The Electronics Readout of The Electronics Readout of the W/Quartz-fibre the W/Quartz-fibre Calorimeter for the Calorimeter for the Luminosity Measurement in Luminosity Measurement in H1 H1 . . V. V. Boudry Boudry LLR, LLR, É É cole Polytechnique, cole Polytechnique, on behalf of the H1 Luminosity Group on behalf of the H1 Luminosity Group The H1 luminosity system I.P. e PD filter synch. rad. p ET 104 m Bremsstrahlung
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The Electronics Readout of the W/Quartz-fibre Calorimeter for the Luminosity Measurement in H1 .
The H1 luminosity system. filter. synch. rad. PD. g. I.P. e. 104 m. p. ET. The Electronics Readout of the W/Quartz-fibre Calorimeter for the Luminosity Measurement in H1. V. Boudry LLR, É cole Polytechnique, on behalf of the H1 Luminosity Group. Bremsstrahlung. - PowerPoint PPT Presentation
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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
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
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