ICARUS TPC Frontend electronics Sandro Centro Alberto Guglielmi

ICARUS TPC Front-end electronics Sandro Centro, Alberto Guglielmi INFN Padova SBN Directors Review

Outline l l l ICARUS TPC Read-out System Overview The 64 -channel electronics board (A 2795) New feed-through flanges New DBB boards Performance of the new ICARUS electronic read-out System overview (TPC front-end and read-out electronics) Technical Status: Preamplifier and A 2795 boards Technical Status: feedthrough flanges Technical Status: Mini-crates, PS, and DBB Installation milestones Other tasks Time schedule Slide: 2

ICARUS TPC Read-out System Overview l The new ‘’warm’’ ICARUS TPC electronics prepared in view of the ICARUS SBN operation includes: Ø A new front-end based on analogue low noise/charge sensitive pre-amplifier; Ø A serial 12 bit ADC system, one per channel with 400 ns sync. sampling; Ø A serial bus architecture with optical links for Gigabit/s transmission. l In the new compact design both analogue/digital electronics (single high performance FPGA) are directly mounted on ad-hoc signal feedthrough flanges acting as electronics backplane. Ø 9 boards per mini-crate serving 576 ch. , 64 ch. each. Ø Each board hosts 64 pre-amplifiers, 64 ADC, 0 -3. 3 V rail to rail, FPGA, memory, optical link interface. Ø Backplane of mini-crates distributes power supply and local control signals. Gas ADC Fibers RAM Test IN Front-end amplifiers (64/board) FPGA opt ical link ADC UHV Feed-through (18 x 32 ch. ) … Decoupling board (32 ch) Twisted pair cables (~1. 8 -6. 2 m, 57 p. F/m) … Sense wires (4 -9 m, 20 p. F/m) TT-link Trigger Liquid argon REG H. V. (<± 500 V) 12 bit serial ADC 400 ns sampling Slide: 3

The 64 -channel electronics board (A 2795) Eight preamplifier modules (64 channels) Signal connector from wires 64 serial ADC Digital part: FPGA, memory, optical link interface Shielding Backplane connector for PS and local control signals Voltage regulators Slide: 4

New feed-through flanges External side Internal side l Custom made UHV thigh technology (no through-going holes, electrical connections through staggered PCB layers): Ø 18 connectors (32 channels each) for a total of 576 channels. Ø External side: connectors for CAEN boards direct insertion. Ø Internal side: SMD connectors to receive decoupling boards or cables. Ø 8 additional SMA connectors for test pulse distribution and wires biasing (~± 400 V). Slide: 5

New DBB boards l New DBB boards to decouple signal transmission from HV distribution, will be installed inside the detector but of LAr, directly underneath the readout flange. They are organized in clusters of 9 PCBs, each one holding 64 channels, 576 channels per flange. l DBB prototypes finalized and successfully tested at the 50 liters LAr TPC at CERN; l DBB cage and cables clamps: Ø Mechanics design has been finalized and prototypes successfully tested; Ø Metal parts are grounded to flange while the floating components are realized in G 10 Slide: 6

Performance of the new ICARUS electronic read-out l Full electronic chain tested in 50 liters ICARUS TPC at CERN collecting cosmic rays: Induction and Collection wire planes (128 wires each), 2. 5 mm wire pitch, 4 mm plane spacing, E=500 V/cm l Single m. i. p. track event: Ø Same ~2 ADC # (~1500 e-) RMS noise for both Collection/ Induction; Ø Unipolar Collection signal: ~30 ADC #; Ø Symmetric bipolar Induction signal, slightly reduced amplitude as expected Ø After signal integration by a running sum and a baseline restoring, a S/N ~ 10 is is recognized in Induction view Ar. Xiv: 1805. 03931, sumitted to JINST Slide# : 7

