Single Phase ProtoDUNE TPC QA/QC Plans The SP TPC Team Jan. 13, 2016

QA vs. QC Quality Assurance is process oriented and focuses on defect prevention, while quality control is product oriented and focuses on defect identification.

QA Program Integrate QA into the system design process  Design features that facilitate acceptance tests Define realistic tolerances on all components based on scientific requirements and fabrication limitations  In case of conflict, design features to minimize performance impact Automate key processes to minimize production variations and errors  Wire placement, wire tension control, wire tension measurement  Use commercial available components when possible Clearly define interface agreements  Cryostat, cryogenic system, photon detectors, cold electronics, beam window  All key TPC components are designed with close collaboration with the installation WBS

QA Program, cont. Lessons learned  From MicroBooNE: intermediate wire support, evaluate field cage + cathode transient response, hardening against HV discharge damages  From 35ton: avoid bonding wires across board boundaries, modify CE attachment, redesign bubble containment, allow proper clearances between interconnected parts full 3D model is essential to ensure successful integration/installation

QA Program, cont. Material tests  Wire bonding method studies (SBND)  Molded wrapping board edge bonding test (SBND)  CTE measurement of all structural materials  APA frame construction method (welded vs bolted)  CPA resistive materials (temperature, abrasion, discharge, electrical contact…)  Field cage profiles (HV test in pure LAr)  Destructive test of pultruded fiber glass beam to validate FEA  HV bus interconnect test (cold)  Outgassing test of all materials at FNAL MTS  Radioactivity measurements on CPA material Long term reliability study of components (?)

QA Program, cont. Mockups/prototypes & qualification tests  Full size APA frame, and process prototype assembly (thermal cycle, vibration)  TPC suspension feedthroughs and rail/carriages  Cryostat ceiling to investigate TPC suspension/installation/deformation  Full size field cage (thermal cycle, vibration?, HV)  Full size CPA module (thermal cycle, vibration?, HV)  CE/PD cable routing through APA frame  CE module mounting, and cable routing/strain relieve  Beam window integration (mechanical, electrical, thermal)  Shipping container

QA Program, cont. Define and document all QC procedures, acceptance criteria and corrective actions (at production site or at CERN) in case of defects Material review board  Review QC results and implement corrective actions Schedule reviews at key design phases  APA, CPA/FC, Integration Drawing revision control Travelers for all production modules Training of collaboration personnel responsible for handling the TPC components during design, production, testing and installation phases

QC Tasks: APAs (6 modules) Task NameWhereLaborEquipment APA frame material tolerance testPSL UK 2 persons 1 week Large flat table APA frame acceptance testPSL UK 3 persons 3 weeks Large flat table, crane, laser tracker Wire tension, pitch measurement (30 sec per wire) PSL UK 2 persons 1 month Tension meter Wire continuity testPSL UK 2 persons 1 month DVM, cable adapter CCR board leakage current test and HV test warm and cold PSL UK 1 person 1 month HV power supply, current meter APA acceptance test with cold electronics in warm and cold (1 day cool down, 1 day test, 1 day warm up) PSL UK 3 persons 1 month Large faraday cage, large cryostat, CE modules + miniDAQ PD integration test: PD insertion, cable connection test PSL UK 1 person 6 days Cable tester, mockup PD module

QC Tasks: CERN Task NameWhereLaborEquipment APA unpacking, acceptance test with cold electronics in CERN to check wire integrity CERN3 persons 2 weeks Large faraday cage, CE modules+miniDAQ APA wire tension spot check: Priority to board boundary wires CERN2 persons x weeks Tension meter The tasks below are deemed to be Installation activities APA integration with full CE moduleCERN APA integration with PDsCERN APA integration with DAQCERN Cold test of fully integrated APAsCERN3 persons 3 weeks Large shielded cryostat, DAQ

QC Tasks: TPC CPAs (~15 modules) Task NameWhereLaborEquipment CPA resistive material acceptance test: measure uniformity of surface resistivity and lamination quality CPA site2 persons 1 week Custom R probe CPA module acceptance test: dimensional tolerance, electrical contact check, surface finish check on tube section CPA site2 persons 3 weeks High -R meter, large flat table CPA module cold test with HV busCPA site2 persons 2 weeks Cryostat, hi-R meter CPA assembly test 2.3m x 6m assembly CPA site3 persons 1 week High ceiling, crane CPA HV test: Testing the CPA edges in air or LAr CPA site2 persons 2 weeks HV power supply, safety cage

QC Tasks: TPC CERN Task NameWhereLaborEquipment CPA unpacking and acceptance tests: Visual inspection of surfaces, electrical contact check, resistivity check CPA site2 persons 1 week High-R meter

QC Tasks: TPC Field Cage (24 modules, ≥ 6 with ground planes) Task NameWhereLaborEquipment Visual inspection of the metal profiles to identify deep scratches and sharp edges FC site1 person 1 week Cold test the resistors and varistors: Bin the resistors based on their cold resistance, verify the threshold voltage and resistance at operating bias FC site1 person 1 month HV supply, Hi-R meter HV breakdown test of UHMW caps in airFC site1 person 1 week HV supply Continuity test of the field cage/R-dividerFC site2 persons 1 week HV supply Hi-R meter Visual inspection of the ground plane panels to identify sharp edges in perforations. GP site2 persons 1 week HV breakdown test of ground plane in air: HV across a thin air gap, looking for corona GP site2 persons 1 week HV supply HV breakdown test of FC/GP assembly in assembly site (FC/GP could ship separately) FC site?2 persons 1 week HV supply

QC Tasks: TPC Field CERN Task NameWhereLaborEquipment Visual inspection of the assembly for shipping damages, Continuity test of the field cage/R- divider CERN2 persons 1 week HV supply Hi-R meter HV breakdown test of FC/GP assembly in air: If assembled at CERN CERN2 persons 1 week HV supply Beam window integration testCERN2 persons 1 week HV supply cryostat?

QC Tasks: TPC Integration Task NameWhereLaborEquipment TPC installation rail partial assembly with suspension feedthroughs PSL?3 persons 1 month High ceiling, crane 1/3 scale TPC integration trial: 2 APAs, 2 CPAs, 4 horizontal FCAs, 3 vertical FCAs. PSL?5 person 2 months High ceiling, crane, TPC assembly tools

QC Tasks: TPC HV System (1 feedthrough, 1 or 2 filters) Task NameWhereLaborEquipment Test the HV feedthrough in clean argon up to 250kV? HV site2 persons 1 month HV supply, large LAr dewar with purification Measure the HV filter efficiency at the frequency range of interest HV site1 person 2 days High ceiling, crane