1. LHC LVPS Procurement - Status
Reported by: Chris Parkman, PH-ESS
February 10, 2006
Tests by:
Bruno Allongue, Philippe Fontaine, Edgar Dos Santos (PH-ESS)
Francis Anghinolfi (PH-MIC), Mark Beharrell (IT-CO)
Georges Blanchot (PH-ATE), Alexander Singovski (CMS ECAL)
Acknowledgements to:
Federico Faccio (PH-MIC)
László Ábel, Dante Gregorio (FI-PI)

2. Technical approval Wiener Approval given with reservations
Magnetic field tolerance
EC conformity
OPC Server
Procurement underway
First release order issued
CAEN
Approval suspended
Electrical conformity
Environmental conformity
Procurement started
Accepting requests from experiments
Technical reports in preparation
10 Feb. '06 - cp
PH-ESS LVPS Procurement

3. Wiener Electrical - approved Maraton, “F8” & “F12”
CE conformity (“Maraton” will be tested by TÜV in March)
Magnetic field tolerance
1100 Gauss rather than 1200
Bimetal thermal cut-out changed – to be tested
Radiation tolerance - approved
TID & SEE (spec: 140Gy over 10 years, 2*1011 p/cm2)
October 2005 Uppsala proton tests showed no effects up to 5.03*1010 p/cm2
Probable failure of non-radiation tolerant AC/DC/PFC
December 2005 PSI proton tests showed no effects up to 2*1011 p/cm2
NIEL (spec: 1012 n/cm2 over 10 years)
January 2005 Prospero neutron tests showed no effects up to ~6*1012 n/cm2
OPC server
Qualified approval for the “Maraton”
(monitoring only over Ethernet)
Full “F12” functionality over Ethernet (sample end March)
Full functionality over Ethernet & CAN (sample two months after approval of “F12”)
10 Feb. '06 - cp
PH-ESS LVPS Procurement

4. High radiation & magnetic field tolerance
ATLAS TRT, LHCb
High radiation & magnetic field tolerance
Water cooled
10 Feb. '06 - cp μP
2. Control & monitoring
385VDC
230VAC, single phase
1. AC-DC (w. PFC)
Ethernet
3. “Maraton” 12ch 50A DC-DC (3kW) μP
OPC Server
PH-ESS LVPS Procurement
Spec A
LHCb
ATLAS-TRT

5. Low radiation & magnetic field tolerance
ALICE
Low radiation & magnetic field tolerance
Water cooled
10 Feb. '06 - cp μP
“PL500-F12” 12ch 50A DC-DC
230VAC, single phase
Ethernet
OPC Server
PH-ESS LVPS Procurement
Spec A
ALICE

6. Neutron radiation & high magnetic field tolerance
CMS ECAL
Neutron radiation & high magnetic field tolerance
10 Feb. '06 - cp
Water cooled μP
“PL500”
6ch 100A DC-DC
CMS-ECAL
230VAC, single phase
CAN
OPC Server
PH-ESS LVPS Procurement
CMS
Spec B
Radiation is present at a level below 4Gy and MeV equivalent neutrons/cm2 over 10 years, of which approximately 10% are above 20MeV.
Stray magnetic fields are present at a level up to 180mT.

7. No radiation or magnetic field tolerance
ATLAS Pixels
No radiation or magnetic field tolerance
10 Feb. '06 - cp
Air cooled μP
230VAC, single phase
“PL500-F12” 12ch 50A DC-DC ATLAS Pixels
Ethernet
OPC Server
PH-ESS LVPS Procurement
Spec A
ATLAS - Pixels

8. CAEN EASY Electrical Out of spec CE conformity
Power factor
EMC
Efficiency
Noise and ripple
CE conformity
Need approval by independent laboratory - “auto-declaration” is insufficient
Magnetic field tolerance
In spec Gauss
Radiation tolerance
Tests so far
October (PH-ESS) – TSL Uppsala - proton tests showed TID effect and SEE
December (PH-ESS) - PSI - proton tests identified particularly sensitive area on boards
January (Atlas Muons/CAEN) - Casaccia - gamma tests showed TID effect
January (Atlas Muons/CAEN) - TSL Uppsala - proton tests to refine diagnosis and test replacement components also tests of HV boards
Planned tests
February (PH-ESS) - Prospero - neutron tests end February (PH-ESS)
February or March (ATLAS Muons/CAEN) - Pavia - gamma tests on test samples for TID effects March (PH-ESS/CAEN) - PSI - tests on sample boards to verify solution to SEE
May (PH-ESS) - TSL Uppsala - final verification (repeat of October tests)
OPC server
Number of problems identified by IT-CO
Solutions promised on March time-scale
10 Feb. '06 - cp
PH-ESS LVPS Procurement

