1. OFCU-RO status and plans
C. Fernández Bedoya
May 22nd 2012
CMS Upgrade Week

2. OFCu-RO rear transition modules
System made of various elements. Prototypes produced for all of them, rest coming really soon:
- OFCU-RO modules
2 types of backplanes (J2_OFCU, TIMBUS_OFCU)
- 1 slow control board (VME_patch)
- TSC_rear modules (for the TSC-ROS link)
-Being tested at lab at present. Results good so far.
Minicrate+CuOF mezz + CERN fiber + OFCU-RO + ROS
9U VME crate
OFCU-RO
C. F. Bedoya May 22nd, 2012 2

3. Drift Tubes Phase 1 Upgrade Plan
C. F. Bedoya May 22nd, 2012 3

4. Drift Tubes Phase 1 Upgrade Plan
C. F. Bedoya May 22nd, 2012 4

5. Drift Tubes Phase 1 Upgrade Plan
C. F. Bedoya May 22nd, 2012 5

6. Drift Tubes Phase 1 Upgrade Plan
0.87 dBm
LC adaptor
12ch-MTP fanout
MTP-MTP adapter
Trunk
Optical power attenuation
50 cm LC-LCfiber = -23,40 dBm
CERN fiber = -24,27 +/ dBm
Comparison patchcords
C. F. Bedoya May 22nd, 2012 6

7. Drift Tubes Phase 1 Upgrade Plan
Measuring while moving and routing the cable. From dBm to 24.60, Í was not respecting 40 cm bending diameter
C. F. Bedoya May 22nd, 2012 7

8. Drift Tubes Phase 1 Upgrade Plan
MTP 12 ch
MTP 12 ch
Slow control
25th ch + TSC link
8 RJ-45 for ROS cables connection
Lines to transfer TSC data to ROS
C. F. Bedoya May 22nd, 2012 8

9. Drift Tubes Phase 1 Upgrade Plan
C. F. Bedoya May 22nd, 2012 9

10. CUOF Different input terminations, all work fine with RO 10
C. F. Bedoya May 22nd, 2012 10

11. CUOF Current consumption of CuOF With ROB data:
Bias=0d50 Mod=0d20 => 1.03 A
Bias=0d80 Mod=0d80 => 1.13 A
Bias=0d160 Mod=0d80 => 1.17 A
Bias=0d80 Mod=0d1600 => 1.21 A
Bias=0d50 Mod=0d1600 => 1.20 A => with SB output 1.23 A
C. F. Bedoya May 22nd, 2012 11

12. CUOF
On the table

13. OFCU 109º regulator 6.2 Volts input voltage 65º regulator
ambient temperature 29.6 ºC
3 channels receiving data on rigth receiver

14. CUOF BEFORE EQ channel 1 AFTER EQ channel 1
Orange cables: peak up noise?
Default: 100 nF cap in series and 100 ohm termination
C. F. Bedoya May 22nd, 2012 14

15. CUOF BEFORE EQ channel 6 AFTER EQ channel 6 Torino´s termination 15
C. F. Bedoya May 22nd, 2012 15

16. CUOF BEFORE EQ channel 3 AFTER EQ channel 3 Ala Bologna 16
C. F. Bedoya May 22nd, 2012 16

17. CUOF BEFORE EQ channel 5 AFTER EQ channel 5 Alternative
Resistors to VCC (10k) and GND (12 k) on each line after 100 nF capacitor and a 100 ohms termination resistor between lines
C. F. Bedoya May 22nd, 2012 17

18. Drift Tubes Phase 1 Upgrade Plan
I recommend you to measure the voltage at MONB and MONP resistors (the last one, you have to enable the fotodiode in the laser driver). If I configure the CuOF with Torino´s recommended values: Bias=0d50 (aprox 3.75 mA on vcsel) and modcurrent =0d20 (1.56mA on vcsel) the optical power I get from the 8 channels is (last number is the voltage I measure in MONB): ch1= dBm   ---  129 mV ch2=-11.43        mV ch3=-8.63      mV I need to put bias=160 to get -3 dBm
ch4=   mV ch5=-11.69    ch6=-8.95  ----  mV ch7=-6.83  mV ch8=-9.90   mV Part of the difference between channels (but only part) in my opinion is due to the fact that the LC fiber goes deeper in some vcsels than in others (with an LC cage I think it should work better). If I configure with bias=0d80 (6 mA) and mod=0d80 (6.24 mA) I get ch1=-5.94 dBm ch2=-5.79 ch3=-6.06 ch4=-4.66 ch5=-6.95 ch6=-5.82 ch7=-3.69 ch8= The reproducibility is not too bad, usually within 0.5 dBm.
Closed loop??? 2 channels MONP value oscillations
C. F. Bedoya May 22nd, 2012 18

