The Electronics Readout of The Electronics Readout of the W/Quartz-fibre the W/Quartz-fibre Calorimeter for theCalorimeter for the

Luminosity Measurement in Luminosity Measurement in H1H1..

The Electronics Readout of The Electronics Readout of the W/Quartz-fibre the W/Quartz-fibre Calorimeter for theCalorimeter for the

Luminosity Measurement in Luminosity Measurement in H1H1..V.V. BoudryBoudry

LLR, LLR, ÉÉcole Polytechnique,cole Polytechnique,

on behalf of the H1 Luminosity Groupon behalf of the H1 Luminosity Group

The H1 luminosity system

I.P.e

PD

filter

synch. rad.

pET

104 m

Bremsstrahlung

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

More & harder radiationMore & harder radiation(E(E sync. radiation sync. radiation 1 1 MeV)MeV)electronics outside tunnelelectronics outside tunnel

Higher rates:Higher rates:@ nom.@ nom.

0.6 0.6 /Crossing E/Crossing E>5.0GeV>5.0GeV 1.7 1.7 /Crossing E/Crossing E>0.5GeV>0.5GeV

Pile-UpPile-Up Poissionian StatisticsPoissionian Statistics

Implications Implications ofof HERA II HERA II

HERA IIHERA II Ie = ~3mAIe = ~3mA Ip = ~15mAIp = ~15mA 220 bunches220 bunches 186 colliding186 colliding ×× 5 5 Stronger Stronger

focusingfocusing Stronger Stronger

bendingbending ee±± polarisation polarisation

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Photon DetectorPhoton Detector W/Quartz fibre calorimeter Presented by A.E. Specka @ Calor2000

2 × 12 channels Insensitivity to

low E (<MeV) Very High

rad. hardness

BUT 130 p.e. / GeV PM gain kept low

(High rates) ~130m of cables

Specific solution needed

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Analogical PartAnalogical Part

O.C. = Optical CalibrationE.C. = Electronic Calib.

O.C. E.C.

Pre-Amp

Pre-Amp

Coaxial cable RG58L = 125m

Shaper

Pre-AmplifierLAL, Orsay

• 15 channels

• 14• 1 reference ch. (“Fake”)

• Calibration 4 by 4• Gain 10 on 50 Ω

• I/O back to back

• 10 × 15 cm²

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Analogical PartAnalogical Part

O.C. = Optical CalibrationE.C. = Electronic Calib.

O.C. E.C.

Pre-Amp

Pre-Amp

Coaxial cable RG58L = 125m

Shaper

Shaper BoardLAL, Orsay

• 15 channels• 1 common ref. channel, subtracted after shaping

• Full Cable compensation (Unity global gain) by 2 PZC• Fast Shaping

• 0-2V differential output to ADC• Extra output for Sums

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Analogical PartAnalogical Part

O.C. = Optical CalibrationE.C. = Electronic Calib.

O.C. E.C.

Pre-Amp

Pre-Amp

Coaxial cable RG58l = 125m

Shaper

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Performances of Analogical Performances of Analogical PartPart

collected (150Hz) noise: 80 to 8mVcollected (150Hz) noise: 80 to 8mV reduction by 10 reduction by 10 minimumminimum

White (intrinsic) noise:White (intrinsic) noise: SS ing. ch.ing. ch. SumsSums

0.55 mV0.55 mV 0.96 mV0.96 mV Low on Pre-AmpLow on Pre-Amp Dominated by Dominated by ShaperShaper

Linearities better than 1%Linearities better than 1% Fully operational since the summerFully operational since the summer

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

H1 Lumi

VME Bus

AD 9042

(24ns, 12bits)

Pipelines

(x8)

H1 Lumi

HistogramsPowerPC300 MHz

(Mezzanine card)

20 MHz, 24 data bits Data

Trig.

Trig. HCkPEn

ADC

Pipelines

Custom

TDC

(0.5ns, 20µs)- Delays- H1 signals- Spying- Patterns

- HCk x 1,2,4

ServiceModule

H1 CDAQ(150Hz)

H1 CDAQ(150Hz)

FPGA

MFCC

~1Hz

Lynx VME StationCES RIO2 (300MHz PowerPC)

AnalysisAnalysis

MonitoringMonitoring

ControlSlow

ControlSlow

Energies Sums

ADC Board• 8 channels• 0-2V differential input• ADC AD 9042 (12 bits each 24ns)• 2 independent Pipelines of 256 x BC (4 samples per BC)• Readout by VME & “Lumi Bus”• Digital thresholds on 2 ch.• Simultaneous Writing & Reading possible on Lumi part

AcquisitionAcquisition

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

H1 Lumi

VME Bus

AD 9042

(24ns, 12bits)

Pipelines

(x8)

H1 Lumi

HistogramsPowerPC300 MHz

(Mezzanine card)

20 MHz, 24 data bits Data

Trig.

