Deep Underground Neutrino Experiment (DUNE) 1 Technical Proposal 2 - PDF document

Deep Underground Neutrino Experiment (DUNE) 1 Technical Proposal 2 23 Feb 2018: First draft of the TP volumes due 3 Volume 2: The Single-Phase Far Detector 4 February 26, 2018 5

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Contents 1 Contents i 2 List of Figures iii 3 List of Tables iv 4 1 TPC Electronics 1 5 1.1 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 1.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7 1.1.2 Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 8 1.1.3 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9 1.2 System Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 10 1.2.1 Grounding and Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 11 1.2.2 Distribution of Wire-Bias Voltages . . . . . . . . . . . . . . . . . . . . . . . . 7 12 1.2.3 Front-End Mother Board (FEMB) . . . . . . . . . . . . . . . . . . . . . . . . . 9 13 1.2.4 Additional FEMB/ASIC Designs . . . . . . . . . . . . . . . . . . . . . . . . . . 15 14 1.2.5 Cold Electronics Feedthroughs and Cold Cables . . . . . . . . . . . . . . . . . . 19 15 1.2.6 Warm Interface Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 16 1.2.7 External Power and Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 17 1.3 Production and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18 1.4 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 19 1.4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 20 1.4.2 APAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 21 1.4.3 DAQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 22 1.5 Quality Assurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 23 1.5.1 Initial Design Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 24 1.5.2 Integrated Test Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 25 1.6 Quality Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 26 1.7 Installation, Integration, and Commissioning . . . . . . . . . . . . . . . . . . . . . . . 33 27 1.7.1 Installation and Integration with APAs . . . . . . . . . . . . . . . . . . . . . . 33 28 1.7.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 29 1.8 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 30 1.9 Organization and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 31 1.9.1 Single-Phase TPC Electronics Consortium Organization . . . . . . . . . . . . . 36 32 1.9.2 Planning Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 33 1.9.3 WBS and Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 34 i

1.9.4 High-level Cost and Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 1 References 39 2 3 ii

List of Figures 1 1.1 Connections between the signal flange and APA at ProtoDUNE-SP. The interface be- 2 tween the electronics chain, the APAs, and the cryostat will be very similar at the DUNE 3 far detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 1.2 APA wire bias schematic diagram, including the CR board. . . . . . . . . . . . . . . . . 8 5 1.3 The CE architecture. The basic unit is the 128-channel FEMB. . . . . . . . . . . . . . 9 6 1.4 The complete FEMB assembly as used in the ProtoDUNE-SP detector. The cable shown 7 is the high-speed data, clock, and control cable. . . . . . . . . . . . . . . . . . . . . . 10 8 1.5 Measured pulse response with details on gain, peaking time and baseline adjustments. . 11 9 1.6 Baseline cold ADC ASIC block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 12 10 1.7 Block diagram of COLDATA ASIC design. . . . . . . . . . . . . . . . . . . . . . . . . 14 11 1.8 Prototype CE Box used in ProtoDUNE-SP. . . . . . . . . . . . . . . . . . . . . . . . . 15 12 1.9 Overall architecture of the CRYO ASIC. . . . . . . . . . . . . . . . . . . . . . . . . . . 16 13 1.10 Depiction of the substrate isolation technique that allows combining analog and digital 14 circuitry on the same CRYO ASIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 15 1.11 Block diagram of the DRE architecture for the ATLAS ADC ASIC. . . . . . . . . . . . 18 16 1.12 Block diagram depicting the two-stage SAR design of the ATLAS ADC ASIC. . . . . . . 18 17 1.13 TPC CE feedthrough. The WIBs are seen edge-on in the left panel,and in an oblique 18 side-view in the right panel, which also shows the warm crate for a DUNE module in a 19 cutaway view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 20 1.14 Exploded view of the signal flange for ProtoDUNE-SP. . . . . . . . . . . . . . . . . . . 21 21 1.15 Power and Timing Card (PTC) and timing distribution to the WIB and FEMBs. . . . . 22 22 1.16 LV power distribution to the WIB and FEMBs. 250W is for a fully-loaded crate with the 23 majority of the power dissipated by the 20 cold FEMBs in the LAr. . . . . . . . . . . . 22 24 1.17 Warm Interface Board (WIB). Note that front panel inputs include a LEMO connector 25 and alternate inputs for LV power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 26 1.18 FCi micro TCA power connector at the PTC end of the cable. . . . . . . . . . . . . . . 24 27 1.19 ENC (in electrons) and temperature (in degrees Kelvin) as a function of cold cycle time 28 in GN2 for ProtoDUNE-SP APA2. At the lowest temperature of 160K, the wrapped 29 wires measured 480e − noise and the straight wires 400e − . . . . . . . . . . . . . . . . . 30 30 1.20 Picture of the shielded room at Fermilab. . . . . . . . . . . . . . . . . . . . . . . . . . 32 31 1.21 Left: one side of the 40% APA with 4 FEMBs. Right: the full CE feedthrough and flange. 32 32 33 iii

List of Tables 1 1.1 TPC electronics components and quantities for the DUNE single-phase far detector. . . 3 2 1.2 Baseline cold ADC ASIC configurability. . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3 1.3 Performance requirements for the ATLAS-style ADC ASIC. . . . . . . . . . . . . . . . . 17 4 5 iv

Todo list 1 There are some placeholders for citations here; need to revisit how to cite e.g. interface 2 documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3 This section will be written for the second draft of the technical proposal. . . . . . . . . 33 4 This section will be written for the second draft of the technical proposal. . . . . . . . . 35 5 Please note that these dates may need to be revisited and that there may be more 6 time available prior to the beginning of construction. . . . . . . . . . . . . . . . . . 36 7 This section will be written for the second draft of the technical proposal. . . . . . . . . 37 8 This section will be written for the second draft of the technical proposal. . . . . . . . . 37 9 v