Forward Upgrade
Meeting
Richard Seto-UCR
BNL
Aug 18-19, 2004
Bridgeline x8383
rooms: 3-192/2-160/2-78/2-187
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Status
Previous Meetings
usual Monday meetings
Had presentation to EC/DC (early May)
meeting at LANL (June 21-23)
EC/DC/PM letter is on its way to us
Funding
NSF proposal due in Jan (late Nov)
Scope?
Riken Funding-physics argument?
Design
Mu trigger – 2 options – RPC and Cathode readout
Not mutually exclusive
NCC – overall scheme chosen – details now
Simulations – Geant work beginning for NCC, Specific
trigger and physics studies being done
More Collaborators [many possible – Bejing, Trieste,
Prauge, ….]
Responsibilities? 2
Goals for this meeting
Where are we
Muon trigger technology going, and why
am I in this
Muon trigger funding handbasket?"
we must decide!
the NSF proposal (jan!!)
we must decide!
R and D plans and requests
steps toward CDR (s)
Apr 2005 ?? Agenda
Next major meeting?
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Agenda – Day 1 (9AM 3-192)
Overview -rich -20 min
EC/DC letter-discussion - rich 20 Case II - case for the RPC's -
Matthias - 45 min
min
Discussion – Muon trig solution
Muon Trigger 30 min
Physics motivation for Muon Lunch 1:00
Trigger and performance
requirements- Naohito - 30 min Afternoon 2-160 2:00
Muon Trigger Studies: Funding the muon trigger
Performance Issues -Wei 20 min Overview of Costs for Muon
Muon trigger and Pattern trigger – Matthias/Naohito 30 min
recognition - Vince - 20 min R and D request
break 10:45 Discussion - Funding
Case I - Using the Cathodes possibilities
Hideto/Matthias/Naohito 45 min
R&D studies in Kyoto - Naohito-
10 min Using the muon trigger+NCC in
Rejection Power of LVL-1 MuTr
Spin Studies -Astrid 20 min
with fast cathode readout- Break 4:30
Kazuya Aoki - 30 min Measuring the Spin structure
Pulse shape analysis of function and orbital angular
Cathode signal from MuTr momentum Ken - 30 min
Chambers- Kohei Shoji - 20 mins
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Agenda – Day 2 (9AM 2-78)
CMS Muon Trigger RPCs- Yajun Aug 19th Afternoon 2-187 2PM
Mao- 20 min Guest speaker – the Hera-B
NCC calorimeter - 20 min
Review of NCC physics and studies Scope and Planning for NSF
done so far - rich 30 min proposal Ken 20 min
NCC - update on costs and design john hill- updat from ISU - 10 min
Ed Kist - 45 min discussion : the NSF proposal (45
R and D request
min)
Break 10:45
Break 4:30
NCC studies-Vassily - 45 min
Disscussion and planning- toward
Status for Foreign Collaborators the CDR(s):
Matthias, Ed Kinney - 20 min Charting the future for the NCC -
Trigger Electronics for mu-trig+NCC Edward Kistinev, Rich
-John L 30 min Charting the future for the muon
Integration Issues - Ed Kist - 30 min trigger - matthias/Naohito
Lunch 1:00 Close-out – Rich
END: 6PM
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EC/DC/PM letter – reader’s digest version
We got the green light
2 CDR’s
Work with forward Si (LANL), consider the GEM proposal too
Muon trigger
look at possible benefits of displaced vertex measurements
Make sure it can trigger at RHIC 2 heavy ions
Make sure it solves the pattern recognition problem
Choose a technology
be ready by FY 07
NCC
look at combined charged tracking and calorimeter
measurements- optimize design
Make sure it can take high occupancies
Find money!
Consider Hera B Calorimeter
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NSAC Subcommittee Review of US Heavy Ion Physics
Program (the “Barnes Committee”)
$$$$$$
$$$$$$ Iraq
Congress
your taxes
Pres of USA
$$$$$
OMB dams
$$$$$$$$$$$ roads
$$
NSF?
$$$$ DOE the arts
Office of Science medicine
$$$$$$
Japan?
