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The NA60 Experiment Readout Architecture. M.Floris , D.Marras, G.Usai, A.David, P.Rosinsky, H.Ohnishi for the NA60 Collaboration. 13 th IEEE- NPSS Real Time Conference 2003, Hotel Omni Mont Royal, Montreal, Canada, May 18 – 23 2003. The NA60 Experiment. LEP/LHC. NA60. SPS. - PowerPoint PPT Presentation
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The NA60 Experiment Readout Architecture
M.Floris, D.Marras, G.Usai, A.David, P.Rosinsky, H.Ohnishi for
the NA60 Collaboration
13th IEEE- NPSS Real Time Conference 2003,Hotel Omni Mont Royal, Montreal, Canada,
May 18 – 23 2003
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 2
The NA60 Experiment
Fixed target experiment at CERN SPSHeavy Ion / Dimuon experiment
Open charm and prompt dimuon production
Talk Outline: Apparatus DAQ Architecture Readout Electronics Conclusions
NA60
SPS
LEP/LHC
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 3
Detector Concept and Layout
4 Detectors: Muon Spectrometer
(MWPCs, Trigger hodoscopes)
ZDC Beam Tracker Vertex Detector
Tracking MWPCs
Trigger hodoscopes
Toroidal Magnet
FewallMuon filter
ZDC and Quartz Blade
TARGET AREA
MUON SPECTROMETER~1m
MUON FILTER
BEAMTRACKER
TARGETBOX
TELESCOPE
Dipole field2.5 T
BEAM
IC
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 4
DAQ Overview
DetectorDetector DetectorDetectorDetectorDetector
LDC
GDC Castor/CDRburst
interburst
burst
events - trigger
DATEALICE
System is organized in indipendent partitions
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 5
PCI System
Many partitions A General-purpose PCI
card Many detector-specific
mezzanines
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 6
Readout Chain Overview
MEZZANINE 1
MEZZANINE 2
MEZZANINE 3
MEZZANINE 4
PCI Card
PCI Card
PCI Card
PCI Card
LDC
LDCPC
I B
US
Acquisition software(DATE)
DET.1
DET.2
DET.3
DET.4
BURST
INTERBURST
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 7
10
Hardware/Software Handshake
#0#1#2#3
10 1011 11 11
AcquisitionSoftware
00: idle10: burst11: interburst
bits 0-1: SPS statusbit 2: R/O statusbit3: timeout
timeout
At the end of the burst
HW sets bit 2
SW starts as soon as bit 2 is set and resets it at the end
If a new burst arrives while SW is still reading bit
3 is set
BURST
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 8
PCI Card Architecture
PCIinterface
application
RAM
Registers
Controllogic
mez.
PCICTRL
BURST
INTERBURST
det.
PCI Card
• FPGA
• Large memory buffer
• Mezzanine Cards
• Registers
Light blue: blocks inside FPGA
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 9
First Implementation – PCI-FLIC
Developed by EP/ED-DTb CERN Division
PCI core embedded in ORCA FPGA
Successfully used in test beams in 2001/2002 Readout architecture validated
Has some limitations Slow FPGA Maintenance problems
A new card has been developed...
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 10
Final Implementation – PCI-CFD
New and faster ALTERA FPGAExternal PCI bridge (PLX 9030)X4 bandwidth
FPGA(APEX/20K100)
PLX9030PCI bridge
PMC connectors
for mezzanine
cards
64 MBytesRAM
Will be used in next NA60 run
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 11
CFD – FPGA Application
Readout
Event Formatting
RAM Writing
PCI Interface
BURST
INTERBURST
# total words (8bit)
readout time
# total words (8bit)
# event# burst
time of arrival
data 5
data 3
data 1
data 4
data 2
data N - 2data N - 1
data N
marker word
# data words (8bit)
errors
Data
Header
Trailer
31 0
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 12
Mezzanine 1 – VME-Like & CAMAC Protocols
Very simple mezzanine Level conversion ECL/NIM => TTL Protocol itself implemented in PCI Card FPGA
BURSTWARNINGTRIGGER
BUSY
Protocol control signals & data
PCICard
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 13
Mezzanine 1 – Protocols
2 different protocols implemented on this mezzanine: RMH Protocol (Muon Spectrometer MWPCs &
Hodoscopes) Fera (CAMAC) protocol (Beam Tracker & ZDC)
trigger
start_read
encodedflagdata
end_of_read
RMH Protocol
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 14
Mezzanine 2 - Pixel Detector
Alice PILOT chip, radhard, Pixel chip configuration and readout, GOL
interfacing
ALICE1LHCb Pixel chip, radhard, 256x32 cells (425 m x 50 m)
GOL, radhard high speed serial
link (GLink)
GOL (Pix DATA)
Pixel/PILOT (JTAG Conf.)
thanks…alice
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 15
Mezzanine 2 – Mezzanine Features
Complex mezzanine Can be interfaced to 2 pixel
planes R/O implemented in local
FPGA Zero Suppression Event formatting Error detection
PCI accesses FIFOs Detector configuration
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 16
Mezzanine 2 – Pixel Conf&Test Software
Mezzanine & pixel-chip configuration (JTAG)
Settings databaseDetector & R/O
Chip test Threshold scan Noisy and dead
pixelUsed by DATE at
run startup
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 17
Conclusions
A new readout system based on the PCI bus has been developed for a HEP experiment
High performances and flexibility, low costs Roadmap:
Muon spectrometer electronics commissioned October 2001
Beam Tracker and ZDC electronics used for the first time June 2002
Pixel Telescope intermediate system working on beam June & October 2002
Final system working in lab, will be used in data taking August 2003
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 18
Acknowledgements
The authors would like to thank the following people: CERN EP/ED-DTb group and in particular Hans
Muller for their contributions and suggestions in the early stages of the project
The Alice Pixel group and in particular F.Formenti, G.Stefanini, K.Wyllie, A.Kluge and M.Burns for their constant support to the NA60 pixel project
May 18-23 2003 13th IEEE-NPSS Real Time Conference 2003 19
NA60 Collaboration
50 people, 12 institutes, 7 countries
Lisbon
CERN Bern
Torino
Yerevan
Cagliari
LyonClermont
BNLRiken
Stony Brook
Palaiseau
R. Arnaldi, K. Banicz, K. Borer, J. Buytaert, J. Castor, B. Chaurand, W. Chen, B. Cheynis,C. Cicalò, A. Colla, P. Cortese, A. David, A. de Falco, N. de Marco, A. Devaux, A.
Devismes,A. Drees, L. Ducroux, H. En’yo, A. Ferretti, M. Floris, P. Force, A. Grigorian, J.Y. Grossiord,
N. Guettet, A. Guichard, H. Gulkanian, J. Heuser, M. Keil, L. Kluberg, Z. Li, C. Lourenço,J. Lozano, F. Manso, A. Masoni, A. Neves, H. Ohnishi, C. Oppedisano, G. Puddu,
E. Radermacher, P. Rosinský, E. Scomparin, J. Seixas, S. Serci, R. Shahoyan, E. Siddi, P. Sonderegger, G. Usai, H. Vardanyan and H. Wöhri
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