1. Ferrara 8 june 2004M.Savrié1 Production Readiness Review Ferrara MWPC Production Site

2. Ferrara 8 june 2004M.Savrié2 Agenda 09:30 Introduction: Mauro Savrié 30’ 10:00 panel preparation G.Auriemma 30’ 10:30 Clean room operations: W. Baldini 30’ 11:00 Measurements on panels & D.B.: S.Germani 30’ 11:30 radioactive source test tooling G.Carboni 30’ 12:00 Discussion: 30’ lunch 02:00 we move to the new labs (Polo TecnologicSaragat,1 tel. 0532 974704) and start the visit to the production center 17:00 referees private meeting referees ----- In the old Physics Department: via Paradiso,12 Ferrara

3. Ferrara 8 june 2004M.Savrié3 The PRR has to verify/assess: Readiness of the tooling and of the production site Quality controls and assurance tests Material procurement and its flow Manpower availability Production ( and installation ) schedule

4. Ferrara 8 june 2004M.Savrié4 Production goal: 72 M1R4 (+4) 12 M4R1 (+4) 24 M4R2 (+4) 48 M4R3 (+4) 12 M5R1 (+4) 24 M5R2 (+4) 48 M2R3 (+4) Total chambers: 240 (268) Production foreseen in Ferrara

5. Ferrara 8 june 2004M.Savrié5 EDR recommendations 1.A small ‘pre-production’ series should be constructed and tested for each chamber type … …… the goal was to build and test 3 final M2R3 chambers and to test at least one in LNF with the radioactive source: we succeeded in building 2 of them, but due to time shortage, and many other commitments (…and a small accident…), only 2 were (nearly) built 2. At least one of these pre-production chambers of each type should have undergone a successful ageing test … ……actually we have never tested our prototypes for ageing. We could perform a test in the near future at the GIF on the first chambers 3. The opening of the chambers should be exercised. In fact, the reviewers are mostly worried about the proposal to close two of the three chamber types by gluing… This has been already discussed in past

6. Ferrara 8 june 2004M.Savrié6 4.A wire replacement procedure should be defined and tested for each chamber type. ….we exercised the procedure several times on a M4R1 prototype and with a M2R3 “like” prototype. The tooling is already “designed”: it has just to be implemented (adapted) to the new site. 5. At nominal gas flow rate, the eventual formation of ‘pockets’ should be checked by efficiency mapping, especially in the case of the longest chamber type. ……the general design of the chambers is the same as for LNF where this problem was already discussed and “understood”. 6. As the gap size is probably the most critical parameter for pulse height uniformity, an effort should be made to produce panels of best possible flatness. ……..in fact we still see some problems but in a very small percentage of the panels ( see Stefano presentation)

7. Ferrara 8 june 2004M.Savrié7 7.The sagitta of the panels due to wire tension should be measured, for those panels carrying wires only on one side. ……it was already discussed and understood at LNF PRR but…… (see wander presentation) 8.The precision of the wiring should be checked on all pre-production chambers …… we do already for all the wired planes 9.Gluing should be handled with the utmost attention, with well tested, constant procedures, in particular under <50% humidity … …… the humidity control is very effective and the gluing procedures are already automatic and controlled by PC apart for the closing bars ( we are finalizing the code for the assembling table). Side bar gluing will be manual for all chanbers 10.Chamber materials and components (panels, bars, wires, glue, resistors and capacities…) should be identical as much as possible for all chamber types. ……largely achieved (already discussed at CERN and LNF PRR)

8. Ferrara 8 june 2004M.Savrié8 11.A well-defined testing procedure during production should be established with the pre-series, including some final two weeks of operation at nominal voltage with final gas mixture and flow. ….. It is in our program. For the first chamber we have still a big gas leak to be understood. HV test on each wire plane was successfully done ; HV test foreseen. 12.On the basis of the experience gained with the pre-production series, the production schedule should be re-evaluated....we still have to experience the “real pre-production”, but we are quite confident in the proposed production schedule

9. Ferrara 8 june 2004M.Savrié9 Operations to be performed In Ferrara Production Center(1/2) A.Outside the clean areas 1.Measurement of the height of the HV bars with respect to the cathode surface: On all the “pre-prduction” panels, On 10% of the production panels ( if pre-production is O.K.), 2.Cleaning of the panels, visual check,check of the gas connections and the good geometry of the corners; B.Inside the grey room 1.Soldering of ground copper tapes on panels (in future it will be done in Potenza); 2.Final cleaning with isopropyl alcohol;