Europe? DOE Nuclear
$$ (Kovar) NSAC
$$$
$$
$ $
Barnes Committee
upgrades
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Recommendations: Reader’s Digest
Recommendation 1 – Heavy Ions
run RHIC as much as possible
near-term detector upgrades of PHENIX and STAR
accelerator and detector R&D
EBIS
Recommendation 2 - Spin
Run polarized proton : gluon polarization
Accelerator and detector upgrades
flavor dependence of sea polarization from W-
asymmetry
Recommendation 3 - LHC
comparable investment priority with the near-term
upgrades 8
Recommendation 4 – Constant “effort”
Reduce RHIC running substantially.
Defer or stretch out detector upgrades
Very limited LHC heavy-ion program
PHOBOS and BRAHMS phased out earlier
BUT Invest in
STAR TOF and PHENIX Silicon Vertex Barrel.
RHIC accelerator and detector R&D.
Construction of EBIS.
Some participation in the LHC heavy-ion program.
Support at the present level for university and national laboratory
Recommendation 5 – Increase $$$
5% increase for RHIC running time.
another 5% increment for
RHIC detector upgrades.
LHC heavy-ion physics program.
Experimental and theoretical research in heavy-ion physics.
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Spares
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EC/DC/PM letter
I’m pleased to inform you that the review of your letter of
intent for upgrades to extend the forward physics capabilities
of PHENIX was reviewed very positively in a joint meeting of
the PHENIX detector council (DC) and executive council
(EC). Based on their advice PHENIX project management
wants to encourage you to move forward towards the
development of two conceptual design reports (CDR), one for
an upgraded muon trigger system and a second independent
CDR for a forward calorimeter (NCC).
The proposed upgrade of the first level muon trigger with
momentum resolution is critical for the planned W-
measurement in polarized proton collisions at 500 GeV. The
addition of a forward electromagnetic calorimeter will large
enhance the PHENIX physics program by adding electron
and photon measurement capabilities over a large
acceptance combine with jet detection.
As a result of the review a number of issues and concerns
have been identified which result in a list of action items and
recommendations in three areas: 11
1. Two verses one project:
The upgraded muon trigger and the electromagnetic calorimeter have been
presented together in one LOI and both projects have been developed in close
collaboration. PHENIX project management strongly encourages to keep up
this close collaboration. However, PM also recognizes that the two components
will be separate PHENIX subsystems with separate representation in the DC,
they will likely be funded through separate sources, and will develop on
independent time scales. Therefore independent CDR’s should be developed.
2. Interplay of PHENIX forward detector upgrades:
At present the PHENIX upgrade plans foresee 3 new detector components in
forward direction. The muon trigger upgrade and the NCC, presented in the
letter of intent, and a forward silicon vertex tracker which has been presented
and endorsed at an earlier time. In order to optimize the physics performance
for forward physics the interrelation of these detectors should be studied and
the results should be reflected in the CDR’s for all three future subsystems.
In particular, the present close collaboration of the groups working on the muon
trigger and the NCC should be extended to include also the forward silicon
detector.
Concerning the muon trigger, possible benefits of the trigger system from
displaced vertex measurements used to veto muons from pion or kaon decays
should be investigated.
The physics potential of the combined charged tracking and calorimeter
measurements should be studied. Based on these results the requirements for
both systems should be review and adapted if necessary.
Resent discussions of adding GEM tracking stations around the interaction
point should also be considered 12
3. Issues specific to the muon trigger upgrade:
The muon trigger upgrade, though primarily proposed to
improve the single muon trigger for W-physics, should also
improve the muon trigger for heavy ion running to a level that it
provides the necessary rejection for heavy ion running with
RHIC II luminosities. In addition, new muon trigger detectors
should also help to solve any remaining pattern recognition
problems of the muon tracking. At the time of the presentation
neither the requirements for heavy ion triggering nor the
performance of the muon tracking were clearly established.
Both issues need to be addressed as soon as possible to settle
the performance requirements for the new trigger detectors.
Many options for hardware solutions have been presented.
Once the requirements are fully established the group should
present a path how to establish a technology choice.
Because of the importance of the muon trigger upgrade for pp
running at 500 GeV and expected overall improvement of the
muon triggering and tracking, PM suggest to pursue this project
on an aggressive time scale. Ideally the system should be in
place for the runs in FY07/FY08 when the next large Au-Au and
the first large pp run at 500 GeV are expected.
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4. Forward calorimeter specific related issues:
The review committee was impressed by the large number of
new physics measurements possible with the NCC. This
technologically challenging device will add significant new
physics potential to PHENIX. Concerns were raised about
the performance of the device in the high occupancy
environment of heavy ion collisions. A more thorough
investigation of its capabilities in central Au-Au collisions
should be performed.
