Hi Mike,
A possible LBNL LDRD is an interesting development. Who is the
lead on
this at LBNL, Leo Greiner, Peter Jacobs..? Do you know if the
scope
of the LDRD is to be Si vertex mech engineering, ladder design,
support structure?
Is there any electronics component to the LDRD. Thanks.
Ed
On 3/7/2016 10:05 PM, Michael P.
McCumber wrote:
Hello all,
Yes, my trip to LBL generated some interest and one plan that
resulted is to submit for Berkeley lab funding to perform
sPHENIX engineering R&D. My understanding is those funds are
at the few times 100k per year level and of course are released
in competition with other proposals.
In other good news our first MAPS prototype board has
arrived at LAN---huzzah. Here is a pic (I'm just returning
from WWND so haven't seen it myself yet):
Mike
--
Michael P. McCumber, PhD
Los Alamos National Laboratory
505-709-8161
On Mon, Mar 7, 2016 at 9:03 PM,
Frawley, Anthony <afrawley AT fsu.edu> wrote:
Hi Ed,
"LBL has an LDRD funding request to do sPHENIX
engineering. Engineering and CFC R&D.
This would be additional to a small request for
Walt's time in Mike's LDRD."
It really was LBL that was intended, and yes CFC
means carbon fiber composite.
Mike has two LDRD requests, the big one and a
smaller, rather limited, one that is a backup.
Cheers
Tony
From:
sphenix-tracking-l-bounces AT lists.bnl.gov
<sphenix-tracking-l-bounces AT lists.bnl.gov>
on behalf of EdwardOBrien < eobrien AT bnl.gov>
Sent: Monday, March 7, 2016 5:52 PM
To: sphenix-tracking-l AT lists.bnl.gov
Subject: Re: [Sphenix-tracking-l] Minutes
of February 26, 2016 tracking meeting
Hi Tony,
I have a couple of question about something
in the minutes of the Tracking meeting
from Feb 26. You wrote:
"LBL has an LDRD funding request to do
sPHENIX engineering. Engineering and CFC
R&D.
This would be additional to a small request
for Walt's time in Mike's LDRD."
Should this be "LANL has an LDRD funding to
do sPHENIX engineering..."
Does CFC mean carbon fiber composite?
Also the way the third sentence is written
suggests that there are two LANL LDRDs
but I believe that there is only one.
Correct?
Thanks.
Ed
On 2/26/2016 1:57 PM, Frawley, Anthony
wrote:
Hi All,
In addition to reports on progress with
tracking detectors, we had a discussion
with Gunther Roland. I have placed that
first in the minutes because it should be
of interest to the collaboration in
general, particularly the discussion about
physics topical groups.
Cheers
Tony
Gunther Roland - Some
news/thoughts/questions:
--------------------------------------------------------------------
We had a long discussion about how to move
forward quickly with characterizing the
performance of the tracking options for the
key physics topics.
The conclusions were:
We need three money plots that demonstrate
our capability to do critical physics. The
number should be as small as possible:
Jet substructure performance
B-jet performance
Upsilon(2S) / Upsilon(1S) ratio as a
function of centrality
We should form topical groups focused on
these three physics topics who will develop
the analysis tools using simulated data.
The topical group manpower should feed back
into helping develop detector simulations
tools as needed to study the physics
performance.
The output from these topical groups will
provide the information we need for
evaluating detector options.
The topical groups should have a leader and
have regular meetings.
Dave and Gunther will follow through on
forming the topical groups.
They will ask for reports from the topical
groups at the collaboration meeting.
Since many of the institutions are new to
sPHENIX, we need to schedule tutorials to
help people get plugged into how to run the
software efficiently.
It was noted that there are some groups that
have already started exploring detector
performance effects on physics, but we need
to expand the manpower as much as possible,
if we are to do a good job of evaluating the
physics implications of the tracking design
in time to make the decisions we need to
make.
Mike suggested a tracking-wide workshop at
the end of the summer, before the beginning
of classes. Everyone thought this was a good
idea.
Is there a plan for a TPC workshop similar
to the silicon workshop in Santa Fe in
March?. Tom: Not currently. We already have
broad inroads because it is an extension of
ILC development. But it is a good idea. June
would work best for Tom.
Gunther suggested that SPHENIX start a
bi-weekly meeting to keep people informed of
what is going on in the collaboration. It
was agreed that this was a good idea.
