ANL using source scanner by MINOS

CCR detector Buy tiles from Bicron

• Cutting and polishing at FNAL

• Groove milling (linear) at FNAL

Buy all WLS and clear fibers from PolHiTech

• Ship fibers to FNAL for splicing and mirroring

ANL builds all Crack detector

Stefano Lami 15

CSN1 - Sep 24th, 2003

Installation:

Easy access to

South arches once

North arches pulled

out – under solenoid.

8-man teamAfter removing bottom

wedge old modules and

installing scaffolding

instead,

3 men/arch on same

side replacing CPR,

CCR modules,

2 men carrying

old/new modules.Design for new studs/brackets under preparation, will be tested on spare Central Calorimeter wedge (new modules ~100 lbs each, heavier than old ones)

South arches(constrained by tunnel)

Removable wall

Stefano Lami 16

CSN1 - Sep 24th, 2003

CDF HV System Costs

1 CAEN SY527 14k€

9 A938AN cards 30k€

216 RG-58 cables 7k€

SHV, AMP connectors 6k€

Total 57k€

Stefano Lami 17

CSN1 - Sep 24th, 2003

CDF Missioni

Assemblaggio ad Argonne (estate 2004)

1 fisico, 2 tecnici

per 2 mesi

6 MU

Test ad Argonne

(settembre 2004)

2 fisici per 1 mese 2 MU

Installazione in CDF

(fine 2004 ?)

1 fisico, 2 tecnici

per 2 mesi

6 MU

Totale 14 MU