SoLID Collaboration Meeting Summary - June 8th, 2020
Outline of the SoLID collaboration meeting discussing DAQ requirements, trigger rates, infrastructure, and R&D items. Details on detector layouts and triggers for PVDIS and SIDIS, with information on SoLID requirements and associated risks. SoLID DAQ overview based on 12 GeV FADC electronics. Discussion on ECAL FADC trigger schemes and DAQ overviews for PVDIS and SIDIS setups.
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SoLID DAQ SoLID collaboration meeting June 8th 2020 Alexandre Camsonne
Outline DAQ overview DAQ requirements Trigger rates GEM rates Infrastructure R&D items Fall back onclusion
Detector layout and trigger for PVDIS Trigger Calorimeter + Cerenkov 200 to 500 KHz of electrons 30 individual sectors Max 17 KHz/sector 9/28/2024 SoLID DAQ 3
Detector layout and trigger for SIDIS Trigger Calorimeter + Cerenkov + MRPC 30 sectors Combined in 10 regions of interests Max rate 300 KHz 10 KHz/sector 9/28/2024 SoLID DAQ 4
SoLID requirements PVIDIS SIDIS
Risks associated with DAQ WBS Risk Level Mitigation 100 KHz capability Achieved resolution GEM readout High 1.2.4.2,1.1.5.3 Simulation, beam test Bandwidth sufficient, electronics can handle Data rates Medium 1.1.5.1.4 Test ( preRD and R&D) Can required trigger rate reached for SIDIS Trigger rate Medium 1.1.5.1.7,1.1.5.1.8 Can GEM deadtime be an issue for PVDIS 1.2.4.2,1.1.5.3 1.1.5.1.7,1.1.5.1.8 Drives chip choice and electronics design Deadtime PVDIS High Can data be reduced to a reasonable size for silo ? Simulation,test,beam test Data reduction Medium Can performance required be reached within budget Cost Medium Background rejection sufficient Particle ID High Simulation, beam test
SoLID DAQ overview DAQ based on 12 GeV FADC base pipelined electronics designed for 200 KHz trigger rates Added GEM readout similar to SBS but with trigger rates up to 100 KHz
ECAL FADC trigger HPS scheme Will be used for SBS, NPS before SoLID
DAQ overview PVDIS 30 sectors Mostly independent Trigger : coincidence Ecal and Cerenkov Transfer data from adjacent blocks for clustering Scaling of SBS HCAL trigger from 2 to 30 crates
DAQ overview SIDIS Similar to Hall D Reconfiguration of PVDIS crates to gather data of each trigger to a main VTP to produce the electron pion coincidence 100 KHz trigger rate capability
PVDIS electron trigger Coincidence ECAL and Gas Cerenkov Old Hall D Singles ECAL 290 KHz 230 KHz Singles rates Cerenkov 1.9 MHz 803 KHz Accidental 30 ns 16.5 KHz 4.1 KHz DIS electron 10 KHz max 7.7 KHz Total rate 27 KHz 12.1 KHz 7/9/2014 SoLID DAQ 11
Event size data rates PVDIS Data rate MBs 60.76 35.31 30.05 17.43 16.28 After noise cut 9.97 5.11 4.42 1.64 1.50 strips firing 115.25 70.21 60.73 37.51 35.25 event size bytes 1430.76 871.61 753.92 465.61 437.60 Event size MB/s 1 2 3 4 5 1156 1374 1374 2287 2350 21.17 10.35 8.81 3.07 2.79 244.73 142.21 121.05 70.21 65.57 3038.03 1765.39 1502.71 871.60 813.93 3038.03 1765.39 1502.71 871.60 813.93 1430.76 871.61 753.92 465.61 437.60 28.62 17.43 15.08 9.31 8.75 Total 159.83 Total 79.19 FADC 20000 Event size FADC Calorimete r Preshower 10 Nb channel Header Trailer Sample 14 4 4 12 280 9 4 4 12 180 400 Cerenkov 9 4 4 12 180 11600000 740 11600000 11.6 Total rate 94 MB/s About 2.9 GB/s for PVDIS at 20 KHz
SIDIS event size Occupancies with one sample readout by Weizhi , rates for 100 KHz Number of strips Strips per chambers GEM Occupancy XY strips MB/s 1 2.21 453 906 27180 245 2 8.78 510 1020 30600 1184 3 3.63 583 1166 34980 559.5 4 2.31 702 1404 42120 428.7 5 1.78 520 1040 31200 244.71 6 1.3 640 1280 38400 220 Total 20.01 3408 6816 204480 2901 GEM dominating 2.9 GB/s same requirement as PVDIS
