Radiation tolerance and magnetic field behavior of CAEN HV and LV boards for LHC experiments

Como, 15-19 Oct 2001

7th Conf. on Advanced Technology and Particle Physics

Radiation tolerance and magnetic field behavior of

CAEN HV and LV boards for LHC experiments

UNI EN ISO 9001 CERT. N. 9105.CAEN

COSTRUZIONI APPARECCHIATURE ELETTRONICHE NUCLEARI Via Vetraia, 11 - I 55049 VIAREGGIO (Italy)Phone: +39.0584.388398 Fax: +39.0584.388959 URL: http://www.caen.it

Giuseppe VitaleGiuseppe Vitale

Como, 15-19 Oct 2001


Talk summaryTalk summary

SY1527 system overview SY1527 system overview

CMS Muon Chambers suppliesCMS Muon Chambers supplies

(radiation tests)(radiation tests)

DC-DC converter DC-DC converter

(radiation and magnetic field tests)(radiation and magnetic field tests)

ConclusionsConclusions

Como, 15-19 Oct 2001


CAEN and COTS CAEN and COTS radiation testsradiation tests

First COTS rad-tolerance tests in ENEA-First COTS rad-tolerance tests in ENEA-Casaccia in ‘98 for CMS ECALCasaccia in ‘98 for CMS ECAL(collaboration with E. Longo, (collaboration with E. Longo, INFN- Roma1)INFN- Roma1)

Tests with p and n in Louvain-la-Neuve, Tests with p and n in Louvain-la-Neuve, CRC in ‘99-’01 for CMS Muon Chambers CRC in ‘99-’01 for CMS Muon Chambers (collaboration with M. De Giorgi, (collaboration with M. De Giorgi, INFN- Padova/5% funding program)INFN- Padova/5% funding program)

Como, 15-19 Oct 2001


CMS Muon Drift CMS Muon Drift TubesTubes

overviewoverview ~200,000 Drift Tubes~200,000 Drift Tubes 2x(+4 kV), +2 kV and -2 kV supplies 2x(+4 kV), +2 kV and -2 kV supplies

required for each tuberequired for each tube Floating supplies for on-detector Floating supplies for on-detector

groundinggrounding Remote systemsRemote systems ~ kGauss magnetic ~ kGauss magnetic

field, ~10field, ~101111n/cmn/cm22, , <1 kRad in 10 y <1 kRad in 10 y

Como, 15-19 Oct 2001


System for CMS System for CMS Drift TubesDrift Tubes

FLOATING HVFLOATING LV

FLOATING GND 0


FLOATING GND 3


FLOATING GND 2


FLOATING GND 1........

Como, 15-19 Oct 2001


CMS CMS drift drift tubes tubes

Master BoardMaster Board

4 primary ch. + 4 primary ch. + communicationcommunication

Provides also Provides also low voltages forlow voltages forremote boardsremote boards

60 boards, 60 boards, 8 mainframes8 mainframesfor the whole for the whole systemsystem

Como, 15-19 Oct 2001


CMS CMS drift tubes drift tubes

Remote BoardRemote Board 12 complex ch. + comm. link12 complex ch. + comm. link Allows V and I monitor on each outputAllows V and I monitor on each output 240 boards240 boards p and n irradiation tests @ CRCp and n irradiation tests @ CRC

Como, 15-19 Oct 2001


Remote BoardRemote Boardirradiation tests Iirradiation tests I

First tests in ‘99 with neutron beam First tests in ‘99 with neutron beam up to 60 MeV, 2*10up to 60 MeV, 2*101111 n/cm n/cm2 2 (CRC)(CRC)

components failurecomponents failure

Board redesigned:Board redesigned:

Tests in ‘00-’01 with 60 MeV Tests in ‘00-’01 with 60 MeV protons up to 7 kRad, protons up to 7 kRad, 2*102*101010 p/cm p/cm22 (CRC) successfully passed(CRC) successfully passed

Como, 15-19 Oct 2001


Remote BoardRemote Boardirradiation tests IIirradiation tests II

Complete beam scanning over the Complete beam scanning over the whole board area whole board area

9x6 cm9x6 cm22 collimator used, 7 kRad collimator used, 7 kRad dose, dose, 2*102*101010 p/cm p/cm22

Como, 15-19 Oct 2001


Remote BoardRemote Boardirradiation tests IIIirradiation tests III

V-I monitoring during V-I monitoring during irradiationirradiation

Como, 15-19 Oct 2001


CAEN LV solution for CAEN LV solution for LHC experimentsLHC experiments

A 4V 36A DC-DC Converter has A 4V 36A DC-DC Converter has been developed for LHC been developed for LHC applicationsapplications

First prototype successfully First prototype successfully passed all radiation and passed all radiation and magnetic field tolerance testsmagnetic field tolerance tests

Como, 15-19 Oct 2001


Rad tolerance Rad tolerance testtest

Test in 2001 with 60 MeV protons Test in 2001 with 60 MeV protons up to 7 kRad, 2*10up to 7 kRad, 2*101010 p/cm p/cm2 2 (CRC)(CRC)

