forward physics at the lhc - a project review
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Forward Physics at the LHC - A Project Review. Risto Orava Helsinki Institute of Physics and Department of Physical Sciences University of Helsinki. 0.1. Orsay R.Orava 29. September 2003. - PowerPoint PPT PresentationTRANSCRIPT
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Forward Physics at the LHC - A Project Review
Risto Orava
Helsinki Institute of Physics andDepartment of Physical Sciences University of Helsinki
0.1Orsay R.Orava 29. September 2003
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Forward Physics Project Review - Contents
0.2
• Physics Goals & Bench Mark Processes• Forward Spectrometer at the LHC• The Helsinki Group: Resource basis, Plans• Summary
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Important part of the phase space is not covered by the baseline designs at LHC. Much of the large energy, small transverse energy particles are missed.
In the forward region (| > 5): few particles with large energies/small transverse momenta.
Charge flow
Energy flow
information value low: - bulk of the particles crated late in space-time
information value high: - leading particles created early in space-time
1.1
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Hgap gap
b
b -jet
-jet
Missing Mass can be accurately scanned in pp p + X + p by using the leading protons
Bench mark process at Tevatron: Exclusive Higgs production in pp p + + p with tagged antiprotons + rap gaps, di-jet mass fraction…
P1’ P2’
beam
p2’
p1’
dipole
Roman PotsMH
2 = Mmissing2
= (p1+p2-p1’-p2’)2
= Mbb2dipole
Mmissing = O(1 GeV)
Mbb = O(10GeV)
Roman Pots
MSSM with large tan=> 10 x SM!
1.2
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Upgrade scenarios and Forward detectors - CMS & TOTEM
2.2
• Technical Proposal submitted in 1999• Technical Design Report (TRD) to be completed by End 2003• Designed to co-exist with CMS and to run with large, intermediate and low * (1100m & 18m & 0.5m)• Aims at:
• Precision measurement of tot (tot ~ 1mb)• Elastic scattering down to -tmin ~ 10-3
• Diffractive scattering • Forward spectrometer:
• T1 & T2 for inelastics (3 < || < 7) • New collaborators: ILK Dresden, (Germany), Helsinki (Fi), Brunel London (UK), Warsaw (Pol)
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Experimental Apparatus at the LHC
Roman Pots/Microstations to measure elastic and diffractive protons
TOTEM integrated with the machine
Inelastic Detector
TOTEM integrated with CMS
Inelastic Detector
Roman Pot/Microstation
-concept
RP1 RP2 RP3 RP4
in
out
T1-T2T1-T2
2.1
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New layout of T2 - CMS/TOTEM Working Group on Diffraction
Silicon Pixel Tracker 5.0<<7.5
Electromagnetic Calorimeter 5.0<<7.5
Absorber
Optimized Conical Vacuum Chamber
A
A
0
10
20
30
40
50
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
eta
X/X
o
2.3
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A novel detector for measuring the leading protons - the Microstation - is designed to comply with the LHC requirements.
• A compact and light detector system • Integrated with the beam vacuum chamber • Geometry and materials compatible with the machine requirements• m accuracy in sensor movements • Robust and reliable to operate • Si strip or pixel detector technology
Development in cooperation with the LHC machine groups. 2.4
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Inner tube for rf fitting
Inch worm motor
Emergency actuator
Detector
Space for cables and cooling link
Space for encoder
6cm
Microstation
Note: A secondary vacuum is an option.
M.Ryynänen, R.Orava. /Helsinki group 2.5
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μstation, Secondary Vacuum Implementation
Detector
Beam vacuum
Secondary vacuum
2.12
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Research and Development: stations
• Beam impedance, electromagnetic pick-up bench measurements, shielding.
• Alignment, mechanical stability and reliability, emergency detector retraction from the beam.
• Cooling and cryogenic system studies (see Velo/LHC-b).• Bakeout tests, outgassing and vacuum tests.• Study of radiation hardness of the critical components:
– motors, – connectors and feedthroughs, – flexible connections at cryogenic temperatures in vacuum.
• Detector integration, position encoders, rad hardness, r-o cables.
2.15
Validation in collaboration with the LHC machine groups(as in the case of the Velo detector/LHC-b).