GEM readout Baseline APV25 164 K channels required Assume reuse 100 K$ channels from SBS Simualation shown Evaluation of SAMPA chip Available Simulation show chip is adequate for occupancies even with slower shaping time Concern over radiation hardness Evaluation of VMM3 chip Available Radiation hardness should be sufficient No default multisamples Studying fast 6 bit ADC mode, preliminary results showed it should be adequate in terms of occupancy, need to evaluate 40 ns deadtime for PVDIS
SIDIS event size Occupancies with one sample readout by Weizhi , rates for 100 KHz Number of strips Strips per chambers GEM Occupancy XY strips MB/s 1 2.21 453 906 27180 245 2 8.78 510 1020 30600 1184 3 3.63 583 1166 34980 559.5 4 2.31 702 1404 42120 428.7 5 1.78 520 1040 31200 244.71 6 1.3 640 1280 38400 220 Total 20.01 3408 6816 204480 2901 GEM dominating 2.9 GB/s same requirement as PVDIS
FADC current development SuperBigBite HCAL Same trigger as PVDIS using 4x4 clusters instead of 6+1 Use VTP optical link NPS calorimeter readout Implementation of cluster readout for FADC
preRD request GEM APV25 readout Calorimeter trigger and readout Coincidence trigger Cerenkov SPD MRPC Deadtime measurements Cerenkov MAROC readout MRPC readout and test
Network upgrade for SBS ( before SoLID ) 1 GB/s Item Status Cost LHRS 1 intel CPU 4 intel CPU 15 K$ Computer disks 2 raid arrays 2GB/s 8 SSD ( 8x 2GB/s ) 20 K$ Network 1 Gigabit ethernet in Hall 40 GigE router 40 Gig adapter on adaq1 and adaq2 ( 1000 MB/s) 2 fibers 10 Gig Ethernet to Silo ( 2000 MB/s ) 30 K$ 5 K$ 8 drives LTO5 8 drives LTO6 4 LTO7 ( 300 MB/s) 4 LTO8 ( 360 MB/s) 4 LTO8 ( 360 MB/s) -> 6.2 GB/s Silo 40 K$ (IT) Upgrade fibers from 10 gigE to 40gigE or 100gigE : 8 GB/s with two fibers 18
SILO capabilities Mix of LTO 5 to LTO 8 : 24 drives total Current 5 GB/s 8 drives LTO5 8 drives LTO6 4 LTO7 ( 300 MB/s) 4 LTO8 ( 360 MB/s) each LTO8 drive is 360 MB/s about 10 K$ each Max : 24 * 360 = 8.64 GB/s to handle 1 GB/s : 4 drives about 40 K$ increase to 4 GB/s ( 1GB + dup + read ) about 120 K$ can upgrade all to LTO8 more : 200 K$ -> 8.64 GB/s need to write and read at same time LTO8 available in 2017 Need to let IT know our real needs might need more drives could do 8.64 GB/s for 200 K$ 19
Silo capabilities 2008 4 0.8 2010 5 1.5 2012 6 2.5 2015 7 6.25 2018 8 12.8 2020 9 25 2023 10 48 LTO capacity capacity compressed 1.6 3 6.25 15 32 62.5 120 price data rate data rate c 35 120 240 20 140 280 26 200 400 135 300 750 472 1180 708 1770 1100 2750 126 Total size silo 16.86 28.1 70.25 143.872 281 539.52 33.72 70.25 168.6 359.68 702.5 1348.8 Max size 28740 57480 47900 119750 119750 287400 245248 613120 479000 1197500 919680 2299200 Max rate 1680 3360 2400 4800 3600 9000 5664 14160 8496 21240 13200 33000
Full budget electronics Cost estimation FADC 250 Cables V1290 VME64X VETROC (MRPC ) TD VTP SSP VTP TS TID SD VXS crate VME CPU 1 crates per sectors 5800 2510 11000 11000 4000 3000 8000 5000 8000 4000 3000 2500 15000 3400 295 100 0 0 26 16 21 4 1 1 24 23 23 23 Total 1711000 251000 0 0 104000 48000 168000 20000 8000 4000 72000 57500 345000 78200 SRS computers Shielding 50000 1 1 50000 50000 Total 2966700 Total detectors 2966700 Total minus 188 FADs 1876300
High Voltage 4710 detector channels need HV ( ECAL, SPD, Cerenkov) assume reuse SBS and NPS HV available (2500 + 1000 = 3500) Buy remaining HV and cable new Included man power for HV and cables testing Total : 793.3 K$ in HV and cables Slow controls Gas systems for Cerenkov detectors High Voltage Design : 112K$ Implementation : 413.7 K$ Total 525.7 K$
