Presentation on theme: "The Electron Nucleon Collider a possible future upgrade to FAIR F. Maas Helmholtz Institute Mainz NuPECC town meeting May 31 - June 2, 2010 CSIC, Madrid."— Presentation transcript:
The Electron Nucleon Collider a possible future upgrade to FAIR F. Maas Helmholtz Institute Mainz NuPECC town meeting May 31 - June 2, 2010 CSIC, Madrid
Scientific Goals - Challenge: understand the structure of hadrons and their excited states from first principles - Predict hadronic properties and processes with good and controlled precision. - Ideal probe: CC neutrino and anti-neutrino interactions - More realistic: interaction of polarized charged lepton beams with polarized p and d - dominated by γ exchange at Q 2 M 2 Z,W, coupling to quark charges only- doubly polarized: projecting helicities - Spin flavour structure of quarks f, g (longitudinal), h(transverse) and polarized Gluons - Effects of finite transverse size, correlation of b and x, orbital angular momentum, GPDs - Effects of transverse momentum k of quarks, gauge links
High Energy Lepton Scattering inclusive Scattering (lepton only), exclusive Scattering (complete final state: lepton, photon, proton), semi-inclusive scattering
High luminosity lepton-nucleon collider - The electromagnetic probe: precision of the EW interaction, but needs high luminosity - Lepton scattering on hadron targets in new regimes yielded new insights, e.g. DIS, EMC effect, Glue - new regimes: Exclusive reactions, Semiinclusive Deep Inelastic Scattering - High E cm yields a large range of x, Q 2 x range: valence, sea quarks, glue Q 2 range: evolution equations of QCD- High polarization of lepton, nucleon achievable dilution in fixed target experiments- Collider geometry allows complete reconstruction of final state
30 Years of Deep Inelastic Scattering - 1970 - 2000 Analysis of DIS in terms of pQCD
Energy/Luminosity Landscape ENC Electron Nucleon Collider: - high energy - high luminosity - polarisation LHeC
Transverse Momentum Dependent Parton Distributions QCD prediction: transversely polarised target in PANDA; PAX
Study of Beam Dynamics: Beam equilibria and luminosities Study of Spin Dynamics: Spin resonances in SIS18 and HESR
Andreas Jankowiak, Institut für Kernphysik, Johannes Gutenberg – University Mainz idea: ENC@FAIR P e-e- pol. e - -inj. L > 10 32 1/cm 2 s s 1/2 > 10GeV (3.3GeV e - 15GeV p) polarised e - ( > 80%) polarised p / d ( > 80%) (transversal + longitudinal) using the PANDA detector Common effort of German Universities (Bonn, Mainz, Dortmund) plus collaboration with Research Centres FZJ, DESY, GSI,... HESR pRing eRing PANDA 8MV eCool
Andreas Jankowiak, Institut für Kernphysik, Johannes Gutenberg – University Mainz The eRing 24to dipole, 4.3to quadrupole both nc eRing dipole: ca. 0.4m×0.25m and 1.6to for 4m length eRing inside the HESR tunnel ! In addition: - cavities - spin-manipulation - injection/extraction - feedback -...
Andreas Jankowiak, Institut für Kernphysik, Johannes Gutenberg – University Mainz HESR / 15GeV peRing / 3.3GeV L [circumference, m]576577.126 R [bending radius, m]3025 norm / geo [mm mrad ]2 / 0.13 IP [m] 0.1 r IP [mm] / IP [mrad]0.111 / 1.12 l [bunch length, m]0.1< 0.1 n [particle / bunch 10 10 ]3.623 I b [bunch current, mA]3.019.1 h [bunches / ring] 200 I [total current, A]0.603.82 P SR [sr-Power, kW] / [kW/m]1590 / 10 f coll [collision freq., MHz]103.892 coll [bunch distance, m]2.882.8857 Δ Q sc 0.1 [beam beam parameter]0.0140.01 Luminosität [1/(cm 2 s)] (inc. 80% hour glass red.) 1 - 4 · 10 32 P [polarisation, %]80% needs 8.2MV eCool IR + detector design bunching process B-factory design x 2 possible under collision? polarisation preservation? polarisation?
L dt (fb -1 ) E CM (GeV) 0 20 40 60 80 Science reach as a function of E CM and integrated luminosity 100 120 110100 gluon saturation sin 2 θ W DIS nucleon structure exclusive, electroweak processes x min ~ 10 -2 x min ~ 10 -3 x min ~ 10 -4 50 fb -1 quarks, gluons in nuclei 4 X 250 MeRHIC 10 X 250 EIC 3 X 15 ENC
ENC@PANDA@FAIR: - A polarized Electron-Nucleon-Collider L 4 10 32 /cm 2 /s s 200 GeV 2 - add 3 GeV electron beam in HESR tunnel to 15 GeV protons - polarised proton source - needs 8 MeV electron cooling - highly polarised electron and nucleon beam - factor of 100 higher FOM in doubly polarised channels - (slightly) modified PANDA detector with shifted IR - first step in IR-design, polarisation - great potential for exploring the structure of the nucleon Summary