Technical Status: Preamplifier and A 2795 boards l Pre-amplifier status: ü 56, 000 (53248 wires in T 600) channels produced and tested in the INFN Electronic Lab. in Padova; ü 48, 000 ch. already delivered to CERN; ü 2, 600 ch. spares in production. l A 2795 boards delivery: ü 432 boards delivered, pre-amplifiers mounted and fully tested with test-pulses: < 2. 5 rms counts noise has been measured (cables capacitance included); ü A full T 300 can be equipped; ü For 2 nd T 300, a part of the boards delivered by CAEN by September 2018; they will equipped with pre. Amps and tested. On-going discussions both with INFN management and supplier to anticipate full delivery of A 2795 boards by end 2018 instead of February Slide# : 8

Technical Status: feedthrough flanges l Flanges status: ü 96 in total required for full T 600; ü 41 flanges ready final electrical test; ü 20 in Criotec for stainless steel parts gluing and vacuum tests: expected back to Padova for final electrical test by June; ü 39 PCB ready for connector mounting in Padova, by June delivered to Criotec for stainless steel parts gluing and vacuum tests; ü 3 flange prototypes usable: likely they will be part of the spares; Total delivery to CERN by August 2018. Slide# : 9

Technical Status: Mini-crates, PS, and DBB l Mini crates and backplane status: ü 105 mini-crates already delivered to CERN; ü All PCB backplanes will be delivered to CERN by June 2018; Backplane will be assembled/tested and installed in the mini-crates in Padova, by October 2018. l Power supplies status: üPS prototypes tested/approved by Fermilab; ü 24 PS will be ready by July 2018; Full production will be delivered to FNAL by December 2018. l DBB’s and cage status: ü 864 DBB required for full T 600; 915 in production; ü Expected delivery at CERN by June. ü Cage tendering is in progress; Full production expected by Sept. 2018. Slide# : 10

Human resources needs and risks l The construction of the ICARUS TPC electronics is on-going in INFN Padova laboratory with the support of the staff of the Electronic and Mechanical Services of the Department which includes more than 15 people including engineers and technicians actively working in cooperation with BNL, CSU, FNAL, SLAC, UTA. l Tests on the new electronics are being performed both at the lab level and with the 50 liters LAr-TPC at CERN in cooperation with CAEN supplier. l In order to minimize the risk of failure, all electronic channels will be tested channel by channel before to be sent to FNAL for the installation on ICARUS. l Moreover a complete testing station including a flange, DBB’s and a fully equipped Mini-Crate with 9 2795 boards is in preparation at FNAL in order to test and eventually repair malfunctioning pieces. l The installation and test of TPC electronics will be performed by physics /engineers and technicians of INFN Padova (~10 man months) in cooperation with BNL, CSU, FNAL, SLAC, UTA. l We are in the process to ask to INFN 2 nd Commission the required financial support. A financial support from Fermilab to cover the permanence at Fermilab for a Electronic Engineer will be very welcome Slide# : 11

TPC: detailed plan – timeline CY 2019 CY 2018 Q 3 Q 4 Q 2 Q 1 CY 2020 Q 1 Q 4 Q 3 Flanges Production & test DBB & cages production & test Flanges, DBB installation & test Major Milestone 1 A 2795 TPC boards + amps for 1 st T 300 A 2795 TPC boards + amps for 50% 2 nd T 300 A 2795 TPC boards + amps for 2 nd T 300 Major Milestone 2 Mini-crates and backplanes PS Installation & dry test of 1 st T 300 TPC electronics Major Milestone 3 Installation & dry test of 2 nd T 300 TPC electronics 12 Major Milestone 4

TPC electronics: Summary & Outlook l The activity of the construction and test for the ICARUS front-end electronics is proceeding well in Padova toward its completion along the well established planning already discussed. Essential support is coming from BNL, CSU, FNAL, SLAC, UTA ICARUS groups. l The already measured performance with the 50 liters LAr-TPC fits very well the expectation and needs for the ICARUS exploitation in the SBN project. l INFN has provided all the required financing to prepare the electronic read-out of ICARUS. l Installation and test of TPC electronics will be performed by physics /engineers and technicians of INFN Padova with BNL, CSU, FNAL, SLAC, UTA support. l Hopefully the TPC electronics will be installed, ready for data taking by next Spring 13