[Halld-offline] Offline Software Meeting Minutes, June 11, 2014

[Richard Jones]

Mark and all,

Sequence should be:

   1. pion stops
   2. if negative pion, captures on an atom, spirals in to s-shell,
   emitting X-rays below Geant cutoff
   3. if positive pion, undergoes elastic collisions with nuclei
   4. pion absorbs on nucleus and blasts out nucleons

The time scale for this is a few ns.  Which part of this is mysterious?

-Richard Jones



On Thu, Jun 12, 2014 at 3:24 PM, Mark Ito <marki at jlab.org> wrote:

> Folks,
>
> Find the minutes below and at
>
> https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_June_11,_2014#Minutes
> .
>
>    -- Mark
> ________________________________________________
>
> GlueX Offline Meeting, June 11, 2014
> Minutes
>
>       * CMU: Will Levine, Paul Mattione, Curtis Meyer
>       * FSU: Aristeidis Tsaris
>       * IU: Kei Moriya
>       * JLab: Mark Ito (chair), David Lawrence, Simon Taylor
>       * MIT: Justin Stevens
>       * NU Sean Dobbs
>       * UofR: Tegan Beattie, Zisis Papandreou
>
> Announcements
>
>       * A minor-version-change release of CCDB is now available, ccdb_1.01.
>         It incorporates David's recent change to treat row-wise
>         one-dimensional constants sets the same as column-wise ones.
>       * Data Challenge 2 REST file transfer from UConn to JLab is complete.
>         All files have been archived to tape. There were issues with
>         multi-stream transfers with the SRM, so only single stream was used
>         throughout. The suspicion is that the problem is due to small file
>         sizes. Transfers from Northwestern are next. The Computer Center
>         has opened up the requisite ports.
>       * Zisis commented on the state of the software getting-started
>         documentation on the wiki. We all acknowledged that this is
>         problem. In particular he pointed out that new students' progress
>         is impeded by a lack of clear direction in installing the GlueX
>         software. This must be advanced in priority by this group.
>
> Review of Minutes from the Last Meeting
>
>     We went over the [24]minutes from the May 28th meeting.
>       * Simon has changed the code to get the parameter for the minimum
>         number of hits on a track candidate from a JANA configuration
>         parameter. Formerly it was hard-wired at 6.
>       * Curtis reminded us that we would like to have some kind track
>         quality information, other than chi-squared, for example the number
>         of "missing" hits, included in the REST output.
>
> Specifying Alternate Versions of Calibration Constants in JANA
>
>     Mark led the group through [25]his wiki page, based on an email from
>     Dmitry. At the last meeting Justin had asked for guidance on this
>     subject.
>
> CCDB Schema Changes in Version 1.00
>
>     We looked at another of Mark's [26]wiki pages, describing the
>     relationship between database schema versions and software version.
>     Again the presentation was based on an email from Dmitry.
>
> Reconstruction of EVIO Data
>
>     David brought us up-to-date on the status of doing reconstruction with
>     EVIO data derived from simulation output. See his [27]his slides for
>     details. Topics covered:
>       * EVIO vs. HDDM
>       * Converting HDDM to EVIO
>       * Translation tables
>       * Configuration parameters for the rawevent plugin
>       * Reading EVIO data into DANA
>       * Configuration Parameters for the DAQ plugin
>       * Still to do
>
>     We are very close to having a functional system to go from simulated
>     HDDM to EVIO to reconstruction. The only piece missing now is EVIO data
>     as it will appear from the CAEN TDCs.
>
> BCAL Truth
>
>     Will explained in more detail the mystery he sees in the [28]simulation
>     output (scroll down to the attachment) that is likely responsible for a
>     late tail in the BCAL time distributions for pions. He sees a pion
>     interact in the BCAL and
>
>       3.5 ns after the pion dies, in the exact same location as the pion
>       death, a proton is "born". In addition to this proton, 3 other
>       protons, 1 neutron, and 1 pion are also "born" at the exact same
>       moment and location.
>
>     We did not come up with an explanation for this. Zisis noted that the
>     output looks like it comes from GEISHA. Irina Semenova may be able to
>     help us with this; Zisis will ask her about it.
>
> References
>
>    24.
>
> https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_May_28,_2014#Minutes
>    25.
>
> https://halldweb1.jlab.org/wiki/index.php/Specifying_Alternate_Versions_of_Calibration_Constants_in_JANA
>    26.
>
> https://halldweb1.jlab.org/wiki/index.php/CCDB_Schema_Changes_in_Version_1.00
>    27.
> https://halldweb1.jlab.org/wiki/images/d/d6/20140611_EVIO_in_DANA.pdf
>    28.
> https://mailman.jlab.org/pipermail/halld-offline/2014-May/001681.html
>
> --
> Mark M. Ito, Jefferson Lab, marki at jlab.org, (757)269-5295
>
> _______________________________________________
> Halld-offline mailing list
> Halld-offline at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-offline
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halld-offline/attachments/20140613/cfe31c1f/attachment-0002.html>