[Frost] St calibration meet? (fwd)
Franz Klein
fklein at jlab.org
Wed Mar 31 21:20:46 EDT 2010
Patrick,
let's see whether Chuck and Arthur are getting along with ST and SC
calibrations - if they have too many difficulties, we can change the ST
and SC constants to some later g9a set (this will require some adjustment
of tag2tof and st2tof ... but that should take me only a day or so).
Mukesh's most important remark is that about pedestal runs - which are
done!
Chuck and Arthur, please check out the STN and SC calibration programs.
By early next week we should know whether we can continue or have to link
some other constants!
Good luck
Franz
On Wed, 31 Mar 2010, Patrick Collins wrote:
> What run should they be set to?
> Since we have already adjusted some items, should they be left alone?
> If so, what items should be left alone?
> -Patrick
>
> Franz Klein wrote:
>>
>> Mukesh,
>> I fully agree with you! Shall we change the link to the last g9a
>> constants (I used them in the beginning (2 weeks ago) - and it was
>> better than the g12 as a starting point). If we do change the link, it
>> should be done very soon (because I adjusted already tag2tof and st2tof
>> based on the current (=g12) set of constants). RF and tagger are
>> calibrated (except that for several T-counters I have +2 nsec offsets
>> compared to some paddles of ST ... I'll try to come up with a different,
>> more robust procedure for such 2 nsec offsets ... let's see).
>>
>> Greetings
>> Franz
>>
>> On Mon, 29 Mar 2010, Mukesh Saini wrote:
>>
>>> Hello All,
>>>
>>> I just wanted to offer an opinion. Instead of copying g14 constants
>>> for the ST, Constants from the later g9a period should be copied over
>>> for the g9b. The timewalks and everything should be pretty much the
>>> same as long as the Pedestals are properly taken care of.I am also
>>> assuming PMT's have not been changed for ST and the deterioration of
>>> their gains are minimal. Offsets would be different but that would be
>>> true in any case and that is quickly and easily fixable. Once these
>>> paddle to paddle offsets are adjusted for even one run and copied over
>>> for others, ST should be more or less calibrated for the initial
>>> runperiod.
>>>
>>> So next and the only step for the initial calibration is calibrating
>>> the offsets for one run. If there is a decent run lying around, I can
>>> do that and I can also let Charles know what and how and why I did that.
>>>
>>> Is that a proper approach and conclusion?
>>>
>>> Let me know,
>>> Mukesh.
>>>
>>>
>>> ----- Original Message -----
>>> From: Franz Klein <fklein at jlab.org>
>>> Date: Monday, March 29, 2010 8:57 pm
>>> Subject: Re: St calibration meet? (fwd)
>>> To: Mukesh Saini <msaini at fsu.edu>
>>> Cc: Volker Crede <crede at hadron.physics.fsu.edu>, Mukesh Saini
>>> <mukesh at hadron.physics.fsu.edu>, Charles Taylor <ctaylor at jlab.org>,
>>> Sungkyun Park <skpark at hadron.physics.fsu.edu>
>>>
>>>>
>>>> Thanks, Mukesh!
>>>> Patrick copied the constants of the 'latest' photon run into
>>>> calib_user.RunIndexg9 (i.e. they are g14 constants). However, g14
>>>> had very
>>>> different target and ST positions and therefore many constants were
>>>> off by
>>>> larger amounts. In order to get 'back' to g9 conditions, I changed
>>>> all
>>>> overall constants to what loos reasonable after reconstructing some
>>>> runs
>>>> (different constants for 62165,62185,62225,62314). Generally
>>>> speaking, the
>>>> time offsets for tagger, most tof paddles and some ST paddles are
>>>> around
>>>> zero, but the ST constants have large variations.
>>>> When I ran stn_calib yesterday, I was surprised to see almost all
>>>> fits
>>>> with quite different slopes than before. It was only a trial ...
>>>> and some
>>>> tagger offsets had to be corrected by +/- 2nsec.
>>>> A next run of stn_calib should use data files that were cooked last
>>>> night
>>>> or today.
>>>>
>>>> What I haven't checked is whether the pedestals are up-to-date:
>>>> Chuck, can you ask Eugene about it!
>>>>
>>>> Greetings
>>>> Franz
>>>>
>>>> ps. since I have very time consuming classes this semester, I'm not
>>>> sure
>>>> whether I can do more than tagger calibration for now (RF and
>>>> tagger are
>>>> largely done ... except a few T-counters).
>>>>
>>>> On Mon, 29 Mar 2010, Mukesh Saini wrote:
>>>>
>>>>> Hello All,
>>>>>
>>>>> Charles and I have been in communication. I told him to make sure
>>>> that the Pedestals from the initial Calibration runs are in the
>>>> database so he doesn't go out chasing ghosts later when he or
>>>> somebody else does put them in.
>>>>>
>>>>> Next step would be to use the start counter calibration program
>>>> "stn_calib" to create the root file and look at the histograms. As
>>>> soon as Charles runs them on the new cooked files, he should send
>>>> me the output root file so I and other can decide of it looks
>>>> acceptable or if there are calibration plots we want that are
>>>> missing. Be aware that for some of the constants entered into the
>>>> g9 database, the run range specified were those of g9a. So g9b
>>>> constants might just default to the out-of-date
>>>> calib_user.RunIndex. Especially for ST I was careful to usually
>>>> enter the proper runranges. So Timewalk's and other things might
>>>> need to be copied over.
