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Thank you, Stjepan. Zisis & CAL experts what are your inputs? <br>
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tks ig.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size: 11pt; color: rgb(0, 0, 0);" face="Calibri, sans-serif"><b>From:</b> soy062 <soy062@uregina.ca><br>
<b>Sent:</b> Monday, June 12, 2023 1:38 PM<br>
<b>To:</b> Igal Jaegle <ijaegle@jlab.org><br>
<b>Cc:</b> Karthik Suresh <ksv656@uregina.ca>; Mark Macrae Dalton <dalton@jlab.org>; Rory Miskimen <miskimen@physics.umass.edu>; Zisis Papandreou <zisis@uregina.ca><br>
<b>Subject:</b> Re: [EXTERNAL] Re: CPP/NPP BCAL calibration status</font>
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<div class="PlainText">Hello Igal,<br>
<br>
I looked at the layer 3 plots, and indeed, they don't seem to be <br>
converging. Even the fits in the 2y reconstructed mass look very weird <br>
and don't seem to improve per iteration. This is probably very closely <br>
related to the aforementioned issues with Layer 3. Usually I've never <br>
seen this behaviour for the background and total fits, as things looked <br>
rather clean for other experiments (see attached Be target from PrimEx).<br>
<br>
Also, looking at the coefficient of variation vs. iteration plot, there <br>
is a big drop in the last iteration, which doesn't really reflect in the <br>
other plots (it's essentially zero), so I'm not sure why that happened. <br>
Currently, I'm not sure what advice to give for layer 3, since it seems <br>
to be a complexity related to the CPP/NPP experiment conditions. Maybe <br>
someone can give additional comments on this.<br>
<br>
Best regards,<br>
Stjepan<br>
<br>
On 2023-06-10 10:47, Igal Jaegle wrote:<br>
> Thank you, Karthik, for your input. Ok, the 12th iteration finished<br>
> this morning, layer 1 and 2 did converge although their bands seems<br>
> larger than what you are usually showing. The 3rd layer is all over<br>
> the place because no pi0 resonance is seen, look at<br>
> l3_gain_checking_1.py. What is your advice in this case?<br>
> <br>
> tks ig.<br>
> <br>
> -------------------------<br>
> <br>
> From: Karthik Suresh <ksv656@uregina.ca><br>
> Sent: Friday, June 9, 2023 11:45 PM<br>
> To: Igal Jaegle <ijaegle@jlab.org><br>
> Cc: soy062 <soy062@uregina.ca>; Mark Macrae Dalton <dalton@jlab.org>;<br>
> Rory Miskimen <miskimen@physics.umass.edu>; Zisis Papandreou<br>
> <zisis@uregina.ca><br>
> Subject: Re: [EXTERNAL] Re: CPP/NPP BCAL calibration status<br>
> <br>
> Good evening Igal,<br>
> <br>
> The current procedure is such that the convergence could be slow (due<br>
> the the iterative nature). Also, I doubt if the third layer can be<br>
> calibrated within 1% precision with this method. But I think we could<br>
> conclude that after a few more iterations.<br>
> <br>
> Thank you<br>
> Karthik Suresh<br>
> <br>
> On 2023-06-09 21:26, Igal Jaegle wrote:<br>
>> Thank you, Stjepan, for your answer and help. It seems very slowly<br>
>> converging, see the latest report 8. The first values were not so<br>
> bad,<br>
>> then I did a mistake in the new gain calculation, correct it, then<br>
> it<br>
>> seems to slowly recover but very slowly. Could it be due to the 3rd<br>
>> layer seeing no pi0s? What should be done to the 3rd layer, put<br>
>> default values or the values of the run period precede it or succeed<br>
>> it? What is your suggestion for the 3rd layer?<br>
>> <br>
>> tks ig.<br>
>> <br>
>> -------------------------<br>
>> <br>
>> From: soy062 <soy062@uregina.ca><br>
>> Sent: Friday, June 9, 2023 10:56 PM<br>
>> To: Igal Jaegle <ijaegle@jlab.org><br>
>> Cc: Mark Macrae Dalton <dalton@jlab.org>; Rory Miskimen<br>
>> <miskimen@physics.umass.edu>; Zisis Papandreou <zisis@uregina.ca>;<br>