Como, 15-19 Oct 2001


Magnetic field Magnetic field test test setupsetup

Magnet: MNP24-1 at CERN Magnet: MNP24-1 at CERN Bldg. 168Bldg. 168

B: up to 10 kGaussB: up to 10 kGauss

Electronic load: Electronic load: Powertronic Powertronic Mod. 2-9721 80 V 50 AMod. 2-9721 80 V 50 A

Power supply Delta Power supply Delta Elektronika SM7020 70 V 20 AElektronika SM7020 70 V 20 A

Oscilloscope Tektronix 3032Oscilloscope Tektronix 3032

Como, 15-19 Oct 2001


DC-DC converterDC-DC convertersimplified modelsimplified model

20 m ohm

20 m ohm

14 m ohm

14 m ohm

V Load

Vset

S+

S-

I Load

I In

V In

Como, 15-19 Oct 2001


Results (I)Results (I)

B (KG) I Load (A) tf (ns) tr (ns) V in V Load I In (A) P Loss (W) Conv Effic Tot Effic

0 15 30 40 48 4 1,90 6,44 0,73 0,661 15 30 40 48 4 1,9 6,44 0,73 0,662 15 30 30 48 4 1,9 6,44 0,73 0,663 15 20 30 48 4 1,9 6,44 0,73 0,664 15 20 30 48 4 1,9 6,44 0,73 0,665 15 20 30 48 4 1,9 6,44 0,73 0,668 15 20 30 48 4 1,95 6,45 0,71 0,64

B

B field B field to toroid plane to toroid plane

Low power (I load: 15 A)Low power (I load: 15 A)

B up to 8 kGB up to 8 kG

No significant efficiency loss (as expected)No significant efficiency loss (as expected)

Como, 15-19 Oct 2001


Results (II)Results (II)

B (KG) I Load (A) tf (ns) tr (ns) V in V Load I In (A) P Loss (W) Conv Effic Tot Effic 1 15 20 30 48 4 1,9 6,44 0,73 0,662 15 20 30 48 4 1,9 6,44 0,73 0,663 15 20 30 48 4 1,9 6,44 0,73 0,664 15 10 30 48 4 1,95 6,45 0,71 0,645 15 10 30 48 4 1,98 6,46 0,70 0,636 15 10 30 48 4 2 6,46 0,69 0,637 15 10 30 48 4 2,01 6,46 0,69 0,628 15 10 30 48 4 2,01 6,46 0,69 0,62

Worst case

B

B field B field //// to toroid plane to toroid plane

Low power (I load: 15 A)Low power (I load: 15 A)


Efficiency loss due to B : 5%Efficiency loss due to B : 5%

Como, 15-19 Oct 2001


Results (III)Results (III)

B (KG) I Load (A) tf (ns) tr (ns) V in V Load I In (A) P Loss (W) Conv Effic Tot Effic

5 36 10 30 48 4 5,7 37,59 0,66 0,5310 36 10 30 48 4 6 37,73 0,63 0,50

Worst case

B

B field B field //// to toroid plane to toroid plane

High power (I load: up to 36 A)High power (I load: up to 36 A)


Efficiency loss due to B : 11%Efficiency loss due to B : 11%

Como, 15-19 Oct 2001


DC-DC Converter DC-DC Converter control philosophycontrol philosophy

SY

1527

SY

ST

EM

MA

INF

RA

ME

CO

NT

RO

LLO

GIC

V+

V-

S+S-

V+

V-

S+S-

V+

V-

S+S-

DC-DC

DC-DC

DC-DC

48 V

CO

NT

RO

LLO

GIC

V+

V-

S+S-

V+

V-

S+S-

V+

V-

S+S-

DC-DC

DC-DC

DC-DC

48 V

HOSTILE AREA

48 VBACK UPBATTERY

POWER FAILUREINTERRUPT

48 V HIGHPOWERSOURCE

Como, 15-19 Oct 2001


AcknowledgementsAcknowledgements

We wish to thank all the following people:We wish to thank all the following people: Radiation tests:Radiation tests:

– E. Longo (INFN Roma 1)E. Longo (INFN Roma 1)

– M. De Giorgi (INFN PD)M. De Giorgi (INFN PD)

Magnetic field tests:Magnetic field tests:

– S. De Pasquale, F. Cindolo, A. Marin (ALICE)S. De Pasquale, F. Cindolo, A. Marin (ALICE)

– A. Fucci, L. Periale (CERN ESS-EP)A. Fucci, L. Periale (CERN ESS-EP)

Como, 15-19 Oct 2001


ConclusionsConclusions CMS Muon HV Rad tests up to 7 kRad, 2*10CMS Muon HV Rad tests up to 7 kRad, 2*101010 p/cm p/cm22 passed passed

LV Rad tests up to 7 kRad , 2*10LV Rad tests up to 7 kRad , 2*101010 p/cm p/cm22 passed passed

LV Magnetic field tests up to 10 kG passedLV Magnetic field tests up to 10 kG passed

HV/LV channels can be controlled via SY1527 mainframeHV/LV channels can be controlled via SY1527 mainframe

SY1527 can be easily integrated within DCS via OPC SY1527 can be easily integrated within DCS via OPC

controlcontrol

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Radiation tolerance and magnetic field behavior of CAEN HV and LV boards for LHC experiments

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