Budget estimate R&D WBS Activity # Activity Name Costed Labor Contrib Labor Total Labor Labor Cost Procurement Total Cost Cost 1.1.5.1 1.1.5.2 1.1.5.3 1.1.5.4 1.1.5.5 1.1.5 DAQ/Electronics design Detector Power and Cabling Slow Controls Electronics Shielding Detector tests and prototyping DAQ/Electronics/Controls 65.00 5.00 44.00 2.00 25.00 141.00 1.00 0.00 0.00 0.00 6.00 7.00 66.00 5.00 44.00 2.00 31.00 148.00 $165.10 $12.70 $111.76 $5.08 $63.50 $358.14 $0.00 $0.00 $0.00 $0.00 $184.50 $184.50 $165.10 $12.70 $111.76 $5.08 $248.00 $542.64 Implementation and construction WBS Activity # Activity Name Costed Labor Contrib Labor Total Labor Labor Cost Procurement Total Cost Cost $1,766.40 $793.30 $20.00 $0.00 $100.00 $2,679.70 1.2.5.1 1.2.5.2 1.2.5.4 1.2.5.5 1.2.5.6 1.2.5 DAQ Electronics Detector Power and cabling Slow Controls Setup and Testing Shielding hut DAQ/Electronics/Controls 205.00 50.00 155.00 101.00 8.00 519.00 18.00 0.00 0.00 19.00 0.00 37.00 223.00 50.00 155.00 120.00 8.00 556.00 $520.70 $127.00 $393.70 $256.54 $20.32 $1,318.26 $2,287.10 $920.30 $413.70 $256.54 $120.32 $3,997.96
EHS hazards Risks associated with DAQ are low Fire hazards High power crate VXS crates enclosed High Voltage Low current
Conclusion Requirements 3 GB/s for PVDIS ( 20 KHz per sector ) and SIDIS ( 100 KHz trigger rate) Upgrade to 2x10 gigE for SBS, scale to SoLID 2x40gigE= 10 GB/s network SILO capabilities sufficient
Testing Dependencies
Dependencies FADC GEM HV SILO To Thia
Tape Cost 2018 DLO8 in $ 2020 LTO 9 2023 LTO10 Days Data rate Seconds Total data TB Double E12-11-108 Pol proton 120 3900 10368000 40435 80870 473850 242611 126360 E12-12-006 J/Psi 60 4000 5184000 20736 41472 243000 124416 64800 E12-10-006 Transv. Pol. 3He 90 6000 7776000 46656 93312 546750 279936 145800 E12-11-007 Long. Pol. 3 He 35 6000 3024000 18144 36288 212625 108864 56700 E12-10-007 PVDIS 169 6000 14601600 87610 175219 1026675 525658 273780 Total 474 40953600 213581 427162 2502900 1281485 667440 Cost tape Actual days 948 Actual years 2.60 Time in s 40953600 474 Tapes 2018 DLO8 in $ 2020 LTO 9 2023 LTO10 Days Data rate Seconds Total data TB Double E12-11-108 Pol proton 120 3900 10368000 40435 80870 6318 3235 1685 E12-12-006 J/Psi 60 4000 5184000 20736 41472 3240 1659 864 E12-10-006 Transv. Pol. 3He 90 6000 7776000 46656 93312 7290 3732 1944 E12-11-007 Long. Pol. 3 He 35 6000 3024000 18144 36288 2835 1452 756 E12-10-007 PVDIS 169 6000 14601600 87610 175219 13689 7009 3650 Number of tapes Total 474 40953600 213581 427162 33372 17086 8899 Actual days 948 Actual years 2.60 Time in s 40953600 474
SAMPA occupancies SIDIS ( 160 ns shaping ) Chamber 1 sample % 6 samples % 6 samples Noise cut % 9 samples % 9 samples Noise cut % 1 4.0 10 4.33 8.5 6.1 2 13.7 26.4 11 30.3 13.2 3 5.79 14.2 6.14 17.9 8.38 4 3.76 9.2 3.93 11.8 5.56 5 3.36 8.67 3.80 11.3 5.43 6 2.50 6.5 2.85 8.53 4.10
SAMPA data rates SIDIS ( 160 ns shaping ) Occupancies higher than with APV25 Data rates assuming processing and recording one amplitude for 100 KHz 1 samples : 4.4 GB/s 6 samples : 4.2 GB/s 9 samples : 5.7 GB/s Need to evaluate if tracking can be improved offline if record more samples in data file Data reduction on the fly desired with additionnal processing than noise cut
SAMPA tracking efficiency with full background
GEM APV readout with SSP Implementation of noise rejection on SSP for SBS Need to evaluate rejection factor for SoLID background Check ultimate performance for trigger rates
