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=========== |
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LEVEL2 data |
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* |
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(R-3.00) |
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=========== |
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|
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LEVEL2 nt-uple structure: |
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|
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****************************************************************** |
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* Ntuple ID = 22 Entries = 4519 LEVEL2 |
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****************************************************************** |
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* Var numb * Type * Packing * Range * Block * Name * |
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****************************************************************** |
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* 1 * L*4 * 1 * * GENERAL * GOOD2 |
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* 2 * I*4 * * * GENERAL * NEV2 |
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* 3 * I*4 * * * GENERAL * WHIC_CALIB |
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* 4 * I*4 * * * GENERAL * SWCODE |
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* 5 * L*4 * 1 * * GENERAL * CRC(12) |
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* 1 * U*4 * 6 * [0,50] * CPU * PKT_TYPE |
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* 2 * I*4 * * * CPU * PKT_NUM |
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* 3 * I*4 * * * CPU * OBT |
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* 4 * L*4 * 1 * * CPU * CPU_CRC |
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* 1 * I*4 * * [0,50] * TRACKS * NTRK |
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* 2 * U*4 * 6 * [0,50] * TRACKS * IMAGE(NTRK) |
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* 3 * R*4 * * * TRACKS * XM(6,NTRK) |
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* 4 * R*4 * * * TRACKS * YM(6,NTRK) |
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* 5 * R*4 * * * TRACKS * ZM(6,NTRK) |
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* 6 * R*4 * * * TRACKS * RESX(6,NTRK) |
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* 7 * R*4 * * * TRACKS * RESY(6,NTRK) |
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* 8 * R*4 * * * TRACKS * AL(5,NTRK) |
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* 9 * R*4 * * * TRACKS * COVAL(5,5,NTRK) |
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* 10 * R*4 * * * TRACKS * CHI2(NTRK) |
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* 11 * U*4 * 1 * [0,1] * TRACKS * XGOOD(6,NTRK) |
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* 12 * U*4 * 1 * [0,1] * TRACKS * YGOOD(6,NTRK) |
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* 13 * R*4 * * * TRACKS * XV(6,NTRK) |
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* 14 * R*4 * * * TRACKS * YV(6,NTRK) |
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* 15 * R*4 * * * TRACKS * ZV(6,NTRK) |
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* 16 * R*4 * * * TRACKS * AXV(6,NTRK) |
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* 17 * R*4 * * * TRACKS * AYV(6,NTRK) |
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* 18 * R*4 * * * TRACKS * DEDX_X(6,NTRK) |
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* 19 * R*4 * * * TRACKS * DEDX_Y(6,NTRK) |
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* 1 * I*4 * * [0,500] * SINGLETX * NCLSX |
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* 2 * I*4 * * * SINGLETX * PLANEX(NCLSX) |
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* 3 * R*4 * * * SINGLETX * XS(NCLSX) |
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* 4 * R*4 * * * SINGLETX * SGNLXS(NCLSX) |
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* 5 * I*4 * * [0,500] * SINGLETY * NCLSY |
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* 6 * I*4 * * * SINGLETY * PLANEY(NCLSY) |
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* 7 * R*4 * * * SINGLETY * YS(NCLSY) |
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* 8 * R*4 * * * SINGLETY * SGNLYS(NCLSY) |
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****************************************************************** |
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* Block * Entries * Unpacked * Packed * Packing Factor * |
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****************************************************************** |
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* GENERAL * 4519 * 16 * 13 * 1.231 * |
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* CPU * 4519 * 16 * 9 * 1.778 * |
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* TRACKS * 4519 * 23252 * Var. * Variable * |
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* SINGLETS * 4519 * 12008 * Var. * Variable * |
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* Total * --- * 35292 * Var. * Variable * |
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****************************************************************** |
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* Blocks = 4 Variables = 36 Max. Columns = 8823 * |
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****************************************************************** |
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|
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The GENERAL block stores the global event flag GOOD2, the event counter NEV2, |
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a variable that relates each event to the calibration parameters (WHICH_CALIB) |
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the version number of the software (SWCODE) and the result of the crc check for |
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the 12 views of th etracking system (CRC(12)). |
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If WHICH_CALIB=0 (missing calibration) then GOOD2=.FALSE. |
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|
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The CPU block stores the event tag extracted from the physics-packet |
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CPU-header (PKT_TYPE, PKT_NUM, OBT, CPU_CRC) . |
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|
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The TRACKS block stores track information: |
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NTRK - number of identified tracks (in case the Y ambiguity is not |
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solved both the track images are stored) |
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IMAGE(NTRK) - ID of the track image (=0 if no image) |
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XM(6,NTRK) - measured coordinates associated to the track |
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YM(6,NTRK) ' |
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ZM(6,NTRK) ' |
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RESX(6,NTRK) - spatial resolution associated to each coordinate |
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RESY(6,NTRK) ' |
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AL(5,NTRK) - TRACK PARAMETERS: X0,Y0,sin(THETA0),PHI0,DEFLECTION |
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COVAL(5,5,NTRK)- Variance/covariance matrix of parameters |
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CHI2(NTRK) - reduced chi^2 of the track |
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XGOOD(6,NTRK) - flag indicating if a plane was included in the track fitting |
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YGOOD(6,NTRK) ' |
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XV(6,NTRK) - calculated coordinates |
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YV(6,NTRK) ' |
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ZV(6,NTRK) ' |
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AXV(6,NTRK) - calculated angles |
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AYV(6,NTRK) ' |
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DEDX_X(6,NTRK) - energy release in MIP, scaled to 300 microns, for x clusters |
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DEDX_Y(6,NTRK) - energy release in MIP, scaled to 300 microns, for y clusters |
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|
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The SINGLETS block stores information about those clusters not associated with |
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any track: |
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NCLSX - number of singlets on the x views |
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PLANEX(NCLSX) - plane which the i-th x-singlet belong to |
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XS(NCLSX) - coordinate |
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SGNLXS(NCLSX) - signal in MIP (not scaled) |
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NCLSY - number of singlets on the y views |
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PLANEY(NCLSY) - plane which the i-th y-singlet belong to |
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YS(NCLSY) - coordinate |
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SGNLYS(NCLSY) - signal in MIP (not scaled) |
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