9. CAEN – Electrical issues: actions
Power factor
The tender calls for a minimum Power Factor of 0.95 (since relaxed to 0.85)
The measured value for the A3486 when delivering 3500W was 0.75
With the addition of the harmonic trap (passive filter) a Power Factor >0.9 was measured at 3500W output power and 0.7 at 1730W
CAEN will “tune” the passive filter to cover a wider range of loads, and/or put the two channels in series (two notch filters)
Mains harmonic rejection
The A3486 was found to be non-conformant to the EN Specification at all loads, however with the addition of the mains filter, the conditions of EN were met at all loads.
Use the passive filter (CAEN are not envisaging active power factor correction)
Efficiency
The specification calls for an overall efficiency (power out/power in) of better than 70% at loads from 10 to 100% of full load
The A3486 and A3009 show overall efficiencies of less than 60% at all loads. The A3486 had an efficiency of 88% at an output of 3500W, the A % at maximum possible output (the nominal output was not attainable) - thus giving an overall efficiency of some 58%.
PH-ESS showed the major losses to be apparently associated with the transformer (on the A3009).
CAEN to investigate further
Other parameters
On the A3009 measured, the voltage turn-off (fall) was not to specification (5mS) and the current limit could not be tested since it was not possible to reach the nominal output current (~8.8A instead of 9A), also the over-voltage protection did not function as specified (apparently no crow-bar)
CAEN are looking to a firmware solution
10 Feb. '06 - cp
PH-ESS LVPS Procurement

10. CAEN – Radiation tolerance: actions
Six components identified as sources of problems
Pulse width modulator - UCC3580
The UCC3580 will be replaced the non-pin compatible UC3525 (as used successfully in Casaccia and Uppsala on an ATLAS HV board)
New versions of the aux DC/DC (CAEN code: DC5) and of the drivers (CAEN code: DRIVXA and DRIVXC) in preparation
MOS driver TC4427 – transformer input driver
Replacement being proposed (LM5111 or TC4424), has apparently performed well (tests in Uppsala, Week 4)
EEPROM - control circuits
Pin compatible replacement being proposed.
6 x Schmitt-trigger inverter 74HC14 – general use
Components from Fairchild seem particularly sensitive – change to other maker
Operational amplifier LM393 used as a comparator
Remove completely – redundant monitoring function
Opto-couplers HPL0630 – SEEs inducing spurious resets to the microprocessor controller
Implement a low-pass filter on the reset line to reduce spikes, demonstrated during tests in Uppsala, Week 4
10 Feb. '06 - cp
PH-ESS LVPS Procurement

11. CAEN – OPC server Hardware persistency (§5.3)
Error states in the CAEN HW did not persist across power cycling the HW.
Voltage set point not preserved (§5.4)
Under investigation – waiting for new OPC Server release.
Fault tolerance (§5.5.2)
A specific start-up sequence results in incorrect OPC quality values for some of the items. CAEN to retest.
Data (Device) Source Access (§5.5.3)
The OPC server reads from a cache in the 1527 rather than the Easy modules.
Human readable configuration file (§5.5.4)
IT-CO to check again.
Stability & performance (§5.5.5)
Random server crashing. Work in progress
Diagnostic Facilities (§5.5.6)
Requires a new release of the OPC server.
IT-CO (Mark Beharrell) is waiting for the next OPC server release before continuing his tests. Provisional schedule – end-February.
10 Feb. '06 - cp
PH-ESS LVPS Procurement

12. EASY crate (w. crate controller)
CAEN LVPS layout μP μP
10 Feb. '06 - cp
EASY crate (w. crate controller)
12ch 9A DC-DC
OPC Server
6ch 16A DC-DC
4ch 25A DC-DC
Ethernet μP
2ch 50A DC-DC
1ch 100A DC-DC
Control & monitoring
48V Service
400VAC, 3-phase
400VAC, 3-phase
Filter
AC-DC
48VDC
PH-ESS LVPS Procurement μP
Spec A
Spec B
CMS
LHCb - VELO
ALICE - TOF
ATLAS - Muons

13. Procurement
Status
First Wiener release order being processed (~2.7MCHF)
Second release order in preparation
Requests accepted for first CAEN release order
Schedule
Wiener
Wiener will inform us of their production possibilities - next week
Faced with large orders for LVPS and crates
Any prioritisation between individual orders will be made by users with PH-ESS
Deliveries likely to be late summer…
CAEN
Long lead-time components ordered against informal notification of requirements
Despite delay in approval, ordering may proceed, but no payment before technical acceptance
Prioritisation difficult given large quantities ordered outside CERN contract
10 Feb. '06 - cp
PH-ESS LVPS Procurement

