bank_ftm
FTM Muon Fitter Summary bank. One for each event
=================================================
Contact: N. Tagg, Guelph.
Revision History:-
================
3.02 N. Tagg FTM fitter, new version.
4.02 N. Tagg FTM fitter, newer version.
N. west Add structural link to FTXA
5.00 T. Tsui FTM bank updated - removed 19 entries and added 5
Description
-----------
This document only describes time fitter extensions to the generic FTx bank.
See:-
ftx
for a description of the FTx bank.
Reference Links
---------------
No extensions.
Structural Links
----------------
-1 -KFTX_FTXV FTMV Link to first fit vertex.
-2 -KFTX_FTXA FTXA Link to fit analysis bank.
No extensions.
Status Bits
-----------
Note: Any status bit parameters are defined to work with bit functions such as
IAND and BTEST.
Data Words
----------
Data types: B(bit), I, F, D(double), H(hollerith 4 char)
>+9 The first 8 words are as for FTx bank.
+9 F KFTM_ChiDof Chi-squared per tube used in fit.
+10 F KFTM_NTubes_GoodCharge Number of tubes passing charge cut.
+11 F KFTM_NTubes_GoodGuess Number of tubes inside time window of the best trial fit.
+12 F KFTM_NTubes_CutChisq Number of tubes inside time window.
+13 F KFTM_PFit Impact parameter of final fit. See user manual.
+14 F KFTM_Length Length of fit muon track inside PSUP.
+15 F KFTM_eta Muon diretion vector zenith angle (0=upgoing)
+16 F KFTM_psi Muon diretion vector azimuthal angle
+17 F KFTM_EXIT_X |
+18 F KFTM_EXIT_Y | Postion and time the muon exited PSUP, final fit
+19 F KFTM_EXIT_Z |
+20 F KFTM_EXIT_T |
+21 F KFTM_MeanQ Mean charge on all tubes.
+22 F KFTM_RMSQ RMS of charge on all tubes.
+23 F KFTM_MeanT Mean calibrated time of all tubes.
+24 F KFTM_RMST RMS of calibrated time of tall tubes.
+25 F KFTM_pcorr Fitted Impact parameter, corrected for
fitter pull.
+26 F KFTM_dEdX Total charge / track length, pe/cm
+27 F KFTM_delta_t Time elapsed since last event FTM processed.
The next section deals mainly with estimators of goodness-of-fit.
+28 F KFTM_AllTubes_Chisq Chi-squared per tube using all tubes in event.
+29 F KFTM_Ntubes_Agree Number of all tubes for which fit time is good to within 1 sigma
of measured time
+30 F KFTM_qMean_Agree The fraction of all charge deposited in tubes that agree
to within 1 sigma.
+31 F KFTM_ChiSq_Agree The chi-squared statistic on time residual for tubes
that agree to within 1 sigma.
+32 F KFTM_log_pdf Total log(pdf) of time residuals.
+33 F KFTM_pdf_dof log(pdf) of time residuals divided by number of tubes
+34 F KFTM_NShould Number of tubes that should have fired (see note 1) and did.
+35 F KFTM_FracShould Fraction of tubes that should have fired that DID fire
+36 F KFTM_NShouldnt Number of tubes that shouldn't have fired but did
+37 F KFTM_QShouldnt Total charge of tubes that shouldn't have fired but did
+38 F KFTM_chisq_should Chi-squared of time residuals for tubes that
should have fired and did
+39 F KFTM_should_and_agree Number of tubes that should have fired, did fire,
and had time residuals less than 1 sigma
+40 F KFTM_shouldnt_and_agree Number of tubes that shouldn't have fired but did,
and had a time residuals less than 1 sigma
+41 F KFTM_should_and_disagree Number of tubes that should have fired, did, and had bad
time residuals
+42 F KFTM_shouldnt_and_disagree Number of tubes that shouldn't have fired but did, and had
bad time residuals
+43 F KFTM_owl_tubes_online Number of OWL tubes for active during event (IS_TUBE_ON())
+44 F KFTM_neck1_charge The charge recorded in the first neck tube
+45 F KFTM_neck2_charge The charge recorded in the second neck tube
+46 F KFTM_neck1_time The time of the first neck tube
+47 F KFTM_neck2_time The time of the second neck tube
+48 F KFTM_nExitWoundShould The number of tubes in the exit wound
(See note 3)
+49 F KFTM_nExitWoundDid The number of tubes in the exit wound that fired
+50 F KFTM_qExitWound The total charge in the tubes of the exit wound
The following entries are extracted from MC data, if the event has an MC bank.
+51 F KFTM_mc_p True impact parameter
+52 F KFTM_mc_eta True muon diretion vector zenith angle
+53 F KFTM_mc_psi True muon diretion vector azimuthal angle
+54 F KFTM_mc_xstop |
+55 F KFTM_mc_ystop | The stopping position of the muon. (See note 4)
+56 F KFTM_mc_zstop |
Notes
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(1) "Agreeing" tubes are tubes where tfit-t is less than 1.6 ns.
(2) Tubes that "should" fire are defined as:
- in the forward Cherenkov cone of the muon entrance wound, given the fit
- tube_is_on() returns true.
Tubes that "shouldn't" fire are outside the Cherenkov cone, and on.
(3) Tubes 'in the exit wound' are such that they should have been hit by light
from the muon when the muon was 100 cm away from the exit point (on the PSUP)
(4) If all MCVX banks are kept during simulation, FTM will find the last muon
vertex in the chain; this is either where the muon left the detector volume,
or where it stopped. This is useful for looking at low-energy muons. If there
is no track information this returns the point where the muon left the dectector
projected from the entrance point.
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