Trig. HCkPEn

ADC

Pipelines

Custom

TDC

(0.5ns, 20µs)- Delays- H1 signals- Spying- Patterns

- HCk x 1,2,4

ServiceModule

H1 CDAQ(150Hz)

H1 CDAQ(150Hz)

FPGA

MFCC

~1Hz

Lynx VME StationCES RIO2 (300MHz PowerPC)

AnalysisAnalysis

MonitoringMonitoring

ControlSlow

ControlSlow

Energies SumsAcquisitionAcquisition

H1 Lumi

VME Bus

AD 9042

(24ns, 12bits)

Pipelines

(x8)

H1 Lumi

HistogramsPowerPC300 MHz

(Mezzanine card)

20 MHz, 24 data bits Data

Trig.

Trig. HCkPEn

ADC

Pipelines

Custom

TDC

(0.5ns, 20µs)- Delays- H1 signals- Spying- Patterns

- HCk x 1,2,4

ServiceModule

H1 CDAQ(150Hz)

H1 CDAQ(150Hz)

FPGA

MFCC

~1Hz

Lynx VME StationCES RIO2 (300MHz PowerPC)

AnalysisAnalysis

MonitoringMonitoring

ControlSlow

ControlSlow

Energies Sums

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

Mask

Trigger Logic

Bunch Counter

FIFO

256×

32 bits

TableSequence

Sequencing& formating

Lu

mi B

us

(20

MH

z)

Po

wer

PC

bu

s 66

MH

z

Fro

nt

Fac

e

T.B.

Trig.Bits

PipelineEnable

Data

Add.

Data Data

Bunch 0

Bunch #Trigger

FPGAAltera 10K50Mask

Trigger Logic

Bunch Counter

FIFO

256×

32 bits

TableSequence

Lu

mi B

us

(20

MH

z)

Po

wer

PC

bu

s 66

MH

z

Fro

nt

Fac

e

T.B.

Trig.Bits

PipelineEnable

Data

Add.

Data Data

Bunch n

Bunch #Trigger

FPGAAltera 10K50

Sequencing& formatting

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

2 acquisition modes fully managed by the FPGA:2 acquisition modes fully managed by the FPGA: Triggered (Calibration, Efficiencies, Control)Triggered (Calibration, Efficiencies, Control) Train (High statistics on Sums):Train (High statistics on Sums):

~50 continuous BC read in 1 row ~50 continuous BC read in 1 row No screening effectNo screening effect

Triggering and bunch tagging information availabilityTriggering and bunch tagging information availability Flexible sequencing (programmable LUT) in FPGAFlexible sequencing (programmable LUT) in FPGA Powerful & flexible treatment on MFCC by a Powerful & flexible treatment on MFCC by a

dedicated PPCdedicated PPC Actual Performances: Actual Performances:

~1.6µs/BC~1.6µs/BC Entirely due to CPU limitation (192 ns from bus, 460 from Entirely due to CPU limitation (192 ns from bus, 460 from

sequencing)sequencing) Could be improved by:Could be improved by: - software optimisation - software optimisation

- New MFCC with L2 cache - New MFCC with L2 cache Being commissioned ( restarts this week)Being commissioned ( restarts this week)

AcquisitionAcquisition

Calor 2002 - 28/03/02H1 Lumi ElectronicsV. Boudry

ConclusionsConclusions A fast & low noise analogical electronics has been A fast & low noise analogical electronics has been

realized for the H1 luminosity remote detectors and is realized for the H1 luminosity remote detectors and is workingworking

A complete, flexible, MHz range acquisition setup was A complete, flexible, MHz range acquisition setup was built and is being commissioned for the H1 Luminosity built and is being commissioned for the H1 Luminosity systemsystem

Base: Commercial mezzanine cardBase: Commercial mezzanine card FPGA performing all the acquisition: triggering, sequencing, FPGA performing all the acquisition: triggering, sequencing,

reading, formatting and bufferingreading, formatting and buffering

Dedicated PowerPC treats the data & provides histogramsDedicated PowerPC treats the data & provides histograms

Same electronics & DAQ to be used for the longitudinal Same electronics & DAQ to be used for the longitudinal & transverse polarimeters of HERA& transverse polarimeters of HERA 2 & 4 channels2 & 4 channels

Continuous readout to be attemptedContinuous readout to be attempted