Jim Brau, Prague, November 17, 2002
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Jim BrauUniv. of Oregon
November 17, 2002
American LC Physics/Detector Studies
• 2002 has been a very active year for LC physics and detector studies in North America
• Plans for invigorated R&D effort with hardware development, including LC accelerator R&D at the universities
Jim Brau, Prague, November 17, 2002
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US LC Steering Group established
• Establishment recommended by the HEPAP Subpanel on Long Range Planning.
• membership:– Dorfan (chair), Tigner, Witherell … lab directors– Brau, Oreglia … ALCPG– D. Burke (SLAC), S. Holmes (FNAL), G. Dugan(Cornell) …
machine– J. Bagger, S. Dawson … outreach– J. Friedman, Y-K. Kim, D. Marlow
CHARTER (1st paragraph)
• The U.S. Linear Collider Steering Group leads universities and national laboratories working toward U.S. participation in an international high-energy, high-luminosity, electron-positron linear collider wherever it is built and preparing elements of a bid to host the project in the U.S.
Jim Brau, Prague, November 17, 2002
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Reorganization of Physics and Detectors Working
Groups• HEPAP report inspired new energy in North American Linear
Collider effort
• Charlie Baltay and Paul Grannis stepped down after several years
of excellent leadership – Jim Brau, Mark Oreglia co-chairing ALCPG, Executive Ctte:
– Ed Blucher (Chicago) Dave Gerdes (Michigan)– Lawrence Gibbons (Cornell) Dean Karlen (Victoria)– Young-Kee Kim (Berkeley) Jeff Richman (UCSB)– Rick Van Kooten (Indiana) Hitoshi Murayama (Berkeley)
• The “old” NA WGs were reviewed • minor changes in leadership• establish LHC/LC study group (following ECFA/DESY)• liaison to accelerator R&D
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New
Working Groups
Detector and Physics Simulations: N. Graf/M. Peskin
Vertex Detector: J. Brau /N. Roe
Tracking:B. Schumm/D. Karlen/K. Riles
Particle I.D.:B. Wilson
Calorimetry:R. Frey/A. Turcot/D. Chakraborty
Muon Detector: G. Fisk
DAcq, Magnet, and Infrastructure:(inactive)
Interaction Regions, Backgrounds: T. Markiewicz/S. Hertzbach
IP Beam Instrumentation: M. Woods /E. Torrence/D. Cinabro
Higgs: R. Van Kooten/M. Carena/H. Haber
SUSY: U. Nauenberg/J. Feng /F. Paige
New Physics at the TeV Scale and Beyond:J. Hewett/D. Strom/S. Tkaczyk
Radiative Corrections (Loopverein): U. Baur/S. Dawson/D. Wackeroth
Top Physics, QCD, and Two Photon: Lynne Orr/Dave GerdesPrecision Electroweak:
Graham Wilson/Bill Marciano
gamma-gamma, e-gamma Options: Jeff Gronberg/Mayda Velasco
e-e-: Clem Heusch
LHC/LC Study Group - chaired by H. Schellman/F. Paige
Liaison to accel. R&DT. Himel, D. Finley, J. Rogers
http:blueox.uoregon.edu/~lc/alcpg
New
New
Split
Merged
Merged
Co-chairs: Jim Brau and Mark Oreglia
UCLC and LCRDD. Amidei, G. Dugan, G. Gollin, J. Jaros, A. Kronfeld, U. Mallik,R. Patterson, J. Rogers
New
Global Detector NetworkM. Hildreth/R. Van Kooten
New
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First Coordinated Study ofALCPG Working Groups
PHYSICSWhat are the value, priority, and
importance to the physics program of the LC performance options. We are considering issues such as:
initial and eventual energy reach integrated luminosity positron polarization how much is needed/useful gamma-gamma collisions electron-gamma collisions electron-electron collisions
More detailed issues energy luminosity spectrum beam bunch structure
other collider parameters
DETECTORSWhat are the impact of the
accelerator parameters on detector performance?
Investigating luminosity backgrounds beam bunch structure calibration (Z peak
running) other relevant collider
parameters
Specify priorities for R&D. Study requested by USLCSG
Draft report in November
Jim Brau, Prague, November 17, 2002
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Recent Meetings and Workshops
• Regional R&D MeetingsFermilab (Apr 5) Cornell (Apr 19) SLAC (May 31)
• LoopVerein BNL May 9-10• IP Beam Inst. SLAC June 26• ALCPG Santa Cruz June 27-
29• LCDsoft NIU Nov 7-9• collider
workshop SLAC Nov 21-22• LHC/LC Fermilab Dec 12-13• ALCPG U Tex-ArlingtonJan 9-11
(Int’l R&D reports -vxd and intmd-trk -Jan 8)
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Santa Cruz Goals
– First meeting since reorganization• 132 registrants
– 7 from Europe– 4 from Asia
Physics and Detector Working Groups had very busy program of talks and discussions
Fourth day was devoted to planning for R&D proposals (UCLC and LCRD)
Jim Brau, Prague, November 17, 2002
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IP Beam Instrumentation WG
• New working group to concentrate on IP beam instrumentation– luminosity– energy – polarization
• Workshop at SLAC, June 26th
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LCDsoft
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Workshop on Low Energy Photon Collider Facilities
November 21 -22, 2002 at SLAC
• A workshop to examine the possibility and readiness of photon collider testbed facilities and evaluate their timescale and utility for the International LC project baseline definition.
http://www-conf.slac.stanford.edu/lepcf/
Photon Collider physics at a future LC
The potential for a low energy photon collider demonstration
Detailed discussions on the requirements for a photon collider demonstration at SLC
The possibility of photon collider experiments at sub-LC energies.
