klm electronics 17sep2010 - phys.hawaii.eduidlab/taskandschedule/klm/klm... · trigger module...
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iTOP & KLM Electronics• US Role in Electronics and Trigger/DAQ• US Role in Electronics and Trigger/DAQ
1G. Varner 17-SEP-2010 Indiana University Introduction
High Luminosity B-factoryAt L = 8 x 1035 cm-2/s :• Pipelined readout: pe ed eadout:128k channels equiv., 40MHz x 2bytes
80 Tera-bytes per second! (2,000 DVDs per second)y p
Global Decision logic trigger: 30kHz• FIFO: 128k channels equiv 16 bytes• FIFO: 128k channels equiv., 16 bytes
60 Giga-bytes per second! (200 GbE links)
COPPER, online Farm
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300-500 Mega-bytes per second! (max. data rate to disk)
High LuminosityAt L = 8 x 1035 cm-2/s :• Pipelined readout: pe ed eadout:128k channels equiv., 40MHz x 2bytes
80 Tera-bytes per second! (10,000 CDs per second)y p
Global Decision logic trigger: 30kHz• FIFO: 128k channels equiv 16 bytes• FIFO: 128k channels equiv., 16 bytes
60 Giga-bytes per second! (200 GbE links)
COPPER, online Farm
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300-500 Mega-bytes per second! (max. data rate to disk)
Comparable to LHC experiments
Belle/Belle II Common Electronics
FIFOFIFO
Local Bus PCI Bus
tor S
igna
lsFINESSEFINESSE BridgeBridge
Mezzanine Cards
FIFOFIFO
FIFOFIFO MemoryMemory
BridgeDet
ect
FINESSEFINESSE
FINESSEFINESSE
PCI Mezzanine Cards
FIFOFIFO CPUCPUFINESSEFINESSE
Trigger interruptControlControl BridgeBridge
• COPPER (COmmon Pipelined Platform for Electronics Readout)
Trigger inputgg p
• Used in J-PARC experiments
• Card ~ crate – aid in data reduction
• On board data reduction
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• On board data reduction
• FINESSE (Frontend Instrumentation Entity for Subdetector Specific Electronics)
COPPER board RadiSys EPC-6315
– Intel P3 800 MHz256 MB memory
FINESSE×4(or 2 double sized)
– 256 MB memory– Network boot– RedHat Linux 9onboard CPU
(online data reduction, etc…)(or 2 double sized) (online data reduction, etc…)
VME9U
Trigger module
100BaseT port×2b t/ t l d t t f For Belle II:
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boot/control, data transfer For Belle II: upgrade CPU,
network to 1Gbit
Belle II Barrel-PID DAQ SummarySame numbers in either detector configuration
128 DAQ fiber transceivers
8k channels
32 FINESSE8 COPPER
1k BLAB3128 SRM
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Scintillator for endcap KLM
The geometry is fixed by the 4cm gaps of the iron magnet flux return yoke
RPC frame
g y
Two independent (x and y) layers in each superlayer composed of rectangular strips (L=0.6–2.8 m)
Photodetector (one per strip) is a Geiger mode Avalanche Photodiode (GAPD)
Outer dead zone is ~ 3%
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Scintillator option for endcap KLM• Plastic scintillator + WLS fiber read out successful in many neutrino
experiments (MINOS, MINERva, OPERA, T2K near detector), because of relatively low price high reliability because of relatively low price, high reliability.
Scintillator strips for OPERA target tracker
• Belle II has high rate and high occupancy• Belle-II has high rate and high occupancy
• The choice of photodetector:
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p– Photomulitpliers are bulky and magnetic field. – New multipixel Si photo diodes operating in Geiger mode are tiny and insensitive to the
magnetic field.
Geiger-mode APDsh
Al
Matrix of independent tiny pixels arranged on a common substrate (200−2000 pixels)
R 50DepletionRegion2 m Substrate
Each pixel operates in a self-quenching Geiger mode with gain ~106.Ubias
Photon detection Efficiency ~30%
Compact: typical matrix size ~ 1 × 1 mm2
Relatively Cheap: 20−30$/device
Insensitive to magnetic fieldsInsensitive to magnetic fields
Radiation hardness is sufficient for the endcap
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Noise is 100kHz − 2MHz not a problem: 5 p.e. threshold reduces rate to < 1kHz while maintaining ~ 99% MIP efficiency
Endcap KLM Readout uses “oscilloscope on a chip”
110 DAQ fiber transceivers
28k channels1.8k TARGET2
transceivers28 FINESSE7 COPPER
110 SRM
TARGETKLM Si PMs
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KLM – Si-PMsResolve individual p.e.
Barrel KLM Readout – very similar
110 DAQ fiber transceiverstransceivers
28 FINESSE7 COPPER
28k channels1.8k 16-channel
Waveform samplingASICs
110 SRM
Barrel KLM Readout18
Barrel KLM Readout – No ASIC – FPGA as digitizer
Schedule, Organization & Manpower
• DOE support level TBD (Intensity Frontier Rev)
• Project moving forward – 2013 completion, 2014 running (complete R&D “soon”) start2014 running (complete R&D soon ) start production
• Manpower limited, define partionable tasks
• Work packages and task sharing
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Questions?How to start?
iTOP Readout concept
Top ViewTop View2x 64-channel PMTs per fiber link
56x BLAB3 daughtercards (112x BLAB3)896 PMT channels/mod le (16 iTOP sta es)
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896 PMT channels/module (16 iTOP staves) 7 data, 7 trigger fiber pairs + HV power, LVDS
RF clock, Revolution marker pairs
BLAB timing performance:
• Comparable performance to best
CH1
CFD + HPTDC• MUCH lower power, no
d f h bl CH2need for huge cable plant!
• Using full samples
CH2
Using full samples significantly reduces the impact of noise
6 4 RMS• Photodetector limited 6.4 psRMS
22Advanced Detector Research award
NIM A602 (2009) 438
Photo-detector: Hamamatsu SL-10A i t 1” 1”• Approximate 1” x 1”
• 4 x 4 multi-anode• Interesting mechanical
challenges (case at HV)g ( )• Lifetime protection
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SL-10 Timing PerformanceNagoya Hawai’iNagoya Hawai i
σ 38 37σ ~ 38.37
N f i di i i CAMAC• Nagoya = constant fraction discriminator + CAMAC ADC/TDC H i’i f li + f t t ti
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• Hawai’i = waveform sampling + feature extraction
Initial read-out electronics concept: fully integrated modules (too big)
100mm high147mm long
Current read-out concept: split modules for access and coolingCurrent read out concept: split modules for access and cooling
66.5mm high
front-end transceivermodule
transceiver module
2577mm long
iTOP with expansion volume and split electronics modules
transceiver modules: 100mm x 55mm x 25mm
front-end module: +PMTs
Access opening limits size
to front-end moduleto DAQ
p gof front-end electronics!
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DSP_FIN• 500 MHz processor per core• 32x waveform channels per
Dual Core DSP
core
Dual Core DSP 128 MB SDRAM2.54 GB/s
284x Fiber Optic Connections
Dual Core DSP 128 MB SDRAM28
127 MHz