version HiLumRead2014_05_20.C

***** KNOWN ISSUES *****

1. Scrambled data in structure 
struct miniEventHeader {
  Int_t burst;          // burst number in run (some may be missing due to 
                        // missing or rejected GADC data) 
  Int_t event;          // event# in run
  Int_t burstEvent;     // event# in burst
  Int_t scaler10mhz;    // 10MHz counter
  Int_t scaler6mhz;     // 6MHz (165ns, accelerator RF) counter
  Int_t firstGated;     // same as firstGADCsample above...???

  Bool_t   isEmpty;     // no activity in S123 and Cherenkov for low rate, 
                        // no activity in (some of) modules and Cherenkov for high rate
  Bool_t   notEmpty;    // some activity detected!
  Bool_t   S123inBeam;  // S123 are placed in the beam
  Bool_t   filledSegment;  // event is in 'active' part of GatedADC record

  Double_t RFperiod;    // RF A*sin(omega*(t+t0)) fit
  Double_t RFfreq;      // RF A*sin(omega*(t+t0)) fit
  Double_t RFamp;       // RF A*sin(omega*(t+t0)) fit
  Double_t TimeGlobal;  // RF A*sin(omega*(t+t0)) fit
  Double_t SignalFactor;// effective signal/noise ratio in GlobalPhase finder

  ....

}
   -  Starting with RFperiod and down, all values are severed. 
   -  Data in .root files looks good when using TBrowser;
   -  Data became ruined immediately after the  "eventTree->GetEntry(iEnt);" statement;
   -  All other trees and branches were taken out of code - no effect; 

2. Abnormal negative amplitudes in eventEssentials.MPICevent[i] (and S123 once in a while). 
   - Rare but annoying occasions. 
   - Will check the reconstruction of amplitude next week. 
   - Most likely caused by 'local' (way too tight?!) baseline subtraction method, when the bunch comes in wrong time relative to RF clock.
   - Such bunches must be identified by pulse position and rejected as BAD!
   - note that in the example below, that S1, S2, S3 also are negative.
   - "drawing" following the Example explains source of the trouble.

