I-X-Particle-detection.ppt

RICH1Ring Imaging Cherenkov 80 m3 (3 m C4F10) 116 VUV mirrors (3.3 m focal length) 5.3 m2 VUV detectors MWPC CsI photon-sensitive cathodes 8x8 mm2 pads 84k channels of analog read-out RICH-1 Hadron reconstruction without and with RICH 4. Particle interaction with condensed matter, particle detection 4.1 Charged particles 4.1.1 Basic terms 4.1.2 Bethe-Bloch formula 4.1.3 Cherenkov effect 4.2 Photons 4.3 Neutrons 4.4 Some practical devices Gas Electron Multiplier foils (Sauli 1995) * Range of charged particles (E. Segrè, Nuclei and particles) Alpha-particles in air (discovery of the proton) (E. Segrè, Die gro?en Physiker...) Bragg curves (E. Segrè, Nuclei and particles) Range of charged particles (aus: C. Grupen, Teilchendetektoren) Muons in rock: Electrons in various materials: Bethe – Bloch formula: Energy loss of charged particles due to ionisation Energy loss of various charged particles in air (C. Grupen, Teilchendetektoren) Energy loss of minimum ionising particles Contributions to the energy loss of muons in iron (C. Grupen, Teilchendetektoren) Multiple scattering of electrons (W.R. Leo, Techniques...) Beam broadening: Backscattering: Books on particle detection: G. Knoll: Radiation detection (Addison Wesley) W.R. Leo: Techniques for nuclear and particle physics experiments, a how-to approach (Springer) C. Grupen: Teilchendetektoren (B.I. Wissenschaftsverlag) Cherenkov - Effect Cherenkov-radiators an event from on-line display VUV mirror wall, 21 m2, 116 mirrors Photon detectors (PD) : MWPCs with CsI photocathodes (5.3 m2), 84,000 analog read-out ch.s 2 hadrons