14. PH-ESS request form
Please use the PH-ESS request form whenever possible
Allows request to be tracked
For specials
Catalogue
Existing requests with status
Add items
10 Feb. '06 - cp
PH-ESS LVPS Procurement

15. Changes, Options, Parts

16. Wiener - changes
Inclusion of OPC server licence in price – no separate licence
All monolithic power supplies
Maraton control and monitoring module RCM
0R > 0R
Crate for 6 Primary Rectifier Modules
0B > 0B addition of screw terminal block at rear
10 Feb. '06 - cp
PH-ESS LVPS Procurement

17. Wiener parts in CERN Stores
Thanks to Vincent Bobillier & Georges Blanchot
Wiener parts in CERN Stores
10 Feb. '06 - cp
PH-ESS LVPS Procurement
Amphenol connector for 385VDC input to Maraton power converter

18. Suggested cables for Wiener Maraton
Cable for 385VDC Primary Rectifier to Maraton
Cable for RCM to Maraton
10 Feb. '06 - cp
PH-ESS LVPS Procurement

19. Wiener Options 1: over-voltage protection
CMS ECAL
A never-exceed output voltage achieved by the use of a non-linear transformer
ALICE
Limits the voltage at the end of the sense line (detector end) to a user defined value
This value is fixed at factory and cannot be adjusted by the user
A pure hardware limitation independent of the channel processor
10 Feb. '06 - cp
PH-ESS LVPS Procurement

20. Wiener Options 2: CERN patch-panel
Approximate cost mounted on the 0B power bin with connections to the Wiener rear-panel – 250 CHF
Customised paralleling, etc., possible - needs care (possibility of damage …)
Screens connected by clamping-bar in rack
Consider whether you would like the power bin delivered early to allow rack installations to proceed
10 Feb. '06 - cp
PH-ESS LVPS Procurement
Right-angled lugs available from the CERN Stores
More on lugs

21. Right-angled lugs
10 Feb. '06 - cp
PH-ESS LVPS Procurement

22. CAEN Options: Anderson Connectors v. Screw Terminals
10 Feb. '06 - cp
PH-ESS LVPS Procurement
A channels
A channels
Screw terminals preferred

23. Electrical & Environmental Tests

24. Wiener Electrical tests

25. Wiener PL500 “F12” electrical tests - overview
Static regulation:
Spec: 0.5%
Test: 0.026%.
Dynamic regulation:
Spec: 10% of set voltage
Test: 1%
Efficiency:
Spec: >70%
Test: 72%
Power factor
Spec: ≥0.95
Test: 0.975
Noise and ripple:
Spec: < 10mV at output terminals
Test: ~30mv p/p at 200MHz
Test: ~13mv p/p at 20MHz
Turn ON time:
Spec: >50ms, <100ms
Test: 80ms.
Turn OFF time:
Spec: <5ms
Test: 90ms
EMC
EN compliant
10 Feb. '06 - cp
PH-ESS LVPS Procurement
230VAC, single phase
OPC Server
“PL500-F12” 12ch 50A DC-DC ATLAS Pixels
0M Monolithic 3U 19" power box, 230V 50Hz PFC input, 12 channel DC output, 2-8V, 90W nominal, 11.5A max, 10A continuous, Ethernet control. OPC server licence.
Ethernet
In discussion with Wiener

26. Wiener Maraton electrical tests - overview
Static regulation:
Spec: 0.5%
Test: 0.034%.
Dynamic regulation:
Spec: 10% of set voltage
Test: 8%.
Efficiency:
Spec: >70%
Test: 75.2%
Power factor
Spec: ≥0.95
Test: (full load)
Test: (one channel, full load)
Noise and ripple:
Spec: < 10mV at output terminals
Test: 15mv p/p at 200MHz - 8mv p/p at 20MHz
Turn ON time:
Spec: >50ms, <100ms
Test: 75ms.
Turn OFF time:
Spec: <5ms
Test: 2.5ms.
Current limit protection:
Spec: 110% of rated current
Test: 55.4A adjustable
Over voltage protection:
Spec: 125% of set voltage
Test: 6.2V
EMC
EN compliant
10 Feb. '06 - cp
PH-ESS LVPS Procurement
230VAC, single phase
1. AC-DC (w. PFC)
385VDC
3. “Maraton” 12ch 50A DC-DC (3kW)
2. Control & monitoring
0M U 19" power box, 385VDC input, 12 channel DC output, 2-8V, 300W nominal, 55A max, 50A continuous, analogue controlled interface. Water cooled, no magnetic screening.
Ethernet

