Documentation

Loads Pbsc static Data
The calibration data base is loaded from files written in 902 during calibration
Data from 902 Data BAse is loaded only for interactive use from PbSc EMCal Hardware Control Window. Even in that case - only shortened version of the data decribed below is available to user, namely - parameters and bits of history for the PMT and results of before-the-installation on-the-sector testing with laser and muons. When those results are unavailable - data will be missing
What is copied into "NewData" are 12 words from PMT DB calibration data per Energy Range (see below). If data looks bad - there will be three words from earlier measurements made on sector (photocell and laser) which are copied without even bothering to check if they are meaninful. This resulted in a bit of screw-up (data from 5 GeV Laser test mixed with data from 2 geV recalibration?).

INDY Data - Base Structure
1 - Bar code
2 - MELZ number
3 - MELZ Quantum Efficiency
4 - MELZ HV
5 - MELZ Dark Current
6 - MELZ Uniformity
7 - MELZ Slope
8 - MELZ Scale
9 - Flag to indicate manual modifications to the gain (Ratio:New/Old)
10 - Reject Code (copied from Usachev) Used to indicate if PMT is alive (code 0) and well or dead or lost (nonzero code)
11 - Where I am
1 - Loaded into data - base from Fox-Pro DB
2 - on shelf (means measurements are available)
3 - matched to EMCal (means - results of matching are available)
12 - Fit (measurement) Status Code
0 - Status unknown
1 - Fit results accepted
2 - fit results available but unacceptable. Needs remeasurements or fit to be repeated using restricted set of measurements
3 - measurements available but all rejected. Fit failed
11 - Data looked fine but PMT was replaced after box test
- needs new measurement
13 - Total number of measurements available to fitting procedure
14 - Number of measurements used in the fit (last iteration)
15 - Location for the principal run used in fitting
16 - Slope
17 - Gain
18 - LY correction factor used in gain computation
19 - PMT test stand run used as a principal measurement
20 - Measurement story =
Number of independent meas. series + 100 * Number of meas. serie retained
21 - Supermodule number
22 - Tower
23 - Tower light yield (photons per GeV) (AGAMGEV) !!!!!!!!!!!!!!!!!!!!!!!!!!
24 - Muon Peak Position
25 - Photocell peak position
26 - Photocell test pulse peak position
27 - Laser peak position
28 - Computed equivalent in photons for Laser signal
29 - Gain Correction factor used for matching
30 - HV ( 5 GeV)
31 - HV (16 GeV)
32 - HV (80 GeV)

33 - Predicted System Gain for 16 GeV dynamic range (pc/GeV)
The next few values are computed assuming all amplitudes are measured in units of 0.043 pc (WA98 board)
34 - Number of photoelectrons from laser during calibration (from raw width)
35 - Number of photoelectrons from laser during calibration (from norm. width)
36 -
37 -

38 - Flag to indicate that this PMT replaced earlier allocation in the same channel ("old" PMT barcode)

Local variables which will later go into the final DB
39 - amplitude measured on the test box prior to installation (at HV5)
40 - used to store LGAMGEV from calibration in 902 !!!!!!!!!!!!!!!!!!!!!!!!!!!!

Results of on-sectors testing with laser
5 GeV Gain settings
41 - Hamamatsu peak position
42 - Photocell peak position
43 - Photocell test pulse peak position
44 - Average Laser amplitude
16 GeV Gain settings
45 - Hamamatsu peak position
46 - Photocell peak position
47 - Photocell test pulse peak position
48 - Average Laser amplitude
80 GeV Gain settings
49 - Hamamatsu peak position
50 - Photocell peak position
51 - Photocell test pulse peak position
52 - Average Laser amplitude

Results of the on-sectors lateral muon calibration (when available)
If PMT Data Base is loaded (PXEMC) - all 12 words are copied into NewData area
pop,l_cur,l_rms,laser0,p2h,p3h,p2h0,p3h0,phigh,rmshigh
2 GeV Gain settings
56 - Confidence Flag (Laser data)
57 - Photocell peak position (N2)
58 - Photocell peak position (YAG)
59 - Photocell test pulse peak position
60 - Average Laser amplitude (N2)
61 - RMS of the laser amplitude (N2)
62 - Average Laser amplitude (YAG)
63 - RMS of the laser amplitude (YAG)
64 - Confidence Flag (Muon data)
65 - Muon population
66 - Muon peak position - final
67 - RMS of the muon peak - final
5 GeV Gain settings
71 - Confidence Flag (Laser data)
72 - Photocell peak position (N2)
73 - Photocell peak position (YAG)
74 - Photocell test pulse peak position
75 - Average Laser amplitude (N2)
76 - RMS of the laser amplitude (N2)
77 - Average Laser amplitude (YAG)
78 - RMS of the laser amplitude (YAG)
79 - Confidence Flag (Muon data)
80 - Muon population
81 - Muon peak position - final
82 - RMS of the muon peak - final
16 GeV Gain settings
86 - Confidence Flag (Laser data)
87 - Photocell peak position (N2)
88 - Photocell peak position (YAG)
89 - Photocell test pulse peak position
90 - Average Laser amplitude (N2)
91 - RMS of the laser amplitude (N2)
92 - Average Laser amplitude (YAG)
93 - RMS of the laser amplitude (YAG)
94 - Confidence Flag (Muon data)
95 - Muon population.
96 - Muon peak position - final.
97 - RMS of the muon peak - final

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