Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 1

Status of the FMD Status of the FMD

Børge Svane Nielsen

Niels Bohr Institute

FMD 1 FMD 3FMD 2

Outer ring

Inner ring

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 2

Test beam resultsTest beam results

680 MeV e- beam test at ASTRID ring,Aarhus University, DK

5 FMD modules(5120 channels)

e- beam

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 3

FMD3 coneFMD3 cone

FMD3 support cone alsosupports the beam pipeby 4 tensioned wires

Test with final coneand wire mechanism shows <10 umdeformations.

Mock-up beampipe supportring.

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 4

Digitizer cards and RCU bus cables

Digitizer cards and RCU bus cables

Digitizer cards on detectorbased on TPC FEC design,(designed at NBI)

3 ALTROs + Board Contr.

2 versions (inner, outer)

3 m bus cable to RCU gavemany problems, until wechanged from 40+50‘standard’ ALTRO busto 50+80 twisted pair cables.

40 bit signal + 10 grounds

40 bit signal + 40 grounds

adaptor

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 5

Test after assemblyTest after assembly

Noise

0

0.5

1

1.5

2

2.5

3

1 4097 8193 12289 16385

Strip (x4)

AD

C c

ou

nts

Test of noise (pedestal width) for half inner ring (5 modules, 5120 strips) after final assembly

Pattern understoodfrom strip andprinted circuit lengths

All S/N above 20

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 6

FMD2 supportFMD2 support

IP

FMD support is a relatively simple carbon fibre sandwich structure cylinder.

Mounting flap

Honeycomb detectormounting plates

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 7

Assembly of FMD3Assembly of FMD3

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 8

Completed FMD3Completed FMD3Both halves of FMD3 Both halves of FMD3 were completed last weekwere completed last week

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 9

… and then FMD2… and then FMD2

Both halves of Both halves of FMD2 to be/were FMD2 to be/were completedcompletedthis morning this morning

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 10

ConclusionsConclusions FMD3 and FMD2 detectors ready to ship tomorrow Very small rate of single strip failures (<<0.1%) Signal/noise well above TDR value Commissioning with final power supplies, DAQ, DCS and Trigger starting next Monday at Point 2. Installation mid-April (FMD3) and early May (FMD2)

½ FMD3

½ FMD2(without detectors)

Technical Forum, 8 March 2007 Børge Svane Nielsen, NBI 11

… at CERN… at CERN

Ongoing: cabling of FMD3

Arrival of detector at P2: Saturday

Starting next week: commissioning in TPC clean room at P2 - CAEN HV available - CAEN LV should arrive next week - temporary cooling system

Installation April 23rd (FMD3) - need to work out access - area should be cleaned