The CSC TrackFinder

1
The CSC Track-Finder
12 Sector Processors
From DT Track-Finder
MB1
DT TF
(Vienna)
1 Muon Sorter
SP
ME4
(Vienna)
OPTICAL
ME2-ME3
To Global Muon Trigger
ME1
SR
MS
3? / sector
PC
From CSC Port Cards
SP
24 Sector Receivers (12 for ME4)
12 sectors
GMT
4?
3? / port card
4?
(UCLA)
(Florida)
(Rice)
From DT Track-Finder
8?
RPC
2
Sector Receiver Functionality

• Receive 6 ? segments via 12 optical links from 2
  Muon Port Cards
• Require 3 Sector Receivers for one 60 sector
• Synchronize the data
• Reformat the data into track segment variables
• LCT bit pattern ? ?, ?, ?b, ...
• Apply corrections for alignment
• Communicate to Sector Processor via custom
  backplane (Channel Link)
• Fan out ME1/3 ? segments to DT Track-Finder

via LUTs
3
Sector Receiver Logic
Front Panel
VME
JTAG interface
Controller FPGA
Optical Fiber from MPC
To Barrel
Back FPGA
Optical Receiver
Deserializer
LUTS
LUTS
Front FPGA
Optical Fiber from MPC
Optical Receiver
Deserializer
To Backplane
Repeat for each Muon
4
Sector Processor Functionality

• Accumulate track segments for possibly more than
  one B.X.
• Extrapolate in 3D from one station to another for
  all possible track segment combinations
• Assemble tracks from extrapolation results
• Select best 3 tracks and cancel ghosts
• Assign track parameters pT, ?, ?, quality

5
Sector Receiver/Processor DAQ
From trigger primitives
To CSC DAQ
Store all input data600 bits/sector/b.x.
Store all output data60 bits/sector/b.x.
6
CSC TF DAQ Bandwidth

• Send input of Sector Receiver (output of Muon
  Port Card) and output of Sector Processor (input
  of CSC Muon Sorter) to DAQ stream for
  diagnostics
• Send 660 bits per L1A per Sector
  Receiver/Processor
• 12 sectors and 100 kHz L1A rate ? 100 MB/s
• One S-LINK64 handles 200 MB/s
• Note that trigger data is expected to be sparse,
  so this bandwidth could be compressed if needed
• CSC Track-Finder DAQ acts as additional DDU for
  CSC system (plan to use existing DDU design)

7
Mirror CSC DAQ Path
DAQ MBs send data from front-end
CSC DDU designed by Ohio State Univ.
18 optical fibers
? 30
Sector Processors send L1 data
12 optical fibers
1
DDU
SLINK