10. Ferrara 8 june 2004M.Savrié10 Operations to be performed In Ferrara Production Center(2/2) C.In the clean room 1.Wiring, gluing and soldering of wires 2.Pitch measurement 3.Side bars gluing 4.Wire cutting 5.W.T.M. & HV test in open air on sigle panels 6.Chamber assembling D.Outside the clean areas 1.Gas leak test 2.Mounting and soldering OPB cards 3.H.V. Test and conditioning The chambers will be sent in Roma2 for the final assembly (electronics and Faraday cage) and test with cosmic rays ( X%?) A test with a radioactive source is foreseen in the near(??)future on all chambers ( see Carboni presentation )

11. Ferrara 8 june 2004M.Savrié11 10.5 m 9 m Class 100.000 Class 10.000 Class 100.000 Grey room Clean room Cosmic station Rack electronics Gas Control rack table shelf 10 m 12.5 m

12. Ferrara 8 june 2004M.Savrié12 People 1. Staff physicists Mauro Savrié Wander Baldini Ferruccio Petrucci Alberto Gianoli 2.Staff technicians Federico Evangelisti Luca Landi Claudio Pennini Claudio Padoan 3.Non staff technicians Stefano Squerzanti 4.Levan Glonti ( Dubna) 5.Phd & others Stefano Germani New Post doc ( 2+1 years) Student...soon

13. Ferrara 8 june 2004M.Savrié13 Material flow to Ferrara Production center(1/3 ) 1.From Potenza Panels ready for wiring with: HV bars with components and anti-corona coating Signal/gnd connectors Gnd copper tape already soldered on both side of the panel 2.From LNF Side bars Closing bars Spacers and plastic rings Gas connectors HV distribution plastic bars OPB cards HV wire with pins Chamber labels

14. Ferrara 8 june 2004M.Savrié14 Material flow to Ferrara Production center(2/3) 3.From CERN 30 microns wire 100 microns wire Adekit 145/400 with mixers ( black ) Adekit 140/50 with needles (clear) 4.We buy by ourselves: Tin Adekit 145/400 with mixers Adekit 145/50 with mixers Mylar adhesive tape Any other stuff ( syringes, needles…)

15. Ferrara 8 june 2004M.Savrié15

16. Ferrara 8 june 2004M.Savrié16 Material flow to Ferrara Production center(3/3) 1.Panel supply First delivery problems:  planarity (?)  Gluing problems  H.V. Bar “A type” where too high..now is O.K.  Not very goog surface quality.... now is O.K.  No signal connectors  Problems with gas path Second delivery: 7 panels ( top covers )  Good quality Third delivery: 4 panels  Some bad planarity and local defects  1 H.V. bar was detached 2.Material supply: O.K. 3.Essentially we just started the “learning stage” of the production Problems

17. Ferrara 8 june 2004M.Savrié17 Preliminary panel preparation

18. Ferrara 8 june 2004M.Savrié18

19. Ferrara 8 june 2004M.Savrié19 Wiring, Gluing, Soldering & WPM All the timings refer to the largest chambers we have to build Glue pre-curing 1 person: WGS machine 1 person: panel preparation & tests 1 person: chamber assembling 1 person: wire cutting/WTM/side bar gluing

20. Ferrara 8 june 2004M.Savrié20 Chamber Assembling Wired Panel Preparation

21. Ferrara 8 june 2004M.Savrié21 Gas Leakeage test Flow in from the bottle Requirements: 5 mb overpressure (p 0 +5mb)  P<=2mb/h it is done outside the clean areas Differential manometer

22. Ferrara 8 june 2004M.Savrié22 Conclusions and worries 1.We already started but we still need a training period 2.Production of two panel/day is feasible but with no margin: Time contingency in gone Possible failure in the tooling  We have spare parts for quite everything but the “Marsilli”  We are considering the possibility to prepare a spare tensioning system “LNF/Firenze like” Lack in material supply (as in recent past) Not so good quality of the material Maintenance of the tooling Maintenance of the Clean Room ( general cleaning, replacement of the filters) Time to switch from one chamber type to another 3.Recovery could be possible only having some more man power 4.Two years production it is a very long time to go! To maintain the production rate For production quality