RENO Collaboration Meeting 2008 10 RENO Electronics QBEE

RENO Collaboration Meeting, 2008. 10 RENO Electronics - QBEE 장 지 승 (전남대학교)

Contents 1. QBEE의 소개와 성능 2. DAQ 구성 - Master Clock 소개 - Online computer setup 3. 진행상황과 계획

QBEE - QTC Based Electronics with Ethernet • • 1. 2. 3. 4. Super-Kamiokande를 위해 동경대의 ICRR에서 개발 개발목표 ! ! Stable DAQ system for next 10~20 years e e r f ATM (Analog Timing Module from KEK) was used for long time e m Better data quality d ti Deaand Temperature !dependence 1) Reflection signal ! A dead time for mu-decay detection (~us interval events) y t i v resolution i t 2) Charge dynamic range and Energy i s n e lower energy(~3 Me. V)ssolar neutrinos to multi-Ge. V or higher energy neutrinosigh H Recording every hit of PMT Anti-neutrino events for supernova relic neutrino search by detecting 200 us delayed signal High speed signal processing Nearby galactic supernova burst events ! ! d e e p s h g i H

…. 12 PMTs DC RJ 45 Power supply 8 QTC(Charge to Time converter) Ethernet card RJ 45 …. 12 PMTs Overview of QBEE 100 Mbps Computer 100 Mbps Master Clock • 60 MHz clock • TDC reset • TRG ID • Event# FPGA 4 TDC(Time to Digital Converter)

• QTC Charge Hit timing • TDC (ATLAS Muon TDC) - Digitizes the each edge time • FPGA (DSM, SIC etc) - Calculates the digitized hit timing and integrated charge

• Built-in Calibration pulser & Temperature sensor

Specification of QBEE based on IWATSU manual 1. The number of the ch. : 24 ch 2. Charge dynamic range : 0. 2 -2500 p. C (1250 p. e. ), 3 gain range (Small ~51 p. C, Medium 51~357 p. C, Large 357~2500 p. C 3. Charge Linearity : +/- 1%

4. Charge resolution: ~0. 1 p. C(. 05 p. e. ), Timing resolution: ~0 5. Temperature dependence (per degree) Gain variation : 0. 4% Pedestal variation : less than 0. 15 p. C Charge accuracy after pedestal subtraction : less than 0. 15 Timing variation : less than 0. 02 nsec

6. Processing speed : 900 ns/hit 7. Discriminator : 0 ~ -1. 7 m. V, 0~3. 4 m. V, 0. -11. 9 m. V 8. Noise level : Noise hit rate < 10 Hz @ -0. 3 m. V DSC -0. 3 m. V PMTsigna l 9. Cross talk hit : less than 1/1000 between ch. @0. 6 m. V DSC

10. Reflection coefficient : less than 1/1000 (-60 d. B) @ 20 inch PMT and 70 m coaxial 11. FIFO memory size : 1. 5 MB 12. Power consumption (Maximum) +5. 2 V/1. 6 A, -5. 4 V/0. 7 A, +8/0. 81 A, -8 V/0. 3 A, +15 V less than 24 W

DAQ 구성 • RENO requirement – 18 QBEEs per 1 detector Computer QBEE output 100 Mbps Distributer 100 Mbps 60 MHz clock TRG ID, event# Master Clock Module Sync. Out Flat cable @ Super. K 60 KHz Serial signal ( TRG ID & Event # etc. ) TRG module

MCLK output specification o Output via 100 Mbps Ethernet cable n (1, 2) pair : 60 MHz clock n (5, 6) pair : TDC reset + Trigger ID + 32 bit event # n (3, 4) and (7, 8) pairs : not used o Spec. of serial signal [ 1 bit = 1 clock, total 38 clocks = 633 nsec ] Start at a negative edge of the clock 60 MHz clock Serial signal Header (always 1) Trigger (Narrow/Wide + Pedestal + Split) Trigger on/off + TDC reset on/off • Trigger w/o TDC reset (10) • Trigger w/ TDC reset (11) • TDC reset only (No Trigger) (01) 32 bit event #

• Example of Master Clock Output 110 100 0000000100110110000011001 60 MHz clock 633 nsec 60 KHz Serialized signal Serial signal Header (always 1) Trigger (Narrow/Wide + Pedestal + Split) Trigger on/off + TDC reset on/off 32 bit event #

Online computer setup with QBEE based on Super. K online system • Each computer has 4 core • is Ethernet cable 100 Mbps/QBEE x 18 QBEE 24 PMTs 1 Gbps x 3 LAN SWITCH Front End Computer collector sorter sender Computer …… …… SISCO SYSTEM Catalyst 2960 G Series Fujitsu PGR 10317 L-D 18 output Distributor Master Clock Module Flat cable Sync. Out Bit 3 1 Gbps(? ) VME- collector sender Computer TRG Module LAN SWITCH Merger Software trig. Organizer Storage Computer. . . Data flow manager Computer

• Schematic view of data flow in front end computer based on Super. K online syste Front end computer Fast QBEE Ethernet Collector 24 PMTs QBEE Collector 18 QBEEs 1. 5 MB/sec/QBEE Sorter Sender Merger 27 MB/sec Software for this process was provided by Iwatsu and Super. K online group.

Online computer setup with QBEE • Each computer has 4 core • is Ethernet cable 100 Mbps/QBEE x 18 QBEE 24 PMTs 1 Gbps x 3 LAN SWITCH Front End Computer collector sorter sender Computer …… …… SISCO SYSTEM Catalyst 2960 G Series Fujitsu PGR 10317 L-D 18 output Distributor Master Clock Module Flat cable Sync. Out Bit 3 1 Gbps(? ) VME- collector sender Computer TRG Module LAN SWITCH Merger Software trig. Organizer Storage Computer. . . Data flow manager Computer

• The Merger system Data from the front-end PC Combine the data from each FEPC by using the HW trigger number. Merger • The software trigger system #of events HW trig. no. 1 Event no. 1 2 3 2 4 5 3 6 4 7 8 5 9 6

Electronics setup for 1 detector LAN switch Power Supply. MCLK & for TKO Distributor 6 PC 18 QBEEs in TKO FAN 10 H V sp lit te r FAN NIM PMT HV supply VME w/ TRG