19. Drift Tubes Phase 1 Upgrade Plan
When I left it running during the night with the first 3 channels and Torino´s values, the first two channels unlocked, while the 3rd was ok. I swapped the fibers and the next time, it was again the channels corresponding to the first ones in the CuOF that unlocked. I really think those values are too low. I cannot get the receiver working for Ibias<0d23 (it depends on the channels, some times it until bias <0d17) th Ibias =0d80 I get 208.9mV in MONB (first channel) with bias=0d160 I get mV in first channel.
C. F. Bedoya May 22nd, 2012 19

20. At the VCSEL input
Low mod current
Higher mod current

21. END

22. Fibers Length of the fibers is critical: Latency Skew in trigger links
* 96-fibers cable with MTP-12 connectors choosen
* 4 samples purchased to Draka through CERN-TS-EL-OF
* Evaluated, good performance (length tolerance, mechanical dimensions and optical properties)
* No constrains from installation point of view
Length of the fibers is critical:
Latency
Skew in trigger links
Compact and precise system (mm) developed to measure fibers length on reception
Sample fibers have:
52 cm max difference between trunks
20 cm max between ribbons
10 cm max between fibers inside one ribbon
C. F. Bedoya May 22nd, 2012 22

23. Fibers
* Space available for routing the fibers is tight but existing (cable chains the major concern)
* Laying down the fibers may not need wheels opened
* Central cabling team of 4-5 people required for 3
days each wheel (estimate from Mimmo Dattola)
- Order fibers by mid June 2012
- Test and qualification by end of 2012
- Ready for installation by Beginning 2013
Plan
C. F. Bedoya May 22nd, 2012 23

24. USC racks
ROS crates
TSC crates
DT-DSS
C. F. Bedoya May 22nd, 2012 24

25. SC relocation: Installation and commissioning
Plan is to advance fibers installation and USC part (crates, fibers, etc) as much as possible (not linked to detector maintenance tasks or TRBs)
-Start installing one wheel (YB-1) late spring 2013
Intervention requires LV recabling and LVDS cables rearrangement
If commissioning is satisfactory, we can move to rest of the wheels in a staggered way, as soon as they are free from other interventions
Readjust synchronization is an important item
Work should be completed and tested by end of 2013.
Don´t expect major interferences and major concern is availability of central services.
Eventually, will need global running to check for latency adjustment and proper synchronization between subdetectors
C. F. Bedoya May 22nd, 2012 25

26. Schedule Concerns
* Major worry: Tight schedule. Efforts have been done in reducing the time requirements, still time is tight for everyone
* DT upgrade projects also have a very tight schedule with no contingency… doing our best to accomplish it
* There is one year of data taking and several Magnet cycles before LS1 (#maintenance tasks can only get worst)
* Other worries:
- Interleaving/harmonizing HO and DT-RPC interventions
Availability of crane and lifting platforms (drivers, training..)
- Availability of critical manpower (in DT) for MC repairs and testing
- Central services availability
- MC thermal cycles (central shifts?)
* SC relocation will be decoupled from TRB installation to insure proper commissioning of the new TRBs.
* This implies that the period where we need full availability of central services is long (power, cooling (aluminum and copper circuit), gas, DAQ and DCS (vme pcs, databases, PVSS, etc))
estimate from April 2013 to December 2013
* If DAQ plans are as they appear (i.e. Minidaq available in 2013) would be a great benefit.
* We are planning on vmepc and DCS PC replacement asap as LS1 start (CAEN PCI express being evaluated) (Global run afterwards?)
C. F. Bedoya May 22nd, 2012 26

27. BACK-UP
C. F. Bedoya May 22nd, 2012 27

28. INCREASED POWERING GRANULARITY TO MINIMIZE IMPACT OF FAILURES
Optimization of SC power
distribution in UX racks to
increase granularity in case of
LV supply failures requires rearranging
cables from MC
• 2 persons from central cabling
teams needed for 2 days each
rack
• Final crate cabling done by DT
personnel
INCREASED POWERING GRANULARITY TO MINIMIZE IMPACT OF FAILURES
A3100 to be converted to A3050
C. F. Bedoya May 22nd, 2012 28

29. Fibers status
-CERN´s fibers look promising according to specifications and price
(Draka. OM3, 50/125 um )
-We have ordered four 96-channels fibers and they should arrive by March 12th
-We will evaluate the length tolerance, mechanical dimensions and optical properties
-Installation and testing details will need to be discussed, since their price is very high
-From the manufacturer:
**The standard trunkcable tolerance is defined by CERN as -0/+1%. This means the minimum length of the individual MPO-connections is 60,0m and the maximum is 60,6m.
** It will however be possible for the individual MPO-connections within one trunkcable to accept a tolerance of -0/+20cm.
** Meaning, we can have a trunkcable with individual MPO-connections between 60,1 and 60,3m and another trunkcable with individual MPO-connections between of 60,4m and 60,6m. If this is OK for your customer, then this acceptable.
Multi-mode: MTP®/MPO APC Male & Female Push Pull Locking (beige)
Supplier: US Connec
C. F. Bedoya February 28th, 2012 29