1. MICROFIP-Do we need further tests? 28th June 2011
G. Spiezia (EN/STI)
05/05/2019

2. Outline Summary of the existing chips How Microfip is used in LHC
Past radiation tests –brief summary
List of confirmed failures
Can one give a cross section per equipment?
Discussion
05/05/2019

3. Existing Chip - Summary
Manufacturer/Version
Technology
1) VLSI Technology 9838 N ) Philips 0246 Y42350Y1
0.6 µm
1) ON Semiconductor 0907LNP
2) AMI Semiconductor 0839LXT
0.5 µm
(Thanks Reiner, Julien)
0.6 mm
0.6 mm
05/05/2019

4. Existing Chip - Summary
Manufacturer/Version
Technology
VLSI Technology 9838 N / Philips 0246 Y42350Y1
0.6 µm
ON Semiconductor 0907LNP /
AMI Semiconductor 0839LXT
0.5 µm
0.5 mm
05/05/2019

5. How MicroFip is used in LHC
Stand Alone
the main configuration is set by switch and then is stored in an internal register  (power cycle to change configuration)
2 ports for data exchange
Micro-controlled:
The main configuration can be set by the microcontroller (Is a power cycle needed?)
Memory for data exchange
05/05/2019

6. How MicroFip is used in LHC
Users
RADMON: stand-alone
Survey: Stand alone and Micro-controlled (FIPADUC)
QPS: Micro-controlled (FIPADUC)
Cryogenics: Micro-controlled (FPGA)
Power Converter: Micro-controlled (?)
BPM: Micro-controlled (FPGA antifuse)
Different use, different microcontroller, different bus speed (31.25 kb/s, 1 Mb/s, 2.5 Mb/s)
05/05/2019

7. Radiation tests Test on the microfip for the LHC cryogenic 2002
Micro-controlled mode – chip 0.6 mm
PSI-60 MeV
Main results: current increase with TID and s=1e-8 err/cm2
No latch-up
1 SEU on the configuration register required a power cycle
J. Casas-Cubillos et All, “SEU tests performed on the digital communication system
for LHC cryogenic instrumentation”
05/05/2019

8. Radiation tests Test on the microfip for the LHC cryogenic
2002
Micro-controlled mode – chip 0.6 mm
PSI-60 MeV
Main results: current increase with TID and s=1e-8 err/cm2
No latch-up
1 SEU on the configuration register required a power cycle
J. Casas-Cubillos et All, “SEU tests performed on the digital communication system
for LHC cryogenic instrumentation”
?? From the plot, s=1e-10 err/cm2 ??
05/05/2019

9. Radiation tests Test on the microfip for the LHC cryogenic 2006
Stand alone mode – chip 0.6 and 0.5 mm
Co-60, PSI-60 MeV, 1 MeV eq.
Main results:
current increase with TID (more severe with Co-60) and with 1 MeV eq. (test up to 5e12 n/cm2)
MicroFIp 0.5 mm shows functional interrupts recovered by power cycle
T. Wijnands, c. Pignard “Radiation tolerance of the WorldFIP field bus interface”’
LHC project note 385
05/05/2019

10. Radiation tests Test on the microfip for the LHC cryogenic 2006
Stand alone mode – chip 0.6 and 0.5 mm
Co-60, PSI-60 MeV, 1 MeV eq.
Main results:
current increase with TID (more severe with Co-60) and with 1 MeV eq. (test up to 5e12 n/cm2)
MicroFIp 0.5 mm shows functional interrupts recovered by power cycle (statistics on the number of errors is not reported)
T. Wijnands, c. Pignard “Radiation tolerance of the WorldFIP field bus interface”’
LHC project note 385
05/05/2019

11. Radiation tests
CNRAD: test of entire boards (The list might not be complete)
QPS
Cryogenics (Report on the RADWG website)
BPM
Main results: “The cross section of the tested boards is low enough to be used in the LHC tunnel and in the shielded areas”
05/05/2019

12. List of Failures so far ...
Cryogenics Control and readout on WORLDFIP – 1Confirmed (0.6 mm chip)
Location: Injection line TI2 (cell8L2-caused by a beam loss)
Type of failure: Block of the FIP communication
QPS:– 1Confirmed (0.6 mm chip) + other doubtful
Location: Arc
05/05/2019

13. Main Question – R2E project
Given that
NanoFIP will be tested at the end of the year
Only QPS has started a prototype board to use the NanoFIP
Coexistence of MicroFIP and NanoFip is not excluded
Can one give the rate of the failures due to the microfip per equipment?
Is it low enough to avoid frequent interrupts for the tunnel equipment when LHC will run with 25 ns bunch spacing?
Ideally tests are needed to figure out the cross section for SEFI of the MicroFIP
Test must be representative of the use in real conditions
Stand alone- micro controlled
New (0.5 mm) Old (0.6 mm) chip
Discriminate the influence of the microcontroller
05/05/2019

14. Discussion What is needed: What are your points??? QPS: Cryogenics:
Use of Spare cards – if available
FIPDIAG card (J. Palluel) could be used BUT it is quite busy to isolate the parts under beam
Software for remote control
Common Effort
What are your points???
QPS:
Cryogenics:
Power Converter:
05/05/2019