1. LHCb Outer Tracker Upgrade Developments
T.Sluijk , Albert Zwart
Photo: One the 12
Outer Tracker Cframes ready
for installation, but
Not yet equipped
with 36 Front Ends
At the module ends
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

2. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
The option of Keeping the OT as Straw Detector
- Install everything new in shutdown in 2014
- Change centre area of OT in view of occupancy More Inner Tracker silicon in center
- Detector modules remain the same format 128 CH
- All data to farm, readout at 40MHz, no zero data suppress preferred
Front End : Same housing HV and Amp ; New TDC and OUTPUTS
Maybe 1 Ribbon per FE (MPO connector)
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

3. LHCb OT Electronics Upgrade Developments, T.Sluijk, A.Zwart
Attack of some Eye Catching Problems
New TDC choice - New Otis asic only needed for High SLHC levels after We need info here 30Krad/10y on OT Front Ends? (understaffed, long development times, change to 130nm technique?) -TDC in Rad tol FPGA can be used for Pre-SLHC levels 2014 – 2018 only Kilorad /4 years Total dose on FE’s
Data Transmission is bottleneck
Smaller problems:
Regulators , ADC, DAC for thresholds (now in OTIS)
New Control compatible with GBT (TFC and ECS)
Make 432 partly-new Front Ends (exchangeable units)
Install new cabling (also in C-frames)
LHCb OT Electronics Upgrade Developments, T.Sluijk, A.Zwart

4. Optical Transmission from Frond Ends out of radiation Area
LHCb OT Electronics Upgrade Developments, T.Sluijk, A.Zwart

5. Best Solution For Optical Transmission For the LHCb Outer Tracker
Single Fiber (not sure if present Multimode supports nm) -> Data fiber installation could stay the same (also still using present TFC and Specs) - promising “unlimited bandwidth”
Cern versatile dual link with GBT - Compatible with all detectors at CERN - Promising “high bandwidth”
Single Ribbon (12 fibers parallel) - Boring, already in use at 1.6GBPS / CH bandwidth outside radiation
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

6. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Present Outer Tracker Front End Parts 1 1 1
Otis2- #1 8
Single
Multimode Fiber
Re-use? 32 32
Otis2- #2
VCSEL
GOL
1.2Gb/s
Otis2- #3
Otis
GOL
Contol
and Supply
change HV
and
ASD
Stay the
same
Otis2- #4 32
128
3 Supply
regulators
Specs
control
TFC
Tim & trig
Fiber
Cat5
Copper Cable
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

7. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
ELECTRONIC outputs are limiting speed
TO ~5Gbps/laser so 16 TDC ch per laser 1
Otis2-2 #1 1 16 8
Otis2-2 #2
4.8 GBPS raw,
3.2 Gb/s DATA
GBT
GBT 32
Otis2-2 #3 1 16 8
Otis2- #4
GBT
GBT
Otis2- #5 1 16 8
Otis2- #6
GBT
GBT
Otis2- #7 1 16 8
Otis2- #8
GBT
GBT
128
JTAG
GBT SCA
I2C
GBT
One Wire
CLK/TFC
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

8. Why Single Fiber solution
Re-use of data fiber infrastructure
We need more 5Gbps channels on this fiber so WDM Wavelength Division Multiplexing
Coarse WDM standard for uncooled lasers
nm , 20nm spacing telecom.
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

9. Outer Tracker Upgrade SINGLE FIBER SOLUTION for data Transmission
Overview of CWDM Data Transmission Solution
Electrical 5Gb/s
TELL40
Reflective Electro Absorption Modulator
Laser1..8
DE-SER #1
SER #1,2
TDC32 #1
Front End #1
Optical 8* 5 Gb/s
Optical Isolator
DE-SER #1
SER #3,4
TDC32 #2
DE-SER #1
Single fiber
DE-SER #1
TDC32 #3
Optical 4*10 Gb/s
SER #5,6
DE-SER #1
SER #7,8
TDC32 #4
DE-SER #1
FPGA
With 5Gb/s links
8 CH De-Mult WDM
DE-SER #1
DE-SER #1
Coarse Wavelength Division Multiplexer
(60Eu/ch)
Laser 8
8 PIN diode detectors
8 de-serializers
1. Laser in Radiation Safe Area
2. Reflective modulators in Front Ends (Ga As) rad tol ?
(no polarization mod found)
3. Most effective at highest speeds
4. Speed limited by electronics
WDM=
Wavelength
Division
Multiplexing=
“Different Colors”
Front End # 432

10. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Cost of Single fiber CWDM solution
Tell40 side:
8 laser 1000E
8 Isolator 4000E
1 CWDM demux 500E
8 pin diode det 5gb/s 400E
8 amp chips 240E
Total: ~6 KEu /FE
FE Side :
8 drivers 8*25E=200
8 modulators 8*1200E=9600
1 CWDM multiplexer 500E
Total: ~10KEu /FE
Fiber:
100m fiber 100E
4 fiber connectors 100E 2 chassis parts 50E
2 patch panels 20E
Total ~250Eu / FE
Total 432 FE: ~16K * 432= ~6.9 M Euro
Conclusion:
Expensive
Complex
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

11. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Present CERN VERSATILE LINK development
Bi directional 3.2Gbps-data rate
based on GBT 130nm chip called GBT13
Bidirectional means :
Timing and control to Front End
Data from FE to Tell boards (computers)
Both Gbps data rate
ROSA=
Receiver Optical Sub Assembly
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

12. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Cern Versatile link solution
NEW FRONT END WITH MULTIPLE, BIDIRECTIONAL
VESATILE GBT LINKS NOT A GOOD SOLUTION
TOO MANY FIBERS, TOO MANY TRANSCEIVERS 1 32
128
GBT
3.2 Gb/s DATA #8
Otis2-2 #1 16 8
Otis2-2 #2
Otis2-2 #3
Otis2- #4
Otis2- #5
Otis2- #6
Otis2- #7
Otis2- #8 #1 #9
GBT SCA
JTAG
I2C
One Wire
CLK/TFC
dual transceiver estimate 400 E
9*400=3.6 K
3.6*432 =1.5M
For Front Ends only
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

13. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Conclusion
Nicely compatible
Rad tolerant
Not compact for front End if we need 8-12 CH
Change of infrastructure, dual links
Next step is to combine versatile link into Ribbon(12) and MT or Snap12 connector For compact cabling and Front end
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

14. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Presently used transceivers can almost do it
Avago
Tell1 opto board
transceivers
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

15. New snap12 units can do it better 6.5 Gbps,
GBT limits to 3.2 GBPS net (4.8 with err corr)
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

16. SINGLE RIBBON12 OUTPUT PER FRONT END
SEEMS GOOD SOLUTION, Rad hard or SLHC? 1 32
128
GBT
# 1
# 8
Otis2- #1 16 8
Otis2- #2
Otis2- #3
Otis2- #4
Otis2- #5
Otis2- #6
Otis2- #7
Otis2- #8
12 VCSEL
TRANSM #9
GBT SCA
JTAG
I2C
One Wire
CLK/TFC
1 RIBBON
WITH MPO12
CONNECTOR
Dual fiber
* GBT garanties compatibilty
with all detectors
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

17. 432 Ribbons needed for Outer Tracker
(excl spare)
FE1
FE9
FE10
FE18
FE19
FE27
FE28
FE36
18 ribbons in 1 cable
Cframe with 36 Front Ends
36 RIBBONS NEEDED FOR EACH OF THE
12 C FRAMES IN OUTER TRACKER = 432 EX SPARES
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

18. A Ribbon bundle can be small 8 Ribbons in tight bundle =1*1cm square
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

19. Space used by 56 multi ribbon cables
to barracks in tunnel groove, now 6
(Multi mode 5Gbps safe over 100m max)
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

20. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
More Bandwidth and Redundancy for a Broken VCSEL
or fiber with an added multiplexor
(Atlas experienced
broken vcsels or links) 1
Otis2- #1 1 16 8
Otis2- #2
GBT
# 1
GBT 32
Otis2- #3 1 16 8
Otis2- #4
GBT
12 VCSEL
TRANSM
GBT
Otis2- #5 1 16 8
Otis2- #6
FPGA / MUX
GBT
RIBBON12
GBT
Otis2- #7 1 16 8
Otis2- #8
GBT
GBT
# 8
128
GBT
# 9
GBT
# 10
GBT
#11
GBT SCA
JTAG
I2C
One Wire
CLK/TFC
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

21. Radiation Potection Wall
The “Ribbon +Duo per Front End” Solution -- With Separate TFC and ECS
8 m
25 m
51-55 m
3 m
Ribbon with 12 fibers
Radiation Potection Wall
Cframe Patch Panel
Tell x board
8 ribbon12 cable 96 fibers
FE 12 fold fiberoptic
Transmitter
HFBR775
FE GBT receiver
Barrack Patch Panel
N 12 fold fiberoptic
Receiver
HFBR785
Cframe MPO-MPO
Cavern MPO-MPO
TFC + ECS 2
Tunnel
Optical Splitter

22. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Ideal : Single Ribbon to Front End
1. Data from FE to Tell 40 boards,
2. Control (TFC, ECS) coming from Tell40
Opto boards !
We need split ribbon for this.
Timing
and
Trigger
ECS
DAQ
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

23. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Front End with more Bandwidth and Redundancy for a Broken VCSEL
or fiber with an added multiplexor
(Atlas experienced
broken vcsels or links) 1
Otis2- #1 1 16 8
Otis2- #2
GBT
# 1
GBT
12 VCSEL
TRANSM 32
Otis2- #3 1 16 8
Otis2- #4
GBT
Split
Ribbon
GBT
Otis2- #5 1 16 8
Otis2- #6
FPGA / MUX
GBT
MPO12
conn
MPO12
conn
GBT
Otis2- #7 1 16 8
Otis2- #8
GBT
GBT
# 8
128
GBT
# 9
GBT
# 10
GBT
#11
GBT SCA
JTAG
I2C
One Wire
CLK/TFC
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

24. The “Single Ribbon per Front End” Solution – TFC and ECS on same Ribbon
Tunnel
Patch Panel MPO-MPO
Cframe Patch Panel
Radiation Potection Wall
Front End
Tell x board
Barrack Patch Panel
10 fibers
2 fibers
GBT Transceiver = TFC / ECS
Ribbon with 12 fibers
8 ribbon- cable (each 12 fibers)
FE 12 fold fiberoptic
Transmitter
HFBR775
GBT
Transceiver
channel
Split Optical cable
For testing
12 fold fiberoptic
Receiver
HFBR785
MPO-SC Cassette

25. Opto system installation
Barracks
1. Install fibers in frame
Shielding wall
D3C01
7. New Tell 5/40 for 480 ribbons
2. New fiber-patch-panel
6.New Patch Panel in Barrack D
ribbons in chain
5. New cables to barracks (60)
60 cables with 480 ribbons incl spare
4. New
Tunnel OT
Patch Panel
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

26. Cost Optics Outer Tracker excl spare
Detector:
FE Transceiver 432 * ~800 Euro= 345 K incl 12 gbt’s 1 versatile dual transc ~300*432=129k
Ribbon in Cframe 432 * 150E = 65 K
Patch panel in Cframe 12* 500= 6K
Split ribbon +2 MPO 432 *150 = 65K
total 610 K
To tunnel patch panels:
Ribbon 25m 432*150= 65K
Patch panels 432 “through” =5k
total 70k
Long distance 8-ribbon cable (54*55m)
432/8= 54 * 3000 Euro= total 162 K (formerly 24k incl spare)
Tell40 side:
PP =2K
patch cables 432*100 E=43200=43 K
Receivers + transm= 1.6k*432= 691 K
Split = 432* 100 E= 43k
total 779K
Material cost 1,621 M Euro=~1.6M (excl manpower)
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

27. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Studies
Radiation tolerant transmitter/rec for Front End with proof of working on 100m Multi Mode cable work with Atlas ad Cern Upgrade groups
TDC in FPGA (or asic, OTIS2)
Regulators substitutes
Fiber placement in Cframes (in situ?)
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

28. Radiation hard version of Transceiver study
(in cooperation with Atlas SCT/PIX)
-Electronics of commercial transceiver not radiation tolerant
-A combi of VCSEL and 12 GBT’s is very rad tol.
Opto pack developed by Atlas
Photo from
talk K.K. Gan
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

29. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Installation Remarks
Present DC cabling/supply can be used
Present ECS ,TFC and Control box will disappear
New 3A regulators needed for Front Ends
- New RibbonsFibers have to be put in cframes in situ
(maybe on outsides)
New ribbon 96 cables have to be put in floor or elsewhere for 5 Gbps <100m preferred
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart

30. LHCb OT Electronics Upgrade T.Sluijk, A.Zwart
Conclusion:
1 ribbon per Front End would be nice
8 fibers for data, 2 spare/redundant and
2 fibers for control channel
Rad tolerant transceiver could be beneficial
Do we go for SuperLHC and is levels?
Installation of fibers will be difficult
LHCb OT Electronics Upgrade T.Sluijk, A.Zwart