1. 1 WA105 General Meeting CERN, 21/9/2015 Technical Board, introduction Dario Autiero, IPNL Lyon

2. 2 Constant TB activity since end of January discussing the main aspects of the 6x6x6: EHN1 Integration Beam design and instrumentation Cryostat design Cryogenics Light readout DAQ integration Online processing facility LEM production and commissioning CRP structure design Cathode and field cage design HV system Feedthroughs Cosmic rays measurements Last months efforts focused on Cryostat and detector interface interfaces (feedthroughs + CRP design) integration in EHN1  Rather urgent issues to be finalized for the cryostat In parallel constant progress with the 3x1 construction followed in the 3x1 meetings https://laguna.ethz.ch/indico/categoryDisplay.py?categId=9

3. 3 3x1 weekly meetings: https://laguna.ethz.ch/indico/categoryDisplay.py?categId=4

4. 4 Increase of activities since June on the EHN1 integration with dedicated integration meetings (5 so far), alternated to the neutrino platform meetings: Discussed: General advancement of EHN1 construction Cryostat requirements Cryostat integration and position wrt beam, muon background, clean room buffer, single phase test Mounting procedures for the cryostat Counting rooms, access to the top of the cryostat Power and network requirements Ilias had the goal of defining the requirements and a first layout of EHN1 integration by the middle of September Also the design of the beam line has to be finalized by the end of this month  Two dedicated presentations at this WA105 general meeting https://indico.cern.ch/category/4706/ Additional infos: Progress reports to SPSC in April and June 2015

5. 5 Rather tight schedule defined in the WA105 MOU: The next 3 months will be crucial to finalize many details of the design: Orders for the external cryostat structure are foreseen by Marzio to be submitted by the end of the year. Marzio is actually focusing on having a similar design for the single-phase and double- phase cryostats. Calculations on the external structure are being validated by an external company A detailed discussion on the cryostat design by CERN with GTT did not happen yet a document with the requirements and conceptual scheme for GTT should be completed by this week  We have to focus in the next weeks in checking that the final design is OK with respect to the requirements we have submitted in these months, positions of the penetrations etc..

6. 6 Some general requirements on the WA105 cryostat:  Inner Cryostat dimensions: 8x8x8 m3  Average heath flow: <=5W/m2  Operating gas pressure: ranging from -50 to +100 mbar with respect to atmospheric pressure  Detector weight: 15.38/12.82 T (dry/wet weight) Of which: Anode deck: 2.68 T, Field cage 12.70/10.14 T (dry/wet weight)  Penetrations: Anode Suspension FTs: N. 12, crossing tube diameter 40 mm Field cage suspension FTs: N. 16, crossing tube diameter 80 mm Signal chimney FTs: N. 12, crossing tube diameter 277 mm Slow control chimneys: N. 4, crossing tube diameter 80 mm HV FT: N. 1, crossing tube diameter 156 mm Manhole: N. 1, crossing tube diameter 609 mm  TCO access connected to clean room buffer, beam window pointing to center of detector active volume  Cryogenic penetrations defined by the cryogenic group

7. 7 3x1 cryostat construction with insulation panels and corrugated membrane completed in first half of August 2015 Local leak tests performed with He leak checker in sniffer mode (sensitivity 1 E -6 mbar l/s), no leaks found. Work in progress to define a more sensitive accumulation test which should globally achieve a sensitivity of 1 E -6 mbar l/s or better over the entire surface of the membrane Top-cap ordered to GABADI after some adaptations to requirements from cryogenic group 3x1 design ensures the requirement of 5 W/m2 with 1 m insulation thickness with a combination of 3 panels (300+300+400 mm). 400 mm panels are the standard ones in LNG construction. TBC configuration for 6x6x6

8. EHN1 Extension WA105 Single phase test 8

9. 9 Cryogenics: finalization of cryogenic system for 3x1  6x6 design not started yet, needed in the pipeline immediately after completion of 3x1 on the basis of 3x1 as building block  presentations by D. Montanari and S. Wu

10. 10 Field cage and cathode design: Finalization of feedthroughs + field cage + cathode design (see presentation by Franco) 3 field rings interrupted for the particle beam “chamber” Cathode made by a pair of outer ring (as field rings) and transparent- conductive glass/acrylic/polycarbonate panels with embedded wire mesh and WLS.  New techniques for the realization of the cathode (transparent ITO conductive coating on large PMMA plates)  Presentation by C. Regenfus Hanging chain

11. 11 WA105 6x6x6 installation sequence and logistics: Installation logistics for the 6x6x6 not discussed at this meeting Important to finalize the detector installation procedure: CRB use, mounting procedures once the final dimensions of all elements (CRP frames, field cage elements, cathode elements, etc..) are know. Foreseen to have a full week of work with Roger Collins to define the installation procedure once all the elements are precisely known,  to be organized before the end of the year

12. 12

13. 13 DUNE optimization: Far detector anode plane composed of 80 (4x20) independent Charge Readout Plane units (CRPs) 3x3 m 2 1920 readout channels/CRP unit Suspension chimney Signal chimney 640 ch Slow control chimney 3m uTCA crate Each CRP:  36 LEM/anode sandwiches (LAS) 50x50 cm 2  3 signal chimney feedthroughs 640 channels  3 suspension feedthroughs for level adjustment  1 slow control feedthrough  X,Y collection strips of 3 m, 3.125 mm pitch (like in WA105 6x6x6 m 3 ) Strips connections scheme Y1-160Y161-320Y321-480Y481-640Y641-800Y801-960 X1-160 X161-320 X321-480 X481-640 X641-800 X801-960 50x50 cm 2 LAS uTCA crate

