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All,</div>
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I forgot to include primexd mailing list. <br>
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tks ig.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Halld-cal <halld-cal-bounces@jlab.org> on behalf of Igal Jaegle <ijaegle@jlab.org><br>
<b>Sent:</b> Thursday, May 14, 2020 10:10 AM<br>
<b>To:</b> halld-cal@jlab.org <halld-cal@jlab.org><br>
<b>Subject:</b> [Halld-cal] FCAL non-linear correction</font>
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All,</div>
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I made an entry in the FCAL logbook, <span><a href="https://logbooks.jlab.org/entry/3810625" id="LPlnk766110">https://logbooks.jlab.org/entry/3810625</a>.</span></div>
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It remains to be proven that one function and one set of parameters can be used for all rings. In the standard GlueX FCAL energy calibration, after a new non-linear correction is applied, in principle the gains should be cross-checked and re-match if needed,
and so on, until the gains and non-linear parameters are converging. I suggest that more robust QA/QC be used for the FCAL energy calibration (I will make a pull request with my improvements later today to FCAL_Pi0HFA) and that Colin continues the FCAL energy
calibration until he sees no changes in the gains and the non-linear parameters for examples by using the QA that the gain should be updated only if the fabs(new gain-old gain)/old gain > 1-1.5% depending on the standard GlueX QA.
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tks ig.</div>
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PS: I think, the classical approach while maybe more complicated, requires fewer iterations and is working at least for pi0!<br>
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