Download - Experience with SRS and APV Readout of Triple-GEM chambers For Muon Tomography

Experience with SRS and APV Readout of Triple-GEM chambers

For Muon TomographyKondo GNANVO

Florida Institute of Technology, Melbourne FL

K. Gnanvo - RD51 Mini Week, CERN January 2011

Development of AMORE software for online monitoring and data analysis of MT station

Preliminary cosmic data results from triple-GEM chambers with APV/SRS electronics

Plans for the next MT station prototype with full APV/SRS readout electronics

Conclusion

OUTLINE

First Test of the SRS Electronics with triple-GEMs For RD51 Coll. Meeting, Bari, Oct. 2010


Triple-GEM with 12 APV hybrids ADC/FEC card in Euro crate

ALICE DATE for the DAQ

AMORE for online monitoring

Plastic scintillator for trigger


Development of AMORE Software for Online Monitoring and Data analysis of MT Station

AMORE is ALICE Data Quality Monitoring Software framework

Automatic Monitoring Environment founded on ROOT & DATE Monitoring Library

It is based on Publisher/Subscriber paradigm with the detectors publishing their data in a monitoring pool and clients subscribing to the pool to collect data for online monitoring & offline data analysis.

Communication between publisher and clients through DIM a publish/subscribe system developed at CERN



First implementation of the software used to produce the results for RD51 coll. Meeting in Bari October 2010.

Current version contains the following major improvements: Pedestal data are now generated and saved in ROOT files Full set of histograms could be generated Online monitoring display is implemented and defined via configuration files.

Several Amore Agent to be created for specific tasks (to be done later) GEMs testing and commissioning (pedestal data ….) Online monitoring of the MT Station with real time targets imaging Offline data analysis and saving into ROOT files



Raw APV data APV hit and timing information

Pedestal data Offline data analysis

pedestal subtraction

Zero suppression

25 ns time resolution

Cluster charge distribution

Charge sharing X/Y

2D hit Map

Preliminary cosmic data results with triple GEM chambers with APV/SRS electronics


Triple GEM with 12 APV hybrids

MM MSS S

MS

MM

MM

M: Master hybrid

S: Slave hybrid

Blue: hybrid v1

Red: hybrid v2

768 X-S

trips

768 Y-Strips

Five 30 cm x 30 cm triple-GEMs Pedestal run 20K events Cosmic data run (20K events)

12 APV hybrids (5 hybrids v1 and 7 hybrids v2) On X-strips: 5 v1 and 1 v2 On Y-strips: 6 paired on a

master/slave (M/S) configuration The hybrids not grounded to the

detector



Proto v1 ~10 ADC counts

Proto v2~5 ADC counts


Proto v1`10 ADC counts



Strip number Strip number Strip number


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Noise from on the 6 APV hybrids on X-strips (from pedestal run)



Proto v25 ADC counts




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Noise from on the 6 APV hybrids on Y-strips (from pedestal run)



Strip number

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GEM 1: Effect on the strip occupancy over 20K Events

X-axis

Y-axis



GEM 1: Cluster charge distribution & 2D hit distribution

X-Strips Y-Strips

Mean cluster total charge ~25% less than for X strips

2D hit map Uniformity

X-Strips

Y-S

trip

s

Charge sharing X/Y



GEM 1: Cluster size distribution

X-Strips Y-Strips



GEM 5: Low efficiency on the set of Y-strips readout

Gassiplex electronics Labview DAQ (April 2010)

APV/SRS electronics DATE/AMORE DAQ (Oct. 2010)



GEM detectoractive areaFro

nt-end ca

rds

HV board

Target plate

GEM

support

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cut-o

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Full MT Station

Cubic-foot size station (30 cm x 30 cm x 30 cm)

Total of 10 detectors (top and bottom + lateral station)

Mechanical stand with flexible geometry e.g. variable gaps between detectors

120 APV v3 hybrids + SRS to read out more than 15 000 channels

DATE software for DAQ + AMORE for data monitoring & analysis



AMORE software development for the MT station

We plan to integrate POCA reconstruction into the AMORE package

Online and real time target reconstruction during the data acquisition

Extend the data analysis code development

Create task specific AMORE agent


Conclusion

Where we are now: AMORE package developed for APV/SRS system for online

monitoring display and data analysis Preliminary results from the analysis of cosmic data run with 5 FIT

triple-GEMs equipped with APV readout and SRS electronics More detailed studies required to understand issues with APV

hybrid v2 pedestal noises

Where we want to be in the next few months: Tests of APV v3 hybrids, new generation of FEC/ADC cards. Set up the cubic-foot MT station with 10 GEM chambers with

APV/SRS electronics Back to DATE software for the SRS DAQ system Develop a more robust data analysis and MT reconstruction code

based on AMORE

Download - Experience with SRS and APV Readout of Triple-GEM chambers For Muon Tomography

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