[Halld-jlab] Hall D Staff Meeting Notes, November 7, 2011

[Mark M. Ito]

Folks,

Find the notes at 
https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_November_7,_2011 
and below.

-- Mark
_____

Private:Hall D Staff Meeting, November 7, 2011

Present: Fernando Barbosa, Eugene Chudakov (chair), Cody Dickover,
Hovanes Egiyan, Mark Ito, David Lawrence, John Leckey, Lubomir
Pentchev, Yi Qiang, Dmitry Romanov, Elton Smith, Sascha Somov, Vladimir
Tarasov, Simon Taylor, Ivan Tolstukhin, Tim Whitlatch, Elliott Wolin,
Glenn Young, Beni Zihlmann

Announcements, Eugene

* Lehman review was favorable for Hall D
+ we are ahead of the other Halls, for now
* spending at a rate of 1 M$/month
* potential problems
+ electronics, other things not ordered
+ online tasks are behind
o priorities need to be set
o identify stuff we need for testing
# detector testing
# solenoid commissioning
* last thursday walk through of remaining buildings
+ Hall D had been walked through already
+ service building, houses
o tagger power supply
o lcw plant
+ counting house
+ cryo plant
+ note: conduit from hall to counting house, pulling cables may
not be easy
+ things called out:
o halld and counting house not properly connected,
expansion joints needed
o cryo plant not insulated from elements
o should be ready in about a month, 1st of december
* access for personnel to on-site buildings
+ construction site right now
+ during work in hall same requirements may apply
+ everyone should get steel toe shoes
+ to get to site need RW-I, ODH training
* open house, David
+ 1-4 pm, Dec. 2
+ posters, Hall D staff as guides
+ anyone who has access to the site can come
* town hall meeting
+ future plans of the lab
+ suggestions solicited for physics division ideas
* computers
+ desktop machines have been purchased
+ Rachel Harris will make a web page with list of what is
available
* budget
+ no news yet
+ most likely will get a cut for 12 GeV
+ direction: buy as usual before January

Electronics, Fernando

* full layer of FDC to be instrumented with pre-amps for checking
with oscilloscope
* flash125: meeting with Gerard Visser tomorrow
* F1tdc: go out for prototypes before Christmas
* flash125: hopefully the same
* flash250: 4 companies selected, pricing submitted
* a lot of vacation to burn
* start counter, pair spectrometer: work to do
* SiPM electronics: 2 PC boards should be OK; 1 more to look at
+ read-out, 16 channels, replicating needs to be done
+ Jack iterated on bias control, email from him just now, work
in progress

Engineering, Tim

* tagger magnet steel has been poured, 4 billets, going for annealing
+ permeability testing being set-up
+ mold for coils for tagger made
+ Oct. 30 milestones nearing completion
* upstream platform
+ vendor arrived today
+ will start erecting tomorrow
* civil construction continues
* additional platforms
* tagger vacuum box
* pair spectrometer magnet: two pieces of rectangular steel will be
bolted on, defined, need drawings
+ two different vacuum chambers being considered, working with
Sascha, Giles writing power supply specification based on
Accelerator Division example
* tests gluing light-guides to BCAL modules: some good success
+ Regina is shipping Bcal slices, can be used for gluing tests
* mock-up of CDC, FDC, several sections of cables on it
+ will fool around with sliding cables around
* beam-line vacuum in collimator cave being welded up

BCAL Read-Out, David

* developing solid evidence for need of adding layer for
segmentation, from 3-3-4 to 1-2-3-4
* several approaches
* trouble getting quantitative numbers for the case
* improvements for timing of EM shower seen
* improvements for cluster finding harder to quantify
* neutron efficiency improvement being studied
* full draft by next week, hopefully

FDC, Lubomir

* work has stopped, power down at Blue Crab
+ power went down last week as well
* work on second package started
* first package: noise on top cell shows similar noise problem as
seen before
* bubblers discussed with collaborators
+ experience: bad bubbler was tried, when flow increased stopped
bubbling, pressure in chamber increased
+ when bubbler replaced problem not seen
* planning move of 1st package: holding brackets are attached, need
pre-amps to attach cooling tubes to one layer
+ what about other five layers?
+ need to remove holding brackets to attache pre-amps