Example: 
---------  
samp# 0 T=   0.0ns GADC=    1.3 in=0
samp# 1 T= 165.0ns GADC=   10.3 in=0
samp# 2 T= 330.0ns GADC=    6.3 in=0
samp# 3 T= 495.0ns GADC=   -2.7 in=0
samp# 4 T= 660.0ns GADC=   -6.7 in=0
samp# 5 T= 825.0ns GADC=   61.3 in=0
samp# 6 T= 990.0ns GADC=   14.3 in=0
samp# 7 T=1155.0ns GADC=    3.3 in=1  MPIC=     3.2   tracks: S123=( -0.0   0.0  -0.0) N=  0   act=2
samp# 8 T=1320.0ns GADC=   -5.7 in=1  MPIC=     0.4   tracks: S123=(  1.6   1.8   1.8) N=  2   act=1
samp# 9 T=1485.0ns GADC=  -11.7 in=1  MPIC=     2.3   tracks: S123=( -0.0   0.0  -0.0) N=  0   act=0
samp#10 T=1650.0ns GADC=   -7.7 in=1  MPIC=     0.6   tracks: S123=( -0.0  -0.0  -0.0) N=  0   act=0
samp#11 T=1815.0ns GADC=    5.3 in=1  MPIC=     1.3   tracks: S123=(  0.0  -0.0  -0.0) N=  0   act=0
samp#12 T=1980.0ns GADC=    5.3 in=1  MPIC=     3.9   tracks: S123=( -0.0   0.0  -0.0) N=  0   act=2
samp#13 T=2145.0ns GADC=   -6.7 in=1  MPIC=     2.4   tracks: S123=(  0.0   0.0  -0.0) N=  0   act=2
samp#14 T=2310.0ns GADC=  -10.7 in=1  MPIC=    -1.6   tracks: S123=(  0.0  -0.0   0.0) N=  0   act=2
samp#15 T=2475.0ns GADC=   -1.7 in=1  MPIC=    -3.9   tracks: S123=(  0.0   0.0   0.0) N=  0   act=2
samp#16 T=2640.0ns GADC=    3.3 in=1  MPIC=    -1.2   tracks: S123=(  0.0  -0.0   0.0) N=  0   act=2
samp#17 T=2805.0ns GADC=   -7.7 in=1  MPIC=     2.0   tracks: S123=(  0.0  -0.0  -0.0) N=  0   act=2
samp#18 T=2970.0ns GADC=  -12.7 in=1  MPIC=     1.8   tracks: S123=( -0.0   0.0  -0.0) N=  0   act=1
samp#19 T=3135.0ns GADC=   -3.7 in=1  MPIC=     9.5   tracks: S123=(  1.7   1.8   2.3) N=  2   act=1
samp#20 T=3300.0ns GADC=  113.3 in=1  MPIC=   124.5   tracks: S123=(  1.7   2.2   0.8) N=  1   act=1
samp#21 T=3465.0ns GADC=   16.3 in=1  MPIC=     2.5   tracks: S123=( -0.0  -0.0  -0.0) N=  0   act=0
samp#22 T=3630.0ns GADC=   16.3 in=1  MPIC=    -1.6   tracks: S123=(  0.0  -0.0  -0.0) N=  0   act=0
samp#23 T=3795.0ns GADC=   -3.7 in=1  MPIC=     0.2   tracks: S123=( -0.0  -0.0   0.0) N=  0   act=0
samp#24 T=3960.0ns GADC=   -0.6 in=1  MPIC=     1.1   tracks: S123=(  0.0   0.0  -0.0) N=  0   act=2
samp#25 T=4125.0ns GADC=   -6.6 in=1  MPIC=    -0.2   tracks: S123=(  0.0   0.0   0.0) N=  0   act=2
samp#26 T=4290.0ns GADC=   -3.6 in=1  MPIC=     1.4   tracks: S123=(  0.0   0.0  -0.0) N=  0   act=2
samp#27 T=4455.0ns GADC=    4.4 in=1  MPIC=     3.6   tracks: S123=(  0.0  -0.0   0.0) N=  0   act=2
samp#28 T=4620.0ns GADC=   -6.6 in=1  MPIC=     3.2   tracks: S123=(  0.0   0.0   0.0) N=  0   act=2
samp#29 T=4785.0ns GADC=    9.4 in=1  MPIC=   -97.3   tracks: S123=( -0.7  -6.3  -3.5) N=  0   act=1 NEGATIVE
samp#30 T=4950.0ns GADC=   -6.6 in=1  MPIC=     4.7   tracks: S123=( -0.0  -0.0  -0.0) N=  0   act=0
samp#31 T=5115.0ns GADC=    6.4 in=1  MPIC=     2.5   tracks: S123=(  0.0  -0.1  -0.0) N=  0   act=0
samp#32 T=5280.0ns GADC=    4.4 in=1  MPIC=     1.4   tracks: S123=( -0.0   0.0   0.0) N=  0   act=0
samp#33 T=5445.0ns GADC=    0.4 in=1  MPIC=    -1.0   tracks: S123=(  0.0  -0.0  -0.0) N=  0   act=2
samp#34 T=5610.0ns GADC=    0.4 in=1  MPIC=     2.2   tracks: S123=( -0.0   0.0  -0.0) N=  0   act=2
samp#35 T=5775.0ns GADC=    2.4 in=1  MPIC=     2.9   tracks: S123=(  0.0  -0.0   0.0) N=  0   act=2
samp#36 T=5940.0ns GADC=    1.4 in=0
samp#37 T=6105.0ns GADC=   -2.6 in=0

Good signal
            .
            ..
            . .
    RF      .  .        RF  "RF to RF" = 165ns
 ...........     ..........
     | ---- +++++++ ---- |     intervals "---" constitute baseline, "++++" - signal
       35ns  70ns  35ns


Negative signal! Seen those occasionnaly, shall be removed by timing criteria
(half-rise time mark).
                  .
                  ..
                  . .
    RF            .  .  RF     "RF to RF" = 165ns
   ...............     ..........
     | ---- +++++++ ---- |     intervals "---" constitute baseline, "++++" - signal
       35ns  70ns  35ns