>> Karthik Suresh <ksv656@uregina.ca><br>
>> Subject: [EXTERNAL] Re: CPP/NPP BCAL calibration status<br>
>> <br>
>> Hi Igal,<br>
>> <br>
>> Sorry for the delayed response. The histograms in the "fit" ROOT<br>
> file<br>
>> are arranged in a cyclical way. For example, starting from 1 to 4<br>
>> (channel number) would be layer 1, 5 to 8 would be layer 2, 9 to 12<br>
>> would be layer 3, 13 to 16 would be layer 4 and then for 17 to 20 we<br>
>> go<br>
>> back to layer 1. The final one is 763.<br>
>> <br>
>> Looking at the plots (pi0gainmatrix.pdf), there seems to be<br>
> something<br>
>> missing in the pipeline. Basically for each iteration the pi0 mass<br>
> is<br>
>> not converging, which means that somewhere along the way the local<br>
>> ccdb<br>
>> gain constants are not getting updated after each iteration or the<br>
>> local<br>
>> ccdb is not getting copied to the right location. This can be seen<br>
> for<br>
>> <br>
>> example in the sigma/mean vs iteration plot, it is constant, which<br>
> it<br>
>> should not be.<br>
>> <br>
>> Best regards,<br>
>> Stjepan<br>
>> <br>
>> On 2023-06-09 16:45, Igal Jaegle wrote:<br>
>>> Bump!<br>
>>> <br>
>>> -------------------------<br>
>>> <br>
>>> From: Igal Jaegle<br>
>>> Sent: Thursday, June 8, 2023 9:20 PM<br>
>>> To: Mark Macrae Dalton <dalton@jlab.org>; Rory Miskimen<br>
>>> <miskimen@physics.umass.edu>; Zisis Papandreou <zisis@uregina.ca>;<br>
>>> Karthik Suresh <ksv656@uregina.ca>; Stjepan Orešić<br>
>>> <soy062@uregina.ca><br>
>>> Subject: CPP/NPP BCAL calibration status<br>
>>> <br>
>>> All,<br>
>>> <br>
>>> I am testing the upgrades of the BCAL gain calibration procedure.<br>
>> The<br>
>>> upgrades free the calibrator of all interventions between each<br>
>>> iteration making the calibration fully automized. I made a wiki<br>
>> which<br>
>>> can be accessed from<br>
>>> <a href="https://halldweb.jlab.org/wiki/index.php/Main_Page" data-auth="NotApplicable">
https://halldweb.jlab.org/wiki/index.php/Main_Page</a> [1] go to,<br>
> Barrel<br>
>>> Carolimter, pi0 gain calibration, and CPP/NPP (2022-05) BCAL pi0<br>
>>> calibration [2]<br>
>>> <br>
>>> The report and individual fit can be found here:<br>
>>> <a href="https://halldweb.jlab.org/primexd/bcal-cal/2022-05/1/" data-auth="NotApplicable">
https://halldweb.jlab.org/primexd/bcal-cal/2022-05/1/</a> [3]<br>
>>> <br>
>>> Stjepan/Karthik, how the layer ordering is working? 1 to 512 first<br>
>>> layer, 513 to 1024 2nd layer, and 1025 to 1534 3rd layer? The 3rd<br>
>> sees<br>
>>> nothing is that an issue? How to solve it? Or leave with it?<br>
>>> <br>
>>> tks ig<br>
>>> <br>
>>> <br>
>>> <br>
>>> Links:<br>
>>> ------<br>
>>> [1] <a href="https://halldweb.jlab.org/wiki/index.php/Main_Page" data-auth="NotApplicable">
https://halldweb.jlab.org/wiki/index.php/Main_Page</a><br>
>>> [2]<br>
>>> <br>
>> <br>
> <a href="https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration" data-auth="NotApplicable">
https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration</a><br>
> [1]<br>
>> [1]<br>
>>> [3] <a href="https://halldweb.jlab.org/primexd/bcal-cal/2022-05/1/" data-auth="NotApplicable">
https://halldweb.jlab.org/primexd/bcal-cal/2022-05/1/</a><br>
>> <br>
>> <br>
>> Links:<br>
>> ------<br>
>> [1]<br>
>> <br>
> <a href="https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration" data-auth="NotApplicable">
https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration</a><br>
> [1]<br>
> <br>
> --<br>
> Karthik Suresh<br>
> <br>
> <br>
> Links:<br>
> ------<br>
> [1] <br>
> <a href="https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration" data-auth="NotApplicable">
https://halldweb.jlab.org/wiki/index.php/CPP/NPP_(2022-05)_BCAL_pi0_calibration</a><br>
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