1. Toward a costing model What next? Technology decision n Schedule
n Organization
P. Le Dû
CEA DAPNIA Saclay

2. LC beam structure Decision Cold Warm / // / / // /
150 Hz
120 Hz
Cold
Warm
5 Hz
2820 bunches
85 bunches
190 bunches / // / / // /
199 ms
6.6 ms
1ms
238 ns
238 ns
Relatively long time between bunch trains : 199 ms
Rather long time between bunches: 337 ns
Rather long bunch trains ( same order as detector read-out time: ms
Relatively long time between bunch trains (same order as read-out time): 6.6 ms
Very short time between bunches: 2.8 ns/1.4 ns
Rather short pulses : 238 ns

3. Software trigger concept No hardware trigger
Data Flow
Software trigger concept No hardware trigger
Detector
Front End
Sub-Detector Read-out ( event by event or BT)
Signal processing -digitization
Perform Zero suppression and/or data compression
Local Buffering – dead time free pipeline
Read-Out
Buffer
1 ms
3000 Hz
Switching
Network
Data Collection is triggered by every train crossing
Full event building of one bunch train
Software Selection
Sequential selection (equivalent to L1-L2-L3 …) with off line algorithms
Event classification according to
physics, calibration and machine needs
Select bunch of interest
Processor
Farm
1 MBytes
Average
event size
200 ms
30Hz
On-line processing  Event Filtering …..
Few sec
Storage &
Analysis
Data streams S1 S2 S3 S4 Sn

4. Tesla Architecture VTX SIT FDT TPC FCH LAT Event building Network P P
Detector Channels
799 M
300 K
40 M
1.2 M
20 K
32 M
200 K
75 K
40 K
20 K
VTX
SIT
FDT
TPC
FCH
ECAL
HCAL
MUON
LAT
LCAL
8 MB
1 MB
2 MB
110 MB
1 MB
90 MB
3 MB
1 MB
1 MB
1 MB
Detector Buffering (per bunch train in Mbytes/sec)
Gb Links
Event
manager
& Control
Event building
Network
10 Gbit/sec
(LHC CMS 500 Gb/s)
Processor farm (one bunch train per processor) P P P P P P P P P P P P P P P P
Computing ressources (Storage & analysis farm)
30 Mbytes/sec  300TBytes/year

5. Consequencies and tasks
Schedule of milestones 2005, 2007,2009
First one for next LCWS ( april 2005)  simple and short document!
Define a list of technical issues and challenges to be addressed
Define ‘ clearly’ the boundaries’ between the various systems
T/DAQ
Subdetector RO
GDN
Machine …
Study in parallel 2 models of detectors (LD & SiD)
Estimate number of channels, bandwidth
Estimate quantity of hardware (interfaces, processors, links … ), sofware ? and manpower ( is LHC a good model?)
Build a wordwide ‘international ‘long term’strong team
Europ,North America and Asia  meetings
Include long term sociology  NOT reinventing the wheel!

6. Boundaries  Global MODEL
Subdetectors
Front End
Sdet RO chain
FE Buffer interface
Calibration
monitoring
Alignment
GDN
Detector Integration
Running modes
Local stand alone
Test
Global RUN
Remote
slow control
Monitoring
Machine
Synchronization
Detector feedback
Beam BT adjustment
Uniform interface
Global synchronisation
Partitionning
(physical and logical)
OFF line ????
GRID …..
Final storage ???
Analysis, MC ???
Modelling?
Which protiotype?
T/DAQ
Bunch Train Buffer interfaces
Links and Event Building
Control - supervisor
On line Processing
(SW trigger & algorithms
(calib,monitoring and physics)
Local Data logging

7. FLC ‘today’ Network model
Local/global
Remote
Control
On-Detector Front End RO
(Silicon On Chip)

Interface: Intelligent
PCI ‘mezzanines’
Synchro
Run Control
Detector
Read-Out
Node
Monitoring
Histograms
Sub detector
farm
Local partition
Dataflow
Manager
Event Display
Distributed Global NetworK
Machine
DCS
On-Line
Processing
Databases
High Level
Trigger Farm
Analysis
Farm
Mass storage
Data logging
...

8. Victoria workshop Introduction
   Introduction
usha mallik (The University of Iowa) File: usha_mallik.doc [21.0 KB] 19:13 29 Jul 2004
   Linear Collider DAQ
J.J. Russell (Stanford Linear Accelerator Center) File: j.j._russell.ppt [38.5 KB] 19:21 29 Jul 2004
   Present and Future DAQ
Patrick Le Du (Saclay) File: patrick_le_du.ppt [651 KB] 19:44 29 Jul 2004
Tom Markiewicz (Stanford Linear Accelerator Center) File: tom_markiewicz.ppt [295 KB] 19:53 29 Jul 2004
   Machine Detector Interface DAQ Issues
Eric Torrence (University of Oregon) File: eric_torrence.pdf [264 KB] 19:57 29 Jul 2004
   DAQ at a warm LC
tomas markiewicz (SLAC) File: tomas_markiewicz.ppt [612 KB] 15:14 03 Aug 2004
   Global Detector Network
Rick2 Van Kooten (Indiana University) File: rick2_van_kooten.pdf [12.5 MB] 20:40 03 Aug 2004