photonuclear physics & hadron physics
TRANSCRIPT
Photonuclear & Hadron Physics Future outlook
Daniel WattsUniversity of Edinburgh
Scope of talk
• Forward look at future Photonuclear/Hadron Physics facilities
• Indicate the present engagement of the Glasgow and Edinburgh groups in these projects in terms of equipment R&D
• Outline (some of!) our Physics interests at the new facilities
Worldwide activity
Ee- = 0.9 - 12 GeV
Ee- = 1.5 GeV
Ee- = 0.25GeVEe- = 27.5 GeV
Facilities : Medium to long TermPp =15 GeV/c
Timelines & Upgrades
2005
2010
2015
2020
2025 Facility upgrade
[email protected] GeV106γs-1MeV-1
[email protected] GeV105γs-1MeV-1
JLab@12 GeV108 γs-1
Panda@15 GeV/c1011 p stored& cooled
• 100% duty factor electron microtron• MAMI-C 1.5 GeV upgrade (2006)
(MAMI-B 0.85 GeV)
The MAMI-C facility
One of the MAMI-C magnets γ
e
Contributions to Future facilities : MAMI-CUpgrade of photon tagger & polarised γ (Glasgow)
Recoil Nucleon Polarimetry (Edinburgh)
Particle Identification sub-detector (Edinburgh)
Recoil Polarimeter
Analysing scatterer
TAPSScattered nucleon
detectorCrystal Ball
γHydrogen target cell
Tracking detectorp
Physics : MAMI-C• Provide “ambiguity free” information on the spectrum of nucleon resonances – First ever complete determination of observables
γ + N → N* → N + π
• Magnetic moments of nucleon resonances e.g. µ(s11(1535))
• World’s leading η,η’ meson production facility - Test QCD based models and C, CP, CPT invariance
• Precision Nuclear Matter form factor measurements (~0.05 fm accuracy)
• Use photon probe as complimentary way to access neutron rich nuclei??
JLab@12 GeV
TOF
40o
DC
Target
Torus Coil
DC
0
Gas Cherenkov High threshold
Flux return
EC/SCTracker
5m
5o
Winston Conesamd PMTs
Forward ECFreon-13B
or CO2
Solenoid Coil
ShieldSolenoid
Moeller
9 GeV tagged polarized photons and a 4π hermetic detector
D
Super High Momentum Spectrometer (SHMS) at high luminosity and forward angles
CTargetPolarization: 40%
To BeamDump
Moller Polarimeter
Laser hut
Beam Polarization: 80%Beam Current: 15 µA
D
QD
DQ
HRS Spectrometer
Detector
D
Q
Q
Q
D
Q
Q
Q
HRS Spe
ctro
met
er
Shower Counter
Drift Chambers
Scintillators
ovCerenk
Medium-Acceptance Device
Spectrometer
Medium Acceptance Detector (MAD) at high luminosity and intermediate angles and Big Bite spectrometer
CLAS upgraded to higher luminosity and coverage
B
A
Proposed detector facilities:JLab@12 GeV
Contributions to Future facilities:JLab@12 GeV
Design of Magnet for Hall D photon tagging spectrometer (Glasgow)
Polarised photon R&D (Glasgow)
Hall D Magnet design Big Bite
Focal plane detector for large acceptance “Big Bite” Spectrometer (Glasgow)
Nucleon Polarimetry (Edinburgh)
Polarised nucleon target development (Edinburgh/Glasgow)
G. Bali et al.,hep-lat/0003012
aV(r) br
r= − +
q q Hall D:Flux Tube excitation leads to a new spectrum of hybrid mesonsSome hybrids have exotic quantum numbers
Physics: JLab@12 GeV
quark motion plusflux tube excitation
Q
Q
JPC = 0-+ 0+- 1+- 1-+ 2-+ 2+-
exotic
Halls A, B, C:Elastic electron scattering: Form factors of simple quark systems D, n, p
Polarised Inclusive/Semi-inclusive/exclusive electron scattering: Colour transparencyQuark distribution/polarisations in the nucleon, DVCS → Generalised Parton Distributions (GPDs)
ee’
27.6 GeV e+/e-
DVCS at Hermes : Recoil Detector
HESR /PANDA
PANDA@FAIR
1011 stored and cooled 1 - 15 GeV/c antiprotons
Physics : PANDA@FAIR
ggg
Physics : PANDA@FAIR
Glueballs – exotic objects with no quarks. Comprised entirely of gluons!
Fundamental test of QCD
Antiproton annihilations wellsuited to creating gluon richfinal states
gg
g
Glueball spectrum predicted from Lattice QCD
Contributions to Future facilities : PANDA@FAIRDesign of magnetic solenoid (Glasgow)
RICH (Glasgow)Endcap DIRC (Edinburgh)
Grid computing technology (Glasgow)
Nucleon Polarimetry (Edinburgh)
p
Interaction point
SolenoidDipole
EM and hadroncalorimeters
RICH
Drift or wirechambers
Muon counters
Simulations (Glasgow/Edinburgh)
Summary
• Edinburgh and Glasgow groups will utilise four major new facilities which come online in the next 1-6 years ([email protected], [email protected], JLab@12GeVPANDA@FAIR)
• We are in a good position to exploit and develop these new opportunities