The JUNO Top Tracker Marcos Dracos IPHC-Strasbourg M. Dracos The JUNO Top Tracker Marcos Dracos IPHC-Strasbourg Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Top Tracker Top Tracker Veto for the covered surface (impossible to cover all surface around the central detector). Study the production of 9Li/8He produced by muons crossing the detector and mimicking IBDs (~80 against ~60 IBD/day). Study the production of fast neutrons produced by muons crossing the surrounding rock. Precise measurement of the energy spectrum of cosmogenic isotopes. Define the cuts to be applied in the CD to reduce these backgrounds. Introduce all measured parameters in the simulation. Better estimation of systematic uncertainties induced by this noise. Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Top Tracker How to cover a significant fraction of the top surface (40x40 m2) and tag a large number of cosmogenic background? take the decommissioned OPERA Target Tracker ~2900 m2 sensitive plastic scintillator area Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA JUNO Top Tracker 62 walls (496 modules) 6.8x6.8 m2 sensitive area x y Hamamatsu MA-PMT (3x3 cm2) (64 channels, 63488 ch. in total) Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

OPERA TT dismounting (finished) M. Dracos OPERA TT dismounting (finished) 6.8 m During the extraction of one TT wall (over 62) from OPERA detector. The TT is now stored in 7 containers in the underground lab of Gran Sasso waiting to be shipped to China. Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

TT storage area in China (2017-2020) M. Dracos TT storage area in China (2017-2020) TT storage (and PMT testing) JUNO temperature control probably needed (for the next 3 years) Pan-Asia Warehouse Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos TT aging monitoring Conditions during storage will be very different wrt Gran Sasso (temperature, humidity, radiation etc.) and hence the ageing of the plastic scintillator could be faster if the proper treatment is not done promptly. Few TT modules remained with their "old" electronics and DAQ to monitor their behavior inside the containers. TT modules with electronics inside the containers reconstructed muon track number of p.e. Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Top Tracker Structure M. Dracos 3 TT layers spaced by ~1 m (3 m height in total), a solid bridge is needed to support the TT and its mechanical structure (~200 tons in total), accessibility to electronics easy to mount without too much interference with other activities (e.g. LS filling) Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

Top Tracker drawings bridge (40x21 m2, ~200 tons) IHEP M. Dracos bridge (40x21 m2, ~200 tons) IHEP overlap of sensitive areas by ~15 cm TT mechanical support by JINR, drawings by IPHC 3 TT layers ~3 m electronics accessible from the bottom or top access to bottom electronics Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

~6 months in total for mounting the TT Top Tracker mounting used for positioning of TT end caps supporting frame used during mounting and remaining after for final mounting auxiliary frame used during mounting and transportation (same for all walls) walk paths to access the TT electronics Dubna ~6 months in total for mounting the TT possible area to mount the TT walls Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

TT DAQ Rate (radioactivity) The sample with label 2702 is extracted from underground between -633 m and -638 m, few meters above the bottom of the water pool.  Measurement realised by CENBG -Bordeaux using a Ge detector. GS (just for comparison): 40K 26 ± 2 Bq/kg 238U 1.8 ± 1 Bq/kg 232Th 1.5 ± 1 Bq/kg much higher radioactivity than in GS! Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

TT Rate and electronics (radioactivity) simulations done by LLR and IPHC 800 Hz/ch. ~25 Hz/ch. in Gran Sasso Hz coincidences are needed Hz 3 well aligned points (fit) very low rate obtained using well aligned points no problem to be done off-line for on-line, fast coincidences have to be performed just putting each point at the middle of each wall reduces the rate to about 1.2 kHz, affordable by the DAQ Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

TT Electroniques OPERA new electronics concentrators, M5 PM5 PM1 M1 RO1 PM2 M2 RO2 PM3 M3 RO3 PM4 M4 RO4 PM12 M12 RO12 PM11 M11 RO11 PM10 M10 RO10 PM9 M9 RO9 CONCENTRATOR BOARD (GDCC) RO5 M6 PM6 RO6 M7 PM7 RO7 M8 PM8 RO8 M16 PM16 RO16 M15 PM15 RO15 M14 PM14 RO14 M13 PM13 RO13 OPERA new electronics local x-y trigger (LV1) global trigger (LV2) concentrators, one per TT wall (16 PMTs) (62) front end cards with MAROC3 chip (996) DAQ cards (996) feedback to the sensors in less than 1 μs Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA MAROC3 Chip (Omega) Out_Q : Multiplex charge output Triggers OR of triggers Out_ADC : Internal ADC output fast trigger charge measurement (internal and external) Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

Front End Board (IPHC) FPGA MAROC3 in its initial encapsulation, test card provided by OMEGA FPGA MAROC3 in its initial encapsulation, too large to fit on the front end board ATLAS like FEC new BGA encapsulation new FEB (inspired by ATLAS) Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Front End Board New version (almost final) successful running the chip two times faster than recommended (80 MHz) to decrease the dead time Maroc 3A (BGA) test  OK Version 2 of the front end  Tested Final testing of the front end card with PMT Test with the JUNO ROB is coming Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

Readout Board (LNF-CAEN) Board design: completed. PCB design: completed. PCB production: completed. Board assembling: March 2017. RO Board validation: May 2017. FE-RO Boards system validation: July 2017 8 layers light injector pulser (already tested) HV module Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Readout Board CAEN-LNF FEB-ROB connector (already tested) First two ROB prototypes Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

Concentrators (based on an existing card at LLR) Giga Data Concentrator Board (GDCC) This system is used for: CALICE ECAL project (ILC development) : Readout OMEGA SKIROC chip WAGASCI Project (T2K upgrade) : Readout OMEGA SPIROC chip Other systems at LLR to read OMEGA EASIROC and MAROC chip (under evaluation) Format : VME 6U (chassis with only J1 connector used for power distribution) Format shared in 2 parts (1/3 – 2/3) 1/3 is the mezzanine with the HDMI connections 2/3 is the GDCC “heart” with the main functionalities (Based around a Xilinx Spartan XC6SLX75 + Marvell component) USB is used to an extra access to the GDCC (debug for example) VME USB RJ45 & sfp fiber Main part Mezzanine part 7 x DIFs HDMI CCC HDMI also performing x-y correlations Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA TT prototype Test of electronics in almost real conditions IPHC 4 x-y layers electronics tests triggering online software muon telescope Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA

M. Dracos IPHC-IN2P3/CNRS/UNISTRA Conclusion M. Dracos OPERA TT already dismounted and stored in 7 containers in GS. Custom formalities to be settle before shipping. Storage in a warehouse in China (together with 20" PMT testing). TT scintillator aging monitoring during storage. TT design of the supporting structure almost final (3 layers, allowing accessibility to all electronics, IHEP, JINR, IPHC). Almost final FEB design, 2 prototypes produced by IPHC. ROB under construction by CAEN and LNF, a prototype very soon. Prototype concentrator based on existing card soon, by LLR. Installation in 2020. Tsinghua, March 2017 M. Dracos IPHC-IN2P3/CNRS/UNISTRA