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Detector
Support
PitchAdapter
APV25
Hybrid
CoolingPipe
Spacer
A Silicon Detector Module/Totem4.11
n n
p
p
Back plane extented to side using p-diffusiondepletion region up to p and no guard ring is requiredsignal picked by n-strip up to p-diffusion<10m dead space at the edge of the detector
p back plane
p diffusion
n strip
2.18
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3D Detectors and Active edges3D Detectors and Active edges
3D TECHNOLOGYE-field line contained byedge (p) electrode
EDGE SENSITIVITY <10 m
Side view
Top viewPictures of processed structuresBrunel, Hawaii, Stanford 2003
EDGE SENSITIVITY <10 mCOLLECTION PATHS ~50 m
SPATIAL RESOLUTION 10-15 m
DEPLETION VOLTAGES < 10 V DEPLETION VOLTAGES ~105 V at 1015n/cm2
SPEED AT RT 3.5 ns
AREA COVERAGE 3X3 cm2
SIGNAL AMPLITUDE 24 000 e before Irradiation
SIGNAL AMPLITUDE 15 000 e- at 1015n/cm2
50 m pitch
S. Parker, C. Kenney1995
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pp
ac
ce
pta
nc
e
RP4 (215 m)RP7 (420 m)
RP6 (340 m)RP5 (300 m)
Diffraction Dissociation (High Luminosity)* = 0.5 m
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Proton Acceptance at 215, 308 and 420 m’s
Helsinki Group/Tuula Mäki
Acc
ep
tan
ce
MM (GeV)
0%
100%
200 400 600 800 1000
all stations together
stations at 215 and 420m
station at 215m alone
station at 420m alone
Conclusions: Acceptance from 40 GeV on, stations at 308m & 420m give 50% acceptance for 130 GeV Higgs
50%
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Missing Mass Resolution at 215, 308 and 420m’s
Helsinki Group/Tuula Mäki
M/M
M/M
M(GeV)
100
100 300 500 700
60 140 180
Conclusions: Stations at 308-420 m alone yield 1% M/M, All stations combined give 2% M/M for mH = 120 GeV
1%
4%
1%
3%
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The Helsinki Group - Collaboration
Helsinki Institute of Physics Physics and detector simulation,(hip.fi) R. Orava integration&testing, project coordination
Division of High Energy Physics, Physics and detector simulation,University of Helsinki project coordination(physics.helsinki.fi/~www_sefo/sefo.html)R. Orava
Durham University Phenomenology of Forward PhysicsV. Khoze
Iowa State University SimulationJ. Lamsa
Espoo-Vantaa Institute Software developmentof Technology (evitech.fi)T. Leinonen
Pohjois-Savo Polytechnic Hybrid development/RF testing/(pspt.fi) slow controls/testsH. Heikura & A.Toppinen
Rovaniemi Polytechnic Data base/GRID(ramk.fi) J. Leino
VTT Technical Research Edgeless Si-detectors for microstationCenter of Finland (vtt.fi)I. Suni, S. Eränen
Institute/ Coordinator Responsibility
1.2
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The Helsinki Group - CompositionMember Position Experience Task Funding(-03)
Avati V. PhD student Totem beam simulation HIP2
Bergholm V.1 PhD student summer student simulaton/tests grad.school2
Cwetanski P. PhD student ATLAS TRT detector tests CERN tech.student
Goussev E. Student summer student simulation/testsfellowship?
Järvinen M. student summer student simulation fellowship?
Kalliopuska J. PhD student summer student detector dev fellowship?
Kiiskinen A. post doc LHC R&D, Delphi simulation/tests HIP2
Kurvinen K. detector phys. LHC R&D, Delphi detector testsHIP&STUK
Lauhakangas R. DAQ eng. LHC R&D, Delphi,... DAQ HIP
Mäki T.1 PhD student summer student simulation/tests grad.school2
Noschis E. PhD student LHC R&D detector tests CERN tech.student
Oljemark F. student summer student simulation/tests fellowship?
Orava R. prof. LHC R&D, Delphi,E605 project leader HIP & UH
Palmieri V. post doc RD39, NA50... Si-detectors CERN project ass.2
Saarikko H. prof. Delphi, NA22, UA5 diffraction UH
Tapprogge S. post doc Atlas, H1, NA45 performance HIP
Österberg K. post doc LHCb, Delphi detector syst UH
+ technical trainees elec., software testing Polytechnics
+ student trainees high energy phys. MoE
1 Currently working on their MSc thesis 2 Foreseen source of funding1.1
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Project Activities: LHC
• intensive study on physics performance simulations continue• define the optimal layout of the detector locations / geometry• assess physics potential
• R&D on the microstation concept to converge • engineering prototype finished in autumn 2001• design and construction of a fully functional prototype to validate the microstation concept in the FNAL test beam
• final proposal to LHC for a coherent extension in forward region• design and construction of a production prototype • submit proposal to the LHCC 35
LHC represents a gluon factory with a factor 40 enhancement in gluon-gluon luminosity as compared to Tevatron – forward physics processes provide a clean environment for new physics, complementary to the base line program.
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Project Activities: LHC
• a wide range of physics and detector related aspects • supporting activities
•luminosity measurement •measurement of the elastic cross section•detector R&D
• to be carried out in collaboration with:• CMS-TOTEM (A. DeRoeck & K. Eggert) on Forward Spectrometer designs• TOTEM (K. Eggert) on Roman Pots/microstations, on Cryogenic Si-detectors (V.Palmieri), on edgeless Si-detectors (S. Parker, C. DaVia, VTT, Polytechnics)
36
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Forward Physics Project
Basic Research
Basic Research
Applied Research
Applied Research
Education, Training
Education, Training
HIP & University of HelsinkiHIP & University of Helsinki
Technology Transfer
Technology Transfer
PolytechnicsPolytechnics
VTT & IndustriesVTT & Industries
CERNCERN