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Testbeam 2008 - Data Analysis

Benchmark Datasets
A series of datasets will be used for "benchmark anaysis". There are available in .mdf, .root or .bin formats. Contact K. Hennessy
Any data set can be used - this will just help you compare results with colleagues!

Datasets on CASTOR

*Noise data: RR_Pulser_Larscfg_HV500_HV500-20080625-153410.mdf*

Test pulse data:

N+n unirradiated/N+n irradiated:

For information on how to use CASTOR (listing, copying etc) see their help pages.

Dataset Formats and decoding

mdf: decode using VETRA
stored in /castor/cern.ch/lhcb/testbeam/lhcbvelo/fnaltb/FNALTestBeam/data1/velo/

ntuples: use root!
stored in /castor/cern.ch/lhcb/testbeam/lhcbvelo/fnaltb/FNALTestBeam/data1/velo/ntuples/

bin: data format:

struct rec{
        int evt;
        int pcn5;
        int pcn8;
        float adcs5[2048];
        float adcs8[2048];
        float head5[256];
        float head8[256];
};

stored in /castor/cern.ch/lhcb/testbeam/lhcbvelo/fnaltb/FNALTestBeam/data1/velo/bindata/

Comments:


*10/July/2008: We note that PCN numbers for TELL5 and TELL8 are out of sync in Noise data set*

p1v1p2.PNG

Also spot that header cross-talk appears to be anomalous for TELL8. The PCN for TELL5 feeds the bits as expected. For TELL8 least significant bit seems to be swapped. Investigating. For those who desire to know what PCN is - its the pipeline column number for the Beetle. It is encoded in 8 bits at the beginning of every output on the chip (4 output/cjip ), 2 bits before each channel is read. The PCN "feeds through" into the observed ADC signals in the first and second ADC channels and must be removed.

PCN decoding First ten events Vetra left, Karol right. These are for TELL5

114 117
84 147
163 68
212 19 
104 127 
74 157
153 78
231 0 
123 108 
93 138

-- KarolHennessy - 10 Jul 2008

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PNGpng p1v1p2.PNG r1 manage 3.0 K 2008-07-10 - 15:30 ThemisBowcock  
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Topic revision: r7 - 2008-07-11 - ThemisBowcock
 
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