Hall A Analyzer

h1.  Podd Analyzer Variables

After initializing the analyzer you can see the variables by typing:

<pre>

        analyzer[2] gHaVars->Print()

</pre>

or

<pre>

        analyzer[2] T->Print()

</pre> 

Here is a partial list with comments explaining the variables

I. General run info

<pre>

OBJ: THaVar     g.runnum        Run number

OBJ: THaVar     g.runtype       CODA run type

OBJ: THaVar     g.runtime       CODA run time

OBJ: THaVar     g.evnum Event number

OBJ: THaVar     g.evtyp Event type

OBJ: THaVar     g.evlen Event Length

</pre>

There are usually also variables "fEvtHdr.*"  with 

self-documenting meaning.

II. Track info.  This is on the Right-HRS (R).  For Left-HRS, replace R with L.

Golden track info 

Available if you've added it in the analysis script, e.g. 

gHaPhysics->Add( new THaGoldenTrack( "R.gold", "HRS-R Golden Track", "R" ));

Golden = Best track in TRANSPORT coordinates at target.

X is dispersive, or vertical, direction, Y perpendicular.

th = theta (vertical), ph = phi (nominal scattering angle, horizontal)

R.gold.x

R.gold.y

R.gold.th

R.gold.ph

dp = fractional momentum

R.gold.dp

"ok" flag 

R.gold.ok

The following is in the TRANSPORT coordinate system

in the shield hut.

Z along the nominal beam direction at the

detectors, and at Z = 0 which is the Z location of 

the first VDC plane.  The average user probably doesn't

need these variables; instead use "golden track".

<pre>

OBJ: THaVar     R.tr.n  Number of tracks

OBJ: THaVar     R.tr.x  Track x coordinate (m)

OBJ: THaVar     R.tr.y  Track x coordinate (m)

OBJ: THaVar     R.tr.th Tangent of track theta angle

OBJ: THaVar     R.tr.ph Tangent of track phi angle

OBJ: THaVar     R.tr.p  Track momentum (GeV)

OBJ: THaVar     R.tr.flag       Track status flag

OBJ: THaVar     R.tr.chi2       Track's chi2 from hits

OBJ: THaVar     R.tr.ndof       Track's NDoF

</pre>

The following is in the "detector coordinate system".

This is also a TRANSPORT style system but Z is perpendicular

to the VDCs, i.e 45 degrees to the nominal beam direction.

<pre>

OBJ: THaVar     R.tr.d_x        Detector x coordinate (m)

OBJ: THaVar     R.tr.d_y        Detector y coordinate (m)

OBJ: THaVar     R.tr.d_th       Detector tangent of theta

OBJ: THaVar     R.tr.d_ph       Detector tangent of phi

</pre>

Rotated coordinates (for experts only)

<pre>

OBJ: THaVar     R.tr.r_x        Rotated x coordinate (m)

OBJ: THaVar     R.tr.r_y        Rotated y coordinate (m)

OBJ: THaVar     R.tr.r_th       Rotated tangent of theta

OBJ: THaVar     R.tr.r_ph       Rotated tangent of phi

</pre>

Here are quantities at the target. See also the "golden

track" above.  Theta is vertical angle, phi is horizontal.  

Y is in the scattering plane perpendicular to the direction, 

with sign conventions: +Y is left of beam on Left HRS and 

+Y is also left of beam on Right HRS.

<pre>

OBJ: THaVar     R.tr.tg_y       Target y coordinate

OBJ: THaVar     R.tr.tg_th      Tangent of target theta angle

OBJ: THaVar     R.tr.tg_ph      Tangent of target phi angle

OBJ: THaVar     R.tr.tg_dp      Target delta

OBJ: THaVar     R.tr.px Lab momentum x (GeV)

OBJ: THaVar     R.tr.py Lab momentum y (GeV)

OBJ: THaVar     R.tr.pz Lab momentum z (GeV)

OBJ: THaVar     R.tr.vx Vertex x (m)

OBJ: THaVar     R.tr.vy Vertex y (m)

OBJ: THaVar     R.tr.vz Vertex z (m)

OBJ: THaVar     R.tr.pathl      Pathlength from tg to fp (m)

OBJ: THaVar     R.tr.time       Time of track@Ref Plane (s)

OBJ: THaVar     R.tr.dtime      uncer of time (s)

OBJ: THaVar     R.tr.beta       Beta of track

OBJ: THaVar     R.tr.dbeta      uncertainty of beta

OBJ: THaVar     R.status        Bits of completed analysis stages

OBJ: THaVar     R.trg.evtime    Time-offset for event (trg based)

OBJ: THaVar     R.trg.evtype    Earliest trg-bit for the event

OBJ: THaVar     R.trg.trgtimes  Times for each trg-type

</pre>

III. VDC detector data.  The planes are u1,u2,v1,v2.

Shown here is only u1.

<pre>

OBJ: THaVar     R.vdc.u1.nhit   Number of hits

wire, rawtime, time are arrays.