Because of the tight budget situation for any proposed RHIC
upgrades an the large number of projects already being
proposed to BNL and DOE it is unlikely that the NCC can be
build with DOE funding on the proposed time scale before
the run in FY08. We encourage the collaboration to continue
the successful recruiting of new groups and to seek funding
sources outside of the US to realize this project.
Recently another option, namely an electromagnetic
calorimeter from H1 (?), has been discussed as possible
alternative. Benefits and draw backs of this alternative device
in terms of physics performance, cost and schedule should
be investigated.
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Recommendation #1 – Heavy Ions
A new and complex form of dense QCD matter has been
discovered at RHIC. To investigate and understand the
properties of this matter, we recommend full exploitation of
the existing RHIC facility and investment in future research
tools. The flexibility of this dedicated collider, coupled with
detector and luminosity upgrades, sustains RHIC's unique
discovery potential. RHIC should run for as many weeks per
year as possible, compatible with the following:
Invest in near-term detector upgrades of the two large experiments,
PHENIX and STAR, to take full advantage of the existing accelerator
capabilities.
Invest now in accelerator and detector R&D, in preparation for RHIC II to
enable crucial measurements of this new form of dense matter using
rare probes.
Construct EBIS as quickly as possible to improve the reliability and
increase the capabilities of the heavy-ion injection system and to realize
the projected reduction in RHIC operating cost.
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Recommendation 2 - Spin
In addition to its unique role in producing dense QCD
matter, RHIC is poised to become a leading hadronic
physics facility through a study of the structure of the
proton using high-energy polarized proton-proton
collisions. Its goals go well beyond current and expected
results at other facilities. In order that this program
succeed we recommend that:
Polarized proton-proton running remain an integral part of
the RHIC program; In the near term, polarized proton-
proton running time be sufficient to allow measurement of
the gluon polarization on a reasonable time scale;
Accelerator and detector improvements proceed at a rate
that allows a timely determination of the flavor dependence
of the quark antiquark sea polarization through W-
asymmetry measurements.
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Recommendation 3 - LHC
The LHC offers outstanding opportunities for new
discoveries in relativistic heavy-ion physics, driven
by a large increase in center-of-mass energy,
different initial conditions, and a larger kinematic
reach for hard probes. Parallel studies at RHIC
and LHC provide a synergy important for global
understanding of the properties and dynamics of
dense QCD matter. We recommend that:
Participation at the LHC should become a component of
the U.S. Heavy-ion program. This participation should
receive comparable investment priority with the near-term
upgrades for each of the two large RHIC detectors.
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Recommendation 4 – Pain (possibly)
The Committee finds that it is impossible to realize the compelling
scientific opportunities identified in Recommendations #1-3 within a
constant-effort budget. However, within such a budget, the long-
term scientific impact of the heavy-ion program can be best
maintained by a balanced program that includes elements from all
three recommendations. This can only be done through painful
cuts. Specifically:
RHIC running will have to be reduced substantially.
Compelling near-term RHIC detector upgrades will need to be stretched
out or deferred.
Participation in the LHC heavy-ion program can only be funded at very
limited level.
PHOBOS and BRAHMS may need to be phased out earlier than
envisioned in the BNL 20-year plan.
Even within a constant-effort budget, we recommend that certain
essential investments must be made. These include:
Construction of the STAR Time-of-Flight Barrel and the PHENIX Silicon
Vertex Barrel.
RHIC accelerator and detector R&D.
Construction of EBIS.
Participation in the LHC heavy-ion program.
Support at the present level for university and national laboratory 18
Recommendation 5 – Increase $$$
The Committee concludes that additional resources above
the constant effort level are essential to exploit outstanding
opportunities in heavy-ion and spin physics that would be
otherwise lost. The Committee considered two possible
budget increments over constant effort:
An increment of up to 5% over constant effort should be
devoted to increased RHIC running time. This should permit
operation of the RHIC accelerator at least as many weeks per
year as envisioned within the recent BNL 20-year plan.
Additional funds beyond a 5% increment should be allocated in
comparable amounts to:
RHIC detector upgrade investments to maximize the
scientific potential of RHIC in the era prior to the luminosity
upgrade.
U.S. participation within the LHC heavy-ion physics
program.
Experimental and theoretical research in heavy-ion physics.
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