27. Wiener radiation tests

28. Wiener Maraton – Uppsala October 2005
Probable cause – irradiation of the AC/DC/PFC module (non-radiation tolerant)
Wiener Maraton – Uppsala October 2005
Spec. 2*1011 p/cm2
10 Feb. '06 - cp
PH-ESS LVPS Procurement
p/cm2

29. Wiener Maraton – PSI December 2005
Spec. 2*1011 p/cm2
10 Feb. '06 - cp
PH-ESS LVPS Procurement
p/cm2

30. CAEN Electrical

31. CAEN A3486/A3009/A3025 electrical tests - overview
EMC (conditions: loaded to 1728W - 36A, 48V)
Non compliant with h5, h7, h11, h13, h17, h19
Power Factor 0.74 (spec. ≥0.95)
The system exhibited non negligible level of common mode noise
The environment was not optimum (no LISN, no ground plane).
Static regulation
Spec: 0.5%
Test: < 0.5% of set voltage
Dynamic regulation:
Spec: 10% of set voltage
Test: <10% of set voltage
Efficiency
Spec: >70%, % load
Test: overall system 57% + loss in DC cable.
AC/DC converter (A3486): 88%.
DC/DC converter (A3009, A3025…): 65%.
Noise and ripple:
Need additional measurements (30m of cable with loads capacitance of 300uF)
Turn on
OK.
Turn off
> 5ms.
Current limit protection:
<110% of rated maximum current. Impossible to reach the nominal value.
Overvoltage protection:
In case of overvoltage , error message “OVV” on SY2527 screen but no drop of output voltage.
No crowbar
10 Feb. '06 - cp
PH-ESS LVPS Procurement

32. CAEN Radiation Tests

33. CAEN A3009 - Uppsala October 2005
p/cm2
10 Feb. '06 - cp
PH-ESS LVPS Procurement

34. CAEN A3009 - Uppsala October 2005
10 Feb. '06 - cp
PH-ESS LVPS Procurement

35. CAEN A3009 - Uppsala October 2005
10 Feb. '06 - cp
PH-ESS LVPS Procurement

36. CAEN A3009 - Uppsala October 2005
10 Feb. '06 - cp
PH-ESS LVPS Procurement

37. CAEN A3025 - Uppsala October 2005
p/cm2
10 Feb. '06 - cp
PH-ESS LVPS Procurement

38. CAEN A3025 - Uppsala October 2005
10 Feb. '06 - cp
PH-ESS LVPS Procurement

39. CAEN A3486 - Uppsala October 2005
10 Feb. '06 - cp
PH-ESS LVPS Procurement
p/cm2
Restart beam
p/cm2

40. CAEN A3009 - PSI December 2005 A B C D E
Power solid state fuse + microprocessor
10 Feb. '06 - cp A B C D
PH-ESS LVPS Procurement E
Input diode
Switching transistor ?
Service solid state fuse + EEPROM

41. PSI December 2005 CAEN A3009 - Area A: Ch. 2 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

42. PSI December 2005 CAEN A3009 - Area A: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

43. PSI December 2005 CAEN A3009 - Area A: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

44. PSI December 2005 CAEN A3009 - Area D: communication
10 Feb. '06 - cp
PH-ESS LVPS Procurement

45. PSI December 2005 CAEN A3009 - Area E: communication
10 Feb. '06 - cp
PH-ESS LVPS Procurement

46. PSI December 2005 CAEN A3050 - Area A: Ch. 1 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

47. PSI December 2005 CAEN A3050 - Area A: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

48. PSI December 2005 CAEN A3050 - Area A: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

49. PSI December 2005 CAEN A3050 - Area B: Ch. 1 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

50. PSI December 2005 CAEN A3050 - Area B: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

51. PSI December 2005 CAEN A3050 - Area B: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

52. PSI December 2005 CAEN A3050 - Area C: Ch. 1 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

53. PSI December 2005 CAEN A3050 - Area C: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

54. PSI December 2005 CAEN A3050 - Area C: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

55. PSI December 2005 CAEN A3050 - Area D: Ch.1 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

56. PSI December 2005 CAEN A3050 - Area D: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

57. PSI December 2005 CAEN A3050 - Area D: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

58. PSI December 2005 CAEN A3050 - Area E: Ch.1 Vout
10 Feb. '06 - cp
PH-ESS LVPS Procurement

59. PSI December 2005 CAEN A3050 - Area E: input power current
10 Feb. '06 - cp
PH-ESS LVPS Procurement

60. PSI December 2005 CAEN A3050 - Area E: input service current
10 Feb. '06 - cp
PH-ESS LVPS Procurement