Jim Brau, Prague, November 17, 2002
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Photon Collider Testbed Hardware
Tom Markiewicz
NLC - The Nex t Linear Co ll ider Projec t
Photon Collider Testbed Hardware ½ Scale prototype of optics / alignment system is currently
under construction
Beampipe
Alignment System
Jim Brau, Prague, November 17, 2002
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The LHC/LC Study Group• ECFA/DESY Study established study group
• The aim of the LHC / LC Study Group is to investigate how analyses at the LHC could profit from results obtained at a LC and vice versa. It is furthermore studied how informations obtained at both machines can most effectively be put together in order to explore the mechanism of electroweak symmetry breaking, the underlying structure of SUSY theories, etc.
• First meeting at the ECFA/DESY LC Workshop, St. Malo, 12 - 15 April, 2002
• American working group led by Heidi Schellman & Frank Paige
• First meeting in N. American: December 12-13, Fermilab
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The Growth in R&D Plans & Proposals
• In January at the Chicago Workshop: – lots of new faces– New university interest in machine development!!!
• In the following weeks:– New groups formed to tie-in with labs, educate
themselves about opportunities and areas of need, join existing effort, and create proposals
– NSF precipitated the notion of consortium proposals (modelled on the muon collider R&D)
• Three regional meetings were held – Fermilab (Apr 5), Cornell (Apr 19), SLAC (May 31)
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US R&D Proposals• Regional meetings initiated proposal preparation
for an invigorated R&D effort (UCLC and LCRD)April 5 - Fermilab April 19 - Cornell May 31 - SLAC
• A single, combined proposal was developed over the summer and sent to DOE and NSF (October 24)
A University Program of Accelerator and Detector Research for the Linear Collider
– about 2 M$ next year (increasing in out years)– very strong accelerator R&D component
• (roughly 1/2 of total funding)
• International Detector R&D Committee report provided guidance for detector projects
• http://blueox.uoregon.edu/~lc/randd.html
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Linear Collider Accelerator R&D
• Many in the American university community are interested in linear collider accelerator R&D
• In response to this, the LC accelerator physicists prepared a list of R&D projects and the community developed proposals to address some
http://www-conf.slac.stanford.edu/lcprojectlist/projectlist/intro.htm
• 31 accelerator project proposals were submitted October 24
• The US funding agencies are expected to support many of these projects
Jim Brau, Prague, November 17, 2002
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A University Program of Accelerator and Detector Research for the Linear Collider
2002 ProposalProposed
BudgetNo.
projects
Accelerator Physics $1,003,783 33Luminosity, Energy, Polarization $171,541 9Vertex Detector $119,100 3Tracking $395,662 11Calorimetry $514,540 12Muon system and Particle ID $148,899 3
TOTAL $2,353,525 71
In addition strong R&D effort continues in Canada
http://www.hep.uiuc.edu/LCRD/html_files/proposal.html
Jim Brau, Prague, November 17, 2002
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ALCPG plan for reports
• Evaluate LC machine parameters and options (mentioned earlier) - high priority - draft soon
• White paper on Physics and Detector R&D– Int’l Detector R&D report
http://blueox.uoregon.edu/~lc/randd.html– working with Int’l comm. to complete web of links to WW
efforts
• White paper on the role of the LC during the LHC era (work of the LHC/LC study group)
• Physics and Detector “design manual” - what we know about the options, tradeoffs, performance– about summer 2004?– will this be world-wide?
Plan for “design manual” still being developed
done
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Future Meetings of the ALCPG• Plans are underway for the
next two ALCPG meetings during 2003– Next winter ( January 9-11)
• U Texas-Arlington (http://alcworkshop.uta.edu/index.php)– Jan 8 - Int’l review of VXD and intmed track– first discussion on GDN (M. Hildreth/R. VanKooten)
– Next summer• Cornell
• More frequent meetings of working groups between bi-annual ALCPG meetings
• Monthly continental televideo/teleconferences ten per year (begin December 12)
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IEEE Nuclear Science SymposiumPortland, Oregon Oct 19-24, 2003
• Conference series with long tradition for reports on high energy physics instrumentation
• papers published in IEEE Trans. on Nucl. Science
• Abstract and summaries due May 16, 2003http://www.nss-mic.org/2003/nsshome2003.html
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Conclusions American LC Physics and Detector
R&D
• There has been a significant spurt of activity in the N. American community during 2002
• We expect increased support for R&D in the coming year, making possible much increased detector hardware efforts
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Jim Brau, Prague, November 17, 2002
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Topics to be discussed include:
• Photon Collider physics at a future LC
• The potential for a low energy photon collider demonstration to increase confidence in the technical feasability of a photon collider facility at a future LC.
• Detailed discussions on the requirements for a photon collider demonstration at SLC including:
– Laser and Optics hardware.– Current status of SLC and requirements for its revival.– Observation of gamma-gamma luminosity using SLD or other detectors.
• A roundtable discussion of the timescales for decisions about the project scope of a future LC and whether a photon collider test facility can have an impact on those decisions.
• The possibility of photon collider experiments at sub-LC energies.
Workshop on Low Energy Photon Collider Facilities
November 21 -22, 2002
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Radiative Corrections (Loopverein)
• In recognition of the unprecedented level of precision at the Linear Collider, theoretical predictions will require the highest level of precision
• The American group hosted a meeting at Brookhaven, May 9-10
• Work to ensure our measurements are not unnecessarily limited by theory is well under way
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