1. ATLAS Canada Alberta Carleton McGill Montréal Simon Fraser Toronto
TRIUMF
UBC
Victoria
York
33 University/Lab.physicists Over 88 people, including Engineers, Technicians, Students
Includes 3 IPP Research Scientists
Educational Role
20 UG Summer Students
21 Graduate Students
13 Post Docs
Focus on Liquid Argon Calorimetry
4 NSERC Funded Construction Projects
Endcap Hadronic Calorimeter
Forward Hadronic Calorimeter
Front-End-Board Electronics
Endcap Signal Cryogenics Feedthroughs
Construction completed last year
End of Installation this year
Commissioning in 2006
Ongoing/Future Activities
Analysis of Beam Tests
Calorimeter Calibration
Preparation for Physics
Event Filter Algorithms/Ops
Computing - soft/hard
Beam Condition Monitors
11/18/2018

2. Why Is It Called a Calorimeter?
Liquid Argon/Metal
Charged Particle
Kinetic Energy of Particle
Converted to Ionization
Of Liquid Argon
Electrical Signal
Proportional to
Incoming Energy
Why Is It Called a Calorimeter?
Readout Electronics
11/18/2018

3. Calorimeters as Physics Tools
Forward Jet Identification

4. University of Victoria
Cryogenic Signal Feedthroughs
Over 180k signal channels in the LAr calorimeter
High density and reliability required:
1920 pins per feedthrough unit
University of Victoria
TRIUMF
11/18/2018

5. Hadronic Endcap Calorimeter
Front Wheel
2 Front and Rear
Modules
Rear Wheel
Wheel Assembly
Composed of 2 wheels per end
Front wheel:67 t 25 mm Cu plates
Back wheel:90 t 50 mm Cu plates
TRIUMF, Alberta
11/18/2018

6. HEC 2 A-wheel on the insertion stand, Aug. 2004
11/18/2018

7. Tungsten-Copper Internal Structure
Forward Calorimeter
Four Modules
Each 0.9 m Diam, 0.45 m long
Total 20 Tonnes Tungsten
Carleton, Toronto
FCAL1
FCAL3
FCAL2
Plug3
Completed Module
Tungsten-Copper Internal Structure
11/18/2018

8. LAr Forward Calorimeters
FCAL Carleton, Toronto
11/18/2018

9. EndCap A Last HEC wheel inserted Oct 04, FCal insertion early 2005
11/18/2018

10. EndCap C … Final Integration
Closed Aug 04, cold tested in B180, now at Point 1
11/18/2018

11. Trigger, DAQ and Detector Control
Calo MuTrCh
Other detectors
40 MHz
40 MHz
75 kHz
~2 kHz
~ 200 Hz LV L1 D E T
R/O
Read-Out Drivers
FE Pipelines
Read-Out Sub-systems
Read-Out Buffers
Read-Out Links
2.5 ms
LVL2
~ 10 ms
ROIB
L2P
L2SV
L2N
RoI
RoI data = 1-2%
requests
Lvl1 acc = 75 kHz
ROD
ROD
ROD
120 GB/s
~ 300 MB/s
~2+4 GB/s
ROS
GB/s
ROB H L T D A T F L O W
RoI Builder
L2 Supervisor
L2 N/work
L2 Proc Unit EB
SFI
EBN
DFM
Lvl2 acc = ~2 kHz
Event Building N/work
Dataflow Manager
Sub-Farm Input
Event Builder
EFN
SFO
Event Filter
EFP
~ sec
~4 GB/s
EFacc = ~0.2 kHz
Event Filter N/work
Sub-Farm Output
Event Filter
Processors
11/18/2018

12. High Level Trigger Principal focus Combined Testbeam
LVL2 muon slice fully integrated in H8 combined testbeam
Fast LVL2 m reconstruction, and detector description infrastructure integrated
TrigMoore EF m reconstruction integrated
Steering of TrigMoore from LVL2 result implemented
These integration tests are the first demonstration of a complete HLT chain with algorithms in an online setup, reading out directly detectors
ID LVL2 tracking algorithms integrated and run in the testbeam
CaloRec in EF
Timing algorithm & data preparation timing studies
Extensive testing of the event selection steering component
Online histogramming
11/18/2018

13. TDAQ Setup in Combined Test Beam
LVL1
DFM
gateway
in bdg.513
SFI
Tracker
Calo
Muon det.
LVL1 calo
ROS
RPC
TGC
CSC
LVL1 mu
Tile
TRT
SCT
Pixel
LAr
MDT
monitoring
run control
pROS
data network (GbE)
MAGNI farm
in bdg. 513
SFO
remote farms
storage
CASTOR (IT)
LVL2
farm in H8
EF farm
Compared to ATLAS
~10% of DAQ
~2% of HLT
just counting PCs…
11/18/2018

14. LAr Front End Electronics
Development and fabrication on track for most components, boards
Issues:
- Still have a delay in the rad-hard ST negative voltage regulators.
- Rad-tolerant low voltage power supplies finally in fabrication
- Problem encountered with a special timing circuit (QPLL)
FE board production is currently stopped
Rad-tolerant FE board
(1524 boards, each 128 channels)
Power supply
Front-end crate electronics
11/18/2018

15. Front-End Board Schedule
Switched Capacitor Array
Light Blue is schedule before Delay at Bottom
2003 October: full 14 board test.
2004 March: start of front-end board production
2004 November: begin front-end board installation (1.25 days/crate)
Stopped late summer due to QPLL problems
Solution found – mezzanine board
Resume Production Feb 2005
Six Month Delay
No Final Schedule at present for Installation
Not affected by production delay
Jan 05 – Aug 05: Phase 1 – EM barrel at truck
Aug 05 – Sep 05 : Phase 2 – EM Barrel at IP
Dec 05 – Jul 06: Endcap C
Feb 06 – Aug 06: Endcap A
SCA Controller
11/18/2018

16. Calorimeter Front-End-Board Electronics
Radiation Hard Logic to Control Calorimeter Signal Readout
Design, Testing, Implementation
Alberta
11/18/2018