[Halld-offline] Offline Software Meeting Minutes, April 29, 2015
Mark Ito
marki at jlab.org
Thu Apr 30 11:45:00 EDT 2015
Richard, Sean, Hovanes, et al.,
First let me apologize for my mistake in attribution in the minutes.
Richard checked in the changes to have HDGeant get the bunch frequency
from the CCDB, not Paul. Thanks to him for doing that. I will amend the
minutes presently.
As far as what the frequency actually is now, yesterday Paul said that
he had just come from a "master oscillator meeting" and that we are
running at 2 ns bunch spacing. I have the utmost respect for both Paul
and Hovanes, but they can't both be right here. ;-)
-- Mark
On 04/30/2015 11:32 AM, Sean Dobbs wrote:
> Thanks, Hovanes, for clearing this up, and sorry for the confusion. I
> will update CCDB accordingly.
>
> ---Sean
> On Thu, Apr 30, 2015 at 9:48 AM Richard Jones
> <richard.t.jones at uconn.edu <mailto:richard.t.jones at uconn.edu>> wrote:
>
> Hovanes,
>
> That is what I thought. Thank you for the clarification, Hovanes.
>
> -Richard Jones
> On Thu, Apr 30, 2015 at 10:38 AM, Hovanes Egiyan
> <hovanes.egiyan at gmail.com <mailto:hovanes.egiyan at gmail.com>> wrote:
>
> Hi Sean,
> MO signal that we have is at ~499MHz (and it will be prescaled
> before arriving to TDCs to much lower frequency),
> but the beam bunches themselves should now arrive to Hall D
> and the tagger hall at ~249MHz frequency.
> Hovanes.
>
>
> On 04/30/2015 09:53 AM, Sean Dobbs wrote:
>
>> Hi Richard,
>>
>> Are you using the latest version of the CCDB constants? I
>> updated the rf_period yesterday based on the results of a
>> meeting Paul Mattione had on the MO.
>>
>> I see the following results:
>>
>> farm1401> ccdb dump /PHOTON_BEAM/RF/rf_period:2933
>> #Spring running is at ~2ns period
>> 2.004008
>>
>> From HDGeant: (Run 2933)
>>
>> settofg: beam_bucket_period_ns set to 2.0040081
>>
>>
>> ---Sean
>>
>>
>> On Thu, Apr 30, 2015 at 8:44 AM Richard Jones
>> <richard.t.jones at uconn.edu
>> <mailto:richard.t.jones at uconn.edu>> wrote:
>>
>> Hello Mark,
>>
>> From the minutes, "
>>
>> * *HDGeant now uses RF period in CCDB*. Paul checked in
>> a change such that HDGeant will look up the bunch
>> frequency from the CCDB when simulating
>> electromagnetic background. The current setting in
>> the database is 499 MHz.
>>
>> I am not sure which change that refers to, but yesterday
>> I checked in a change to HDGeant that fits this
>> description. The current setting in the database is close
>> to 250 MHz, not 500 MHz. This is what I see when I run
>> hdgeant with a RUNNO set to a number in the current
>> range, eg 2933:
>>
>> settofg: beam_bucket_period_ns set to 4.0080161
>>
>>
>> -Richard Jones
>>
>> On Wed, Apr 29, 2015 at 4:30 PM, Mark Ito <marki at jlab.org
>> <mailto:marki at jlab.org>> wrote:
>>
>> Folks,
>>
>> Please find the minutes below and at
>>
>> https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_29,_2015
>>
>> -- Mark
>> _________________________________________________
>>
>> GlueX Offline Software Meeting
>> Minutes
>>
>> Present:
>>
>> * *CMU*: Curtis Meyer
>> * *FSU*: Aristeidis Tsaris
>> * *JLab*: Mark Ito (chair), David Lawrence, Paul
>> Mattione, Kei Moriya, Nathan Sparks, Justin
>> Stevens, Simon Taylor
>> * *NU*: Sean Dobbs
>>
>>
>> Announcements
>>
>> * *Nightly build results on web*. Mark has put the
>> summary of nightly build errors and warnings
>> <https://halldweb.jlab.org/nightly/nightly_build_errors.txt>
>> on the web. He led us through the email
>> <https://mailman.jlab.org/pipermail/halld-offline/2015-April/002015.html>
>> announcing it.
>> * *HDGeant now uses RF period in CCDB*. Paul
>> checked in a change such that HDGeant will look
>> up the bunch frequency from the CCDB when
>> simulating electromagnetic background. The
>> current setting in the database is 499 MHz.
>>
>>
>> Review of minutes from April 15
>>
>> We went over the minutes from last time
>> <https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_15,_2015#Minutes>.
>>
>>
>> David gave us an update on his Geant4 implementation.
>> He as put in the FDC and FCAL and can reconstruct
>> tracks in the FDC with resolution comparable with
>> those found with HDGeant. He ran into an issue with
>> multi-threading; a bug report has been submitted to
>> the Geant4 Collaboration.
>>
>> Offline Monitoring
>>
>> Kei reported he has run over most of the files
>> collected in the last week of data-taking. The volume
>> of data is small, it only takes a few hours to run
>> over everything.
>>
>> We then discussed doing a final run over the Fall
>> data so that people can use the data to prepare for
>> the collaboration meeting. There is a change to get
>> the setting of the F1-TDC parameters from the CCDB
>> that Justin checked in yesterday. There are also new
>> TOF timing constants that we are not taking advantage
>> of yet. In addition Lubomir also has new FDC
>> alignment numbers. For all of these reasons a re-run
>> seems desirable but time is running short to have the
>> data available in time to be useful. We agreed on a
>> launch time target at the end of the day on Friday.
>>
>> There was a bit of discussion of what data we have
>> from the current run. Most of it is in run 2931,
>> which is contained in just over 100 files and has
>> about 75 million events. Data were taken in mode 7
>> with an FCAL-BCAL trigger.
>>
>> Spring 2015 Commissioning Simulations
>>
>> Sean described the conditions
>> <https://halldweb.jlab.org/wiki/index.php/Spring_2015_Commissioning_Simulations>
>> he is proposing and solicited feedback. The software
>> has been tagged but not released. Paul noted that the
>> nominal position of the coherent peak is 3.4 GeV. The
>> gxproj4 account will be used to run the jobs.
>>
>> On a side note, Mark has put in a request to the
>> Computer Center for a gxproj5
>> <https://halldweb.jlab.org/wiki/index.php/GlueX-related_shared_accounts_on_the_JLab_CUE>
>> account.
>>
>> Retrieved from
>> "https://halldweb.jlab.org/wiki/index.php?title=GlueX_Offline_Meeting,_April_29,_2015&oldid=66573"
>>
>>
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