fieldbus : worldfip radhard developments
DESCRIPTION
FIELDBUS : WorldFIP RadHard Developments. Julien Palluel BE/CO/FE. Summary. WorldFIP Description and principle LHC problematic RadHard Solutions Protection systems Re-initialisation systems Choice of components Radiation tests : repeater Co/Co example Gammas radiations Protons tests. - PowerPoint PPT PresentationTRANSCRIPT
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Julien PALLUEL BE/CO/FE Radiation To Electronics ‘1st Combined Workshop & School-Days’ June 2nd/ 3rd 2009 1
Julien Palluel BE/CO/FE
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Julien PALLUEL BE/CO/FE Radiation To Electronics ‘1st Combined Workshop & School-Days’ June 2nd/ 3rd 2009 2
WorldFIP Description and principleLHC problematic
RadHard SolutionsProtection systemsRe-initialisation systemsChoice of components
Radiation tests : repeater Co/Co exampleGammas radiationsProtons tests
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Julien PALLUEL BE/CO/FE Radiation To Electronics ‘1st Combined Workshop & School-Days’ June 2nd/ 3rd 2009 3
DescriptionMaximum length of wiring
○ 8000m with a speed of 31.25Kb/s○ 1000m with a speed of 1Mb/s○ 500m with a speed of 2.5Mb/s
300 km of WorldFIP fieldbus
Consequences Repeaters RadHardDiagnostic Agent Rad-Hard (FIPDiag)
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Julien PALLUEL BE/CO/FE Radiation To Electronics ‘1st Combined Workshop & School-Days’ June 2nd/ 3rd 2009 4
LHC problematicAll elements must be RadHard
○ Protection against latch-up○ Protection against single event○ Lifetime under radiation : >200 Gy
Components high life○ Durability of the radiation tested cards
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Protection against latch-upPowercycle System
Example : Repeater RadHard Protection system : cut the power line with a MOS
power for 1 second after the detection of an
overcurrent (ex threshold 4xInom)
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Principle of protection against latch-up:
Schema of protection against latch-up:
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Protection against latch-up Component reference
○ Cut-off element : MOS-FET OD 22-16V ○ Current measure : LMV 393 ○ Cut-off timer : CMOS 74HC4538
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Protection against Single Event module Re-initialisation
Example : Repeater RadHard
Protection system : inactivity of one of the two mediums, detected by the component FIELDRIVE generates a reset signal which is processed by an integrated function in the FPGA.
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Protection against Single Event Up-set:Corruption of memory (address, configuration…)
Example : FIPDiag module
re-initialisation of the software by a remote reset triggered by a specific message (255 characters)
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Lifetime under radiation selection of components not sensitive to
radiation …)
Example : Galvanic isolation provided by the
transformer in place of optocoupler Repeater RadHard A 5V supply is obtained from 230V sector.
The regulation is linear (type regulator Balasta) with transformer and diode bridge.
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Principle of power supply:
Schema of power supply :
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Lifetime under radiation selection of components not sensitive to radiationExample : Repeater RadHard
Repetition process embedded in a type ACTEL FPGA anti-Fuse resistant to radiation (Ref : Actel eX128 TQ100)
CMOS components
WorldFIP technology tested in 1998 (FIELDRIVE)
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Lifetime under radiationRepeater RadHard WorldFIP technology tested
in 1998 (TCC2, mixed fields) Référence composant :
○ SSSB222 FIELDRIVE 0421A○ FIELDTRx.S JMF 9539 04/47
Currently these two components have evolved to a new technology that seems to be more sensitive to radiation.
Tests are planned at CNGS
!
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Components turnover Period of production too shortSolution Use virtual device defined in VHDL and
integrated in FPGA already testedExample : In-sourcing WorldFIP technology
○ Purchase technology WorldFIP VHDL ○ Adaptation to CERN needs○ Realisation
Project under the responsibility of Javier Serrano’s team
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General architecture of the card :
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Gammas radiations tests at Pagure’s CEA, Saclay
Conditions of irradiation○ Cobalt-60 source○ Total Irradiation of the card (active part)○ Dose and period:
1h30 at 20Gy/h (2.60m from the source)5h at 60Gy/h (1.51m from the source)
○ FIP Speed : 1MB/s.○ MacroCycle period : 100ms○ Variables : 2 (1xRead + 1xWrite on FIPDIAG)
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Gammas radiations tests at Pagure’s CEA, SaclayResults :
○ 1) 20Gy/h irradiationNo functionnal fault (Up-set, Latch-up and Reset) The overall current of the module remained constant at 147mA Test of the anti-latch-up was working well
○ 2) 60Gy/h irradiationNo functionnal fault (Up-set, Latch-up and Reset) until 310Gy up where the module has stopped working.
Remarks :○ The overall current of the module has increased from 147mA to 152mA, then
147mA just before stop working. ○ We have made some power reset until the end of this test. The repeater
stayed silent ○ Once testing is completed, after 5 minutes of rest, the module was working
normally. Possible reason : the supply current has drained the trapped charges in MOS thresholds and allowed them to re-operate properly.In the LHC where the modules will experience a much lower fluence, it should therefore not have any operational defect related to gamma radiation.
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Protons tests at Louvain,Belgium
Conditions of irradiation○ Proton beam 62 Mev○ Flux between 5x10exp7 and 5x10exp8 P/cm2/s○ Total Irradiation of the card (active part)○ Speed : 2.5MB/s○ MacroCycle period : 20ms○ Variables : 2 (1xRead + 1xWrite on FIPDIAG)
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Protons tests at Louvain,BelgiumResults
○ 235gy (1 Up-Set seen) on first repeater○ 512gy (2 Up-Sets seen) on second repeater
before first faults○ Overall current mainly constant○ Test of the anti-latch-up was working well
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Main repository www.cern.ch/cern-worldfip
Repeater Rad Hardwww.cern.ch/cern-worldfip/Docs/CERN
Presentations/Radiation Hard Repeater-ENG.pdfhttp://documents.cern.ch//archive/electronic/cern/others/ab/ab-
note-2005-039.pdfwww.cern.ch/cern-worldfip/Docs/Hardware Modules/Repeater
CU-CU Radiation Hard/Manuel Repeteur Cu_Cu-FR.pdf
FIPDiagwww.cern.ch/cern-worldfip/Docs/CERN Presentations/Fipdiag
and FipADUC Modules-ENG.pdf
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Radiation Répéteur FPGA Proton Gamma WorldFIP Latch-up Upset Dose