>>>>>
>>>>> So the next step in the process is for Charles to compile his own
>>>> "stn_calib" or use the one already available in the svn build at:
>>>>>
>>>>> To use the svn build for these softwares first --
>>>>>
>>>>> source /group/clas/builds/32bit/environment32.csh
>>>>>
>>>>> then use my stn_calib at
>>>>>
>>>>> /w/hallb/clasg12/mukesh/clas/bin/stn_calib
>>>>>
>>>>> or the clas svn stable build
>>>>>
>>>>> /group/clas/builds/32bit/STABLE/build/bin/stn_calib
>>>>>
>>>>> on a run and produce the root file with relevant histograms. We
>>>> can look at the histograms and go from there.
>>>>>
>>>>> If anyone has a question or need to ask something that I might be
>>>> able to answer, feel free to raise the issue. I am on the FROST
>>>> mailing list so I should respond soon enough.
>>>>>
>>>>> Take care,
>>>>> Mukesh.
>>>>>
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From: Volker Crede <crede at hadron.physics.fsu.edu>
>>>>> Date: Monday, March 29, 2010 3:37 pm
>>>>> Subject: Re: St calibration meet? (fwd)
>>>>> To: Mukesh Saini <mukesh at hadron.physics.fsu.edu>
>>>>> Cc: Franz Klein <fklein at jlab.org>, Charles Taylor
>>>> <ctaylor at jlab.org>, Volker Crede <crede at fsu.edu>, Sungkyun Park
>>>> <skpark at hadron.physics.fsu.edu>>
>>>>>> Mukesh,
>>>>>>
>>>>>> could you briefly comment on Franz' email?
>>>>>>
>>>>>> Volker
>>>>>>
>>>>>>
>>>>>> ---------- Forwarded message ----------
>>>>>> Date: Mon, 29 Mar 2010 13:48:02 -0400 (EDT)
>>>>>> From: Franz Klein <fklein at jlab.org>
>>>>>> To: ctaylor at jlab.org
>>>>>> Cc: Volker Crede <crede at hadron.physics.fsu.edu>, Sungkyun Park
>>>>>> <sp06k at fsu.edu>Subject: Re: St calibration meet?
>>>>>>
>>>>>>
>>>>>> Chuck,
>>>>>> I looked at the ST code yesterday but it seems that under cvs and
>>>>>> svn are not
>>>>>> the latest versions. Maybe Mukesh can say a word to that.
>>>>>> I hope that I will have time this afternoon to check through the
>>>>>> anamonhist
>>>>>> files to check whether the RF & tagger times didn't change.
>>>>>> My first calibrations were for 62225 and 62312/62314 and 62334 (the
>>>>>> last needs
>>>>>> a few T-counter adjustments).
>>>>>> After I checked status and variations of offsets in anamonhist, we
>>>>>> can start to
>>>>>> do some serious work.
>>>>>>
>>>>>> Chuck, the procedure is the same for any calibration process,
>>>>>> whether it's
>>>>>> version 0 or for final cooking.
>>>>>>
>>>>>> Talk to you later
>>>>>> Franz
>>>>>>
>>>>>> On Mon, 29 Mar 2010, ctaylor at jlab.org wrote:
>>>>>>
>>>>>>> Franz and Sungkyun,
>>>>>>>
>>>>>>> Would it be possible to meet to see how I could be of assistance?
>>>>>>>
>>>>>>> -Chuck
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ===============================================================
>>>>>> Franz J. Klein, Associate Professor
>>>>>> CUA, Department of Physics
>>>>>> Washington, DC 20064
>>>>>> office: Hannan Hall 206 phone: 202-319-6190
>>>>>> or: Jefferson Lab,CC F-243 phone: 757-269-6671
>>>>>> ---------------------------------------------------------------
>>>>>>
>>>>>
>>>>> Graduate Student,
>>>>> Florida State University.
>>>>>
>>>>
>>>> ===============================================================
>>>> Franz J. Klein, Associate Professor
>>>> CUA, Department of Physics
>>>> Washington, DC 20064
>>>> office: Hannan Hall 206 phone: 202-319-6190
>>>> or: Jefferson Lab,CC F-243 phone: 757-269-6671
>>>> ---------------------------------------------------------------
>>>>
>>>>
>>>
>>> Graduate Student,
>>> Florida State University.
>>>
>>
>> ===============================================================
>> Franz J. Klein, Associate Professor
>> CUA, Department of Physics
>> Washington, DC 20064
>> office: Hannan Hall 206 phone: 202-319-6190
>> or: Jefferson Lab,CC F-243 phone: 757-269-6671
>> ---------------------------------------------------------------
>>
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> https://mailman.jlab.org/mailman/listinfo/frost
>
===============================================================
Franz J. Klein, Associate Professor
CUA, Department of Physics
Washington, DC 20064
office: Hannan Hall 206 phone: 202-319-6190
or: Jefferson Lab,CC F-243 phone: 757-269-6671
---------------------------------------------------------------
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