1. QA/QC in MM SM1 Mod 0 Production at INFN QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20151

2. Production Workflow (from J. Giraud) QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20152 Individual components Read Out panels Drift panels* Module assembly Drift panels* + Mesh + Frame + drift spacers & & & & Validation of items:  check if all main parameters fulfill the requirements * External & Internal drift panels Main checks occur also during each main step (except for individual components) But all parameters cannot be checked (reached) at the end of main steps RO panel validation Drift panel validation Drift panel ++ validation Individual components validation 2 1 3 4

3. INFN Workflow for Mod 0 QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20153 The blocks in the Giraud scheme are, in our case, localized in different places: Drift Panels are made in Roma1 (1) RO Panels are made in Pavia (2) Mesh stretching is done in RomaTre (3) Mesh gluing and final assembly at LNF (3+4) The “Individual Components” are inside the other blocks This study is really very preliminary and is “in nuce” the idea for a costruction manual, for this reason we also include some of the visual control that are tipical in a costruction check list.

4. Drift Panels in Roma1 QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20154 QA/QCTechniqueReadiness Material Control PCB Dimension The idea is to get a full set of frames for one panel, measure them in a 3D machine, set them as template to test all the other frames and the PCB. End of February PCB, Frames and Honeycomb thickness Use caliber like Mitutoyo (available in Roma). We can check about half of the total PCB and Honeycomb surface. Ready Panel Construction Procedure Control Material CleaningVisual inspectionReady Glue QuantityGlue Dispenser (ordered)End of February Components PositionExternal tool (in construction)End of March Vacuum pressureElectronic controllerReady Panel Check General checkVisual inspectionReady Planarity/ThicknessLaser Tracker (at LNF)Ready Gas TightnessSystem under development by Cosenza PeopleEnd of March

5. RO Panels in Pavia QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20155 QA/QCTechniqueReadiness Material Control PCB Dimension The idea is to get a full set of frames for one panel, measure them in a 3D machine, set them as template to test all the other frames and the PCB. End of February PCB Precision holes?? PCB, Frames and Honeycomb thickness Use caliber. We can check about half of the total PCB and Honeycomb surface.Ready PCB Electrical Insulation Check resistance at High Voltage (about 500V) between copper and resistive strips using a Giga Ohm-meter. Ready/To buy Panel Construction Procedure Control Material CleaningVisual inspectionReady Glue QuantityGlue DispenserReady Components PositioningExternal tool (in construction)End of March Stiffback control?? Panel Check General checkVisual inspectionReady Planarity and ThicknessLaser Tracker (at LNF) without contact.Ready Gas TightnessSystem under development by Cosenza PeopleEnd of March Alignment of RO strips Using the Laser Tracker it is possible to check the positions of the reference points on both side of the Panel. Must be done with the panel in vertical. Ready Precision pin/insertPrecision ruler with the granite table as reference…in progressR&D

6. Mesh RomaTre + LNF QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20156 QA/QCTechniqueReadiness Material Control RM3 Check if damagedVisual inspectionReady Mesh Stretching Procedure Control RM3 Mechanical TensionStrength gauge stretching system + Tensio-MeterEnd of January Mesh gluing on the transport frame RM3 General checkVisual inspectionReady Mesh Cleaning How to clean? How check if it is clean?…in progress… R&D Mechanical TensionTensio-MeterReady Holes for interconnection? When do the holes? Now or after the gluing on the drift panel?R&D Mesh on the Drift Panel LNF Mesh Frame thickness and hole position Use caliber like Mitutoyo for the height and a set of reference frames for the holes position End of February height wrt drift panelUse caliberReady Mesh gluing Check glue quantity to use (experience to do with the INFN prototype in one or two weeks) R&D Mechanical TensionCannot use Tensio-meterR&D Mesh cleaning again?Cleaning now can cause risk of damage on the drift panel…R&D Electrical Insulation mesh- drift plane Giga Ohm-meter used at about 300VReady Electrical Connection with Drift Frame Good Volt-meterReady

7. Chamber Assembly LNF QA/QC MM SM1 Mod 0 - G. Maccarrone 19-Jan-20157 QA/QCTechniqueReadiness Material Control PanelsVisual Inspection (all the test are already made)Ready Gas gap frame Use caliber and reference set to check holesEnd of March O-Ring Visual inspectionReady Chamber Construction Procedure Control Single Gas Gap Working Test Check leak current at High Voltage (about 800-900V between resistive strips and mesh) using a Giga Ohm-meter, or an high current resolution HV PS, better then 1nA Ready/to buy Chamber Check General check Visual inspectionReady Planarity and Thickness Laser TrackerReady Alignment of RO strips Using the Laser Tracker should be possible to check the positions of the reference points on all (to be verified) RO PCB. Must be done with the panel in vertical. Ready Deformation vs. Pressure Laser TrackerReady Gas Tightness Pressure drop vs. timeReady Cosmic TestFE Electronics is the crucial pointReady