[Halld-jlab] Hall D Staff Meeting Notes, July 15, 2013

[Mark M. Ito]

Correction: URL = 
https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_July_15,_2013

On 07/15/2013 07:57 PM, Mark M. Ito wrote:
> People,
>
> Find the notes at
> https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_July_15,_2013#Mark.2C_David.2C_Analysis_Workshop
> and below.
>
> -- Mark
> _____________________________________________
>
> Private:Hall D Staff Meeting, July 15, 2013
>
> Present: Fernando Barbosa, Eugene Chudakov (chair), Mark Dalton, Nerses
> Gevorgyan, Mark Ito, Sergey Kuleshov, David Lawrence, Bert Manzlak,
> Sergey Pozdniakov, Yi Qiang, Elton Smith, Sascha Somov, Simon Taylor,
> Elliott Wolin
>
> We welcomed Mark D. to his first Hall D Staff meeting.
>
> Bert, Safety
>
> 1. For June no recordable incidents, good thing since a lot of work
> going on around lab.
> + Still we are encouraged to contact Medical Services if
> something does happen.
> 2. Anyone with lock-out-tag-out training needs to take mandatory
> refresher course. Next one is tomorrow at 9 am.
> 3. SAF810kd required for access to site. Necessary because of changes
> to the General Access Radiological Work Permit.
>
> Elton mentioned new procedure for registering guests for tours that
> require dosimetry. System works well. For us this applies to the tagger
> hall and the ESB.
>
> Eugene, Magnet Status
>
> * Cryo group started cooling last week, several dewars used, quick
> changes were being done.
> * Refrigerator clogged in about half the expected amount of time,
> cleaning started today.
> * Jonathan Creel is ill. We are all hoping for a speedy recovery.
> Impact on schedule not clear.
> * We need to think carefully about the maximum current for the
> upcoming test. It may turn out that the value may set an upper
> limit on operations.
>
> Past history:
> Pressure (atm) Current (A) Comment
> 1.292 1500 no incident, requires additional dewar
> 1.348 1460 quench
> * If we want to operate at 1350 A, will need to test 1355.
> * Recently we were told that it if a quench starts, even at a level
> below detection threshold, the whole magnet will likely quench
> before the current can be ramped down.
> * We will ramp at 0.2 A/s at low current, slow to 0.12 A/s, and go
> down to 0.06 A/s above 1300 A.
> * Reviewers advocate limit at 1300 A at the "quench" pressure
> * Possible proposal to maintain margin in terms of pressure with
> respect to the quench pressure, rather than a ceiling on the
> current.
> * ground fault interrupter and shorts to ground
> + We know of short of 16 Ω to ground
> + If there are two shorts, then when current ramps a lot of
> current could go through conductor between the two shorts.
> + May have to check for this.
>
> Mark, David, Analysis Workshop
>
> * Paul Mattione has developed analysis tools to aid in finding all
> particle combinations consistent with a chosen final states via
> configuration in the code rather than having the user loop over
> particles.
> + Kinematic fits can be applied
> + Particle ID cuts can be applied
> * A standard ROOT tree can be generated from these combinations.
> * The tools for doing boosted decision trees (BDT) were presented.
> * The AmpTools packages was described and example of its use were
> shown.
> * These tools show great promise in speeding up development of
> analysis code.
> * For more information, see the [17]Workshop wiki page.
>
> Fernando, Electronics
>
> * got lots of help from the students, cable bundling and labeling
> done now
> + Students from CUA worked on the BCAL, they have gone back
> + CMU students left last week
> + Other students remain, working on BCAL readout
> * getting ready to move crates to Hall for FCAL
> * had meeting with Tom on installation of electric power
> + power in Hall by mid-August
> + Elliott: network installation starts in Fall
> * FADC-250 crates tested
> * F1-TDC and FADC-125 testing moving ahead
> * some racks are moving from Computer Room to Hall
>
> Eugene, Tracking
>
> * moving 3rd package to Blue Crab for attachment on frame, two
> packages already attached
> * worrisome case of one pre-amp connector
> + conductive glue making intermittent contact
> + solved by inserting G10 plate in slot
> + worry is that others may come loose later
> * Beni demonstrated ability to run low thresholds on the strips with
> good efficiency
>
> Elton, Eugene, Calorimetry
>
> * Elton on BCAL
> + 47th module glued
> + replacement light guides received, enough for finishing 48th
> + not enough for 49th
> + Sergey K.: UTSM has problem with CNC machine, may delay
> replacement light guides
> + checking modules, detachments not seen
> + Fernando: 98 read-out board needed, 60 assembled, now
> installing SiPMs on cooling plates, all done by end of August
> * Eugene on FCAL
> + installing dark box
> + Regina students will help w/ cabling
>
> Elliott, David, Online
>
> * getting ready for online data challenge
> + fake event builder
> + feed to ET
> + monitoring farm looking at events
> + fake event recorder
> * good progress on inventory system from Sergey P.
>
> Retrieved from
> "https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_July_15,_2013"
>
> References
>
> 17. https://halldweb1.jlab.org/wiki/index.php/GlueX_Analysis_Workshop_2013
>


-- 
Mark M. Ito, Jefferson Lab, marki at jlab.org, (757)269-5295