09/07/2002 1Muon Meeting

Status of MWPC activities at CERN and PNPI

Outline:• Module 0 status and plans

– M3R1 (CERN)– M3R2 (CERN)– M3R4 (PNPI)

• Tooling status and plans– Wiring machine– Glueing station– Wire pitch measurement– Wire tension measurement– Soldering station

• Production areas at CERN and PNPI are in a well advanced state

09/07/2002 2Muon Meeting

M3R1 chamberStatus:• Design finished (Thomas Schneider)• Material preparation (PCBs) ongoing• Construction planned for August• Testing begin September (?) or October

->Unfortunately chamber is not really a module 0 due to pending problems, in particular on chamber closing.

->As we want to be able to reopen, there is no simple alternative to the O-ring, due to many connectors and the small gaps (otherwise we might have switched already to an alterntive solution. . . )

-> Chamber will be still made with honeycomb panels (of 10mm total thickness), due to alignment issues to be sorted out, a tight schedule and difficulties to get foam panels done in Italy in August.

->We are considering to put the loading resistors into the gas gap (suggestion of Seva).

09/07/2002 3Muon Meeting

M3R1 chamber

09/07/2002 4Muon Meeting

M3R1 chamber

09/07/2002 5Muon Meeting

M3 R2 and R4 chambersStatus M3 R2:• Design of M3R2 chamber planned for August• Material preparation and construction in September• Test in October

Status M3 R4 (tbc by Alexei): • Design done by A.Saputi / B.Botchine• Material preparation done by LNF group• Construction planned at CERN in September (Tooling for PNPI -in

preparation at CERN- should be used)• Test in October

->Schedule for both chambers is tough, we have to push

09/07/2002 6Muon Meeting

Status of Tooling Preparation

Wiring machine:• Wiring machine for PNPI under construction at CERN

(Raphael+PNPI technicians), following closely the design of the CERN wiring machine.

09/07/2002 7Muon Meeting

Wiring Machine (ctd)

Modifications:• Have both belts on the same side

(simpler transmission)• Introduce electromagnetic clutch to

facilitate start of the wiring process• To be decided still:

Implement tension measurement? Torque motor has still to be ordered

-> Be ready end of August

09/07/2002 8Muon Meeting

Glueing Tables

Status: • First glueing table has been finalized• Need to decide on exact positions of spacers for

glueing frames of Module 0

09/07/2002 9Muon Meeting

09/07/2002 10Muon Meeting

Wire pitch measurement

Status:• Hardware for first station ready (Michał, Raphael)• Software (LabView)

well advanced, should be ready this week

(Rebeca (SS)).

09/07/2002 11Muon Meeting

Wire tension measurementAcknowledgement:• Visit of A. Nedosekin in May was very useful to understand hardware and software of

the KLOE/ATLAS WTM-system !

Status:• 16-channel system could be purchased via LNF, but contains obsolete components (long

delivery time) and it is rather expensive (~10kCHF).• We investigated about adaptation of the system to up-to-date hardware (NI-DAQ 6602). ->First tests show that it is feasible (Michał and Anatoli)

DAQ-cardTTL-disc.LC-generatorHV-modulator

HV-PS Wire Chamber

09/07/2002 12Muon Meeting

Wire tension measurementPlan: • Use 2 NI-DAQ 6602 cards (8 channels each).

– 1 channel will be pulse generator (to scan frequencies around resonance) – 1 channel will be used for gate generation (to define measurement cycle)

-> 14 channels left for measurement• Each DAQ-card will have adapter card with TTL discriminators and

switch• A mother board with HV-modulator and LC-Generators (from LNF)

will be prepared->Prototypes and schematics done by Anatoli, layout will be done this

week by Giacomo Chiodi• Use external HV power supply (400 V)-> Software adaptation done by Michał and Rebeca

->6 (14) channel system is hopefully functional by mid August

09/07/2002 13Muon Meeting

Soldering Station

Plan: • Follow as closely as possible LNF station, and adapt it

to the multipurpose scanning table• 2 heads are planned for PNPI table, 1 for CERN table

(small chambers)-> Setting up planned for September/October