Rachid - Reused pixel configuration
progress:
-------------------------------------------------------------
The tracking outer radius is now fixed at
(80 cm - 2 cm stay-clear) = 78 cm.
Layer p0: Added cooling, CFC, .... now
nothing is missing.
Found that the 12 ladder geometry at 2.4 cm
radius has overlaps.
Changed the tilt and increased the radius to
2.49 cm, increased to 13 ladders , now
everything fits.
Slides 12 and 13:
What is the average mass of p0? Rachid: will
get that and report back.
Rachid suggested doing G4 simulation of the
new ladder geometry before trying to do p1.
Mike: Ladder based geometries are needed,
but will not be available soon.
We have the VTX ladder geometry in FORTRAN,
needs to be ported to G4.
Gaku volunteered to look into this. Mike
will send what he has to Gaku.
Rachid will move ahead with p1 configuration
in the meantime.
John: What are you going to do with the big
wheels? A lot of mass outside the
acceptance.
Rachid: After p1 configuration, we will move
to the extender - want to move the SPIRO
board far away, but
we have to understand how far is possible
before the performance deteriorates.
Mike McCumber - Verbal report on MAPS
progress
----------------------------------------
Last week was pre-proposal week at LANL.
Have submitted a DR large scale proposal
($1.65M/yr for 3 years, 1/3 equipment, 1/3
experimental FTE's, 1/3 theory FTE's).
Also, as a backup, an ER small proposal
(320K/yr for 3 years for R&D, software,
theory only).
Will hear back in a few weeks, when the
full proposals will be requested for the
cases that pass the cut.
Mike visited Barbara at LBL to discuss LBL
involvement.
Prototype boards are being shipped from
CERN, Barbara offered to send a student to
LANL for a week to help setup. Very good.
LBL has an LDRD funding request to do
sPHENIX engineering. Engineering and CFC
R&D.
This would be additional to a small
request for Walt's time in Mike's LDRD.
Mike talked to Ernst while at LBL, got the
ALICE ITS file for G4 - Mike showed a slide
with the ROOT TGO object from that.
Mike will port out the code for each ladder
type, and start stacking them for sPHENIX.
Barbara visited LANL and met with the LANL
Division director and ALD yeterday.
There is interest from other groups,
still at initial stages so no details.
LBL, MIT are included.
The MAPS C&S workshop (late March) -
registrations are in process. Have
registrations from the MIT hadron group.,
Fleming V. will come.....
The meeting will be in downtown Santa Fe,
the hotel will be chosen in the next few
days.
Mike is trying to get some C&S
details from Luciano Musa prior to the
meeting, to help with organizing breakout
sessions.
Mike posted slides last week where he
dropped from 7 layers to 6 layers in the
MAPS tracker. There was no significant
increase in fakes, it looked fine.
He removed the 5th layer (24.5 cm). Will
work more on this. Want to fully explore how
much the surface area (and cost) can be
reduced.
Tom: Were you asking the reconstruction to
do 6 layers out of 6? Yes.
Mike talked to Leo Greiner. They are
working on latchup issues. The STAR HFT
runs wih 1% loss due to resets to prevent
latchup.
The ALCIDE chip should overcome this, but
that is not demonstrated yet, so Mike will
add 1% inefficiency per layer to the sims.
Gunther: is this a ladder geometry or
cylinder geometry? Mike: Cylinder. The
realistic geometry needs tracking changes -
the big item is a full Kalman that can
handle complicated patterns of hits. Haiwang
is working on setting that up.
Tom Hemmick - TPC progress report
-------------------------------------------------
Tom made a detailed report on the progress
towards making mechanical decisions for the
TPC field cage and end plate.
Tom: Question for JH and Ed: We will have
final mandrel drawings in a few days to send
to shop. Is there a standard mechanism for
including drawings in an sPHENIX repository?
John: Rich Ruggiero et. al. have their own
internal system. Eventually they are
intended to be archived at CAD. Send them to
Rich. Also add to DocDB (sp?) as backup. Ed:
make sure to maintain version control.
Ed: Stony Brook shops can manufacture the
endplates? Yes.
Ed: We have made some progress on finding an
engineer to verify the finite element
analysis, working vigorously on it.
Itaru Nakagawa - Silicon strips progress
report
--------------------------------------------------------------
Tom: Is the increase in dark current
expected after grinding? Yes.
John: Does radiation damage hurt thinner
detectors more? Rachid, the signal to
noise will drop from about 20 to about 15
for the thinner detectors.
Still need to check that the FPX chip is
not saturated.
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