CDC, Beni

* CMU stringing about 60 wires a day
+ 3 mos behind, perhaps may make up a month with stringing
* next: swiss cheese, cabling, actual schedule uncertain
* CDC delivery was put as late as possible
* date arranged with Paul Eugenio for a visit to FSU to look at TOF
+ week of 29th of Nov.
* stand for fdc testing
+ waiting for translator board
+ waiting for 5 last TDC's
+ other than that, everything in hand

Calorimetry, New Solenoid, Elton

* mechanical pieces coming in
* received all SiPM's that are coming to JLab
+ rest go to Santa Maria, should have arrived last week, but
probably 1st week of December
* need to prepare readiness review, Dec 15 tentatively
* will ship 30 more SiPM's from first-article shipment so that they
can set up test set-up
* working on RFP for spare solenoid
+ have that out to procurement before Ettore Salpietro's 3-month
getaway in Dec.
+ Richard Getz is working on drawings
+ want to wind the coils the easy way, not the hard way

FCAL Test, John, Sascha

* John: Matt Shepherd will come down with prototype FCAL module, 5x5
array with 3x3 in trigger, coming this week
+ tests over weekend with cosmics generally successful
* Sascha: VXS crate in F117, TID, SD boards, three flashes, allow for
realistic timing, distribution of signals on backplane, add two
more to working one today
* in touch with Hall B to coordinate location of electronics and data
acquisition configuration
* another VXS crate for F117 for timing: Linux controller, TID board,
CAEN 25-ps TDC, DAQ is working
* prototype for pair spectrometer, drawings being made, using plastic
tiles for detector

Pixel Recovery Time Tests, Ivan

* gave talk at last SiPM meeting, showed results
* checked with different delays, now get 17 ns for 50 μm, 8.5 ns for
25 μm
* pixel recovery time consistent with Hamamatsu prediction
* working on rate dependence measurement
+ saw decreasing of amplitude of signal
+ from 1 MHz to 10 MHz goes down by 50%
+ Fernando: response of LED, convolved with SiPM (or PMT),
pre-amp
o PMT response peaks
o SiPM rolls off at high frequency
+ laser should be here by end of month, OSP will be needed,
interlocks needed, training needed, entrance to room will be
restricted

SiPM Testing, Yi

* testing of SiPM's, about ready, could start testing soon
* samples look good so far
* database for results in use already
* once all of the hardware in, can start
* Fernando: a week to get boards, one week for procurement, week for
assembly, 3 or 4 weeks

Electronics, Cody

* pre-amp stuff: want to transition from manual test to test stand
next week
* translator boards: have parts and boards, sending out for assembly

Online, Elliott

* FDC tests with electronics, nothing needs to be ordered or made
* Coda 3 by Thanksgiving
* equipment goes to EEL 126 when Beni gets back
* network equipment has been ordered
+ installation being planned
* Midas e-log will be available soon
* conditions database a hot topic
* Walt Akers will design counting room furniture and control room
* solenoid controls re-design on-going
* Mark Stevens wants to order more test equipment

EPICS, Hovanes

* Nerses Gevorgyan working on discriminator interface to EPICS
* working on archiver for EPICS
+ comes with CSS
+ set-up needed
+ plan: use with FCAL test for HV
* working on alarm handler
+ also try to get it to work with FCAL test
* all network equipment ordered
+ infiniband to be ordered later
* purchase of big online computers and raid disk and file server,
put-off until FY13

Calibration Database, Dmitry

* tested
* β version releaseed
* testers solicited

Tracking, Cyprus, Simon

* long-running events fixed, problem with start counter
* conference: Cyprus, Euro-centric, EM interactions, formerly held on
Santorini, general conference
+ DVCS, parity violation, etc.
+ all plenary talks
+ some participation from JLab
+ nothing from COMPASS on π1600
+ ELSA, MAMI reports
+ every two years, in Cyprus again next time
+ a lot of student participation, poster session active

Closing Announcements

Beni: Tim put new web-cam pictures on group disk, Beni has been made a
movie from them

Elliott: networking out to counting house now, available on a temporary
basis, regular stuff in Jan

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