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

[Mark M. Ito]

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