14. 14 Zoom on a corner of the DUNE detector including 2 CRP unit

15. 15 Detector quantities  80 CRP units  60 Field shaping rings  240 Signal FT chimneys  240 Suspension chimneys  180 PMTs

16. 16 Possible implementation of the WA105 anode with 4 DUNE 3x3 m 2 CRP units

17. 17 DUNE CDR Far Detector Alternate design, synergies and WA105 sections Design for a double-phase 10 kton module defined in the DUNE CDR for CD1-refresh (April-July 2015) Continuation of 10 kton design activities in the framework of the DUNE Far Detector working group (Double-phase subgroup, Conveners M.Zito, S. Murphy) Activity to be pursued in strict contact with WA105 developments Next urgent step in view of CD3a review of the facility: definition of detector interface and logistics requirements  review of construction/installation design and detailed logistics of the construction steps studied for Phyhasalmi for the SURF double-phase 10 kton detector installation Far Detector Alternative Design WA105 Synergies

18. 18 Anode deck design:  dedicated TB meeting last Monday  hot item to be discussed at this meeting (see presentation by LAPP group), finalize design of 3x3 DUNE-like CRP modules (structure, assembly procedure extraction grid integration) Horizontal cold bath test of the 3x1 CRP successful. Photogrammetry 3D characterization on 260 points ~100 um accuracy

19. 19 DAQ timing-trigger integration CC 1CC 2 CC 12PMC CC 6 CC 7 6 10 GbE links + 2 spares Bittware card 1Bittware card 2 7 10 GbE links + 1 spares Meinberg GPS White Rabbit GrandMaster switch WR slave MCH mezzanine WR slave trigger board Time Beam window NIM signal every 20 s Beam Trigger counter NIM signal ~ a few 100 Hz Charge readout Light readout WR Clock + time + triggers Digitized data Time Data processing PC 1Data processing PC 2 Trigger PC Cosmics counters

20. Trigger counter uTCA crate of LRO PMTs For light readout Crate with NIM logic Spill signal (cable) PC with WR time stamping card WR Time stamps: Beam trigger Start of spill External cosmic trigger Calibration pulses External trigger plane for cosmics WR switch Light readout (LRO) WR link x12 Charge readout WR links Light

21. 21 White Rabbit based Time/trigger distribution scheme WR Grand Master SWITCH Meinberg GPS MASTER CLOCK µTCA Shelf WR slave µTCA Shelf WR slave µTCA Shelf WR slave µTCA Shelf WR slave Clock + time + trigger data on uTCA backplane Clock + Time AMC GbE AMC PC WR slave Trigger board No need to develop analog clock distribution system and microTCA receiver cards Beam counters/large area cosmic counters trigger board also in WR standard  generates trigger timestamps transmitted on WR network Light readout DAQ uTCA  generates trigger timestamps transmitted on WR network Development of the WR slave as MCH mezzanine from a commercial WR node Sub-ns sync accuracy Time and Trigger distribution Light readout uTCA crate (generates light triggers)

22. When we have a beam trigger we can have on average 70 cosmics overlapped on the drift window after the trigger (these cosmics may have interacted with the detector in the 4 ms before the trigger and in the 4 ms after the trigger  chopped tracks, sliding effect

23. t=beam trigger - 2 ms t=beam trigger  reconstructed event drift t=beam trigger t=beam trigger + 2 ms reconstructed event drift Cosmic overlaps in +- 4 ms around the beam trigger time  Arrival time tagging by LRO signals Cosmic ray Shower Overlap before beam trigger Overlap after beam trigger

24.  Definition of LRO digitization requirements in collaboration with SB, reported in LRO digitization talk of this afternoon by P. Prat During spills we need a continuous digitization in the +-4 ms around the trigger time of the light (the light signal is instantaneous and has the real arrival time of the cosmics) Sampling can be coarse up to 400 ns to correlate to charge readout  Example: sum 16 samples at 40MHz to get an effective 2.5 MHz sampling like for the charge readout The LRO card has to know spill/out of spill Out of spill it can define a light triggers when n PMTs are over a certain threshold and transmit it over the WR

25. 25 Online storage and data processing  first design defined (see JM’s talk) now see how to move to implementation with CERN Defined basic architecture for local network, storage and computing:  Possibility to run with the beams without zero suppression at 100 Hz, event size 150 MB 15 GB/s, Huffman lossless compression under study  Online buffer storage up to ~PB  Online processing farm for event reconstruction, purity and gain analysis from cosmic ray tracks overlapped to beam events in a +-4ms window around the beam triggers

26. 26 A lot of progress ! (on top of infrastructure preparation and design issues discussed before) a lot of progress on 3x1 construction and preparation of the detector elements for 3x1 and 6x6: LEM tests Feedthroughs prototyping Purification and cryogenics PMTs for light readout HV Slow control Electronics for charge and light readout and DAQ Discussed in the talks of the TB sessions today …

27. 27 Quite crowded agenda: Morning: (A) focused on infrastructure and integration issues Afternoon: (B) Common 6x6 and 3x1 session, progress on detector instrumentation (C) 3x1 Specific session Cosmic ray measurements and large area trigger counters talk added at the last moment to first morning session A B C