OBJ: THaVar     R.vdc.u1.wire   Active wire numbers

OBJ: THaVar     R.vdc.u1.rawtime        Raw TDC values of wires

OBJ: THaVar     R.vdc.u1.time   TDC values of active wires

OBJ: THaVar     R.vdc.u1.dist   Drift distances

OBJ: THaVar     R.vdc.u1.ddist  Drft dist uncertainty

OBJ: THaVar     R.vdc.u1.trdist Dist. from track

OBJ: THaVar     R.vdc.u1.nclust Number of clusters

OBJ: THaVar     R.vdc.u1.clsiz  Cluster sizes

OBJ: THaVar     R.vdc.u1.clpivot        Cluster pivot wire num

OBJ: THaVar     R.vdc.u1.clpos  Cluster intercepts (m)

OBJ: THaVar     R.vdc.u1.slope  Cluster best slope

OBJ: THaVar     R.vdc.u1.lslope Cluster local (fitted) slope

OBJ: THaVar     R.vdc.u1.t0     Timing offset (s)

OBJ: THaVar     R.vdc.u1.sigsl  Cluster slope error

OBJ: THaVar     R.vdc.u1.sigpos Cluster position error (m)

OBJ: THaVar     R.vdc.u1.sigt0  Timing offset error (s)

OBJ: THaVar     R.vdc.u1.clchi2 Cluster chi2

OBJ: THaVar     R.vdc.u1.clndof Cluster NDoF

OBJ: THaVar     R.vdc.u1.cltcor Cluster Time correction

</pre>

IV. Scintillator data for s1,s2 and sometimes s0 if it exists.

Shown here is only s1.

<pre>

OBJ: THaVar     R.s1.nlthit     Number of Left paddles TDC times

OBJ: THaVar     R.s1.nrthit     Number of Right paddles TDC times

OBJ: THaVar     R.s1.nlahit     Number of Left paddles ADCs amps

OBJ: THaVar     R.s1.nrahit     Number of Right paddles ADCs amps

</pre>

lt*, rt*, la*, ra* are arrays 

<pre>

OBJ: THaVar     R.s1.lt TDC values left side

OBJ: THaVar     R.s1.lt_c       Corrected times left side

OBJ: THaVar     R.s1.rt TDC values right side

OBJ: THaVar     R.s1.rt_c       Corrected times right side

OBJ: THaVar     R.s1.la ADC values left side

OBJ: THaVar     R.s1.la_p       Corrected ADC values left side

OBJ: THaVar     R.s1.la_c       Corrected ADC values left side

OBJ: THaVar     R.s1.ra ADC values right side

OBJ: THaVar     R.s1.ra_p       Corrected ADC values right side

OBJ: THaVar     R.s1.ra_c       Corrected ADC values right side

OBJ: THaVar     R.s1.nthit      Number of paddles with l&r TDCs

OBJ: THaVar     R.s1.t_pads     Paddles with l&r coincidence TDCs

OBJ: THaVar     R.s1.y_t        y-position from timing (m)

OBJ: THaVar     R.s1.y_adc      y-position from amplitudes (m)

OBJ: THaVar     R.s1.time       Time of hit at plane (s)

OBJ: THaVar     R.s1.dtime      Est. uncertainty of time (s)

OBJ: THaVar     R.s1.dedx       dEdX-like deposited in paddle

OBJ: THaVar     R.s1.troff      Trigger offset for paddles

OBJ: THaVar     R.s1.trn        Number of tracks for hits

OBJ: THaVar     R.s1.trx        x-position of track in det plane

OBJ: THaVar     R.s1.try        y-position of track in det plane

OBJ: THaVar     R.s1.trpath     TRCS pathlen of track to det plane

OBJ: THaVar     R.s1.trdx       track deviation in x-position (m)

OBJ: THaVar     R.s1.trpad      paddle-hit associated with track

</pre>

V. Cherenkov detector

<pre>

OBJ: THaVar     R.cer.nthit     Number of Left paddles TDC times

OBJ: THaVar     R.cer.nahit     Number of Right paddles TDC times

OBJ: THaVar     R.cer.t TDC values

OBJ: THaVar     R.cer.t_c       Corrected TDC values

OBJ: THaVar     R.cer.a ADC values

OBJ: THaVar     R.cer.a_p       Ped-subtracted ADC values 

OBJ: THaVar     R.cer.a_c       Corrected ADC values

OBJ: THaVar     R.cer.asum_p    Sum of ADC minus pedestal values

OBJ: THaVar     R.cer.asum_c    Sum of corrected ADC amplitudes

OBJ: THaVar     R.cer.trx       x-position of track in det plane

OBJ: THaVar     R.cer.try       y-position of track in det plane

OBJ: THaVar     R.cer.trpath    TRCS pathlen of track to det plane

</pre>

VI. Preshower "ps".  The variabls a,a_p,a_c are arrays.

The shower and pion rejectors are similar, but usually

replace "ps" by "sh", "prl1", "prl2" (conventional naming).

<pre>

OBJ: THaVar     R.ps.nhit       Number of hits

OBJ: THaVar     R.ps.a  Raw ADC amplitudes

OBJ: THaVar     R.ps.a_p        Ped-subtracted ADC amplitudes

OBJ: THaVar     R.ps.a_c        Calibrated ADC amplitudes

OBJ: THaVar     R.ps.asum_p     Sum of ped-subtracted ADCs

OBJ: THaVar     R.ps.asum_c     Sum of calibrated ADCs

OBJ: THaVar     R.ps.nclust     Number of clusters

OBJ: THaVar     R.ps.e  Energy (MeV) of largest cluster

OBJ: THaVar     R.ps.x  x-position (cm) of largest cluster

OBJ: THaVar     R.ps.y  y-position (cm) of largest cluster

OBJ: THaVar     R.ps.mult       Multiplicity of largest cluster

OBJ: THaVar     R.ps.nblk       Numbers of blocks in main cluster

OBJ: THaVar     R.ps.eblk       Energies of blocks in main cluster

OBJ: THaVar     R.ps.trx        track x-position in det plane

OBJ: THaVar     R.ps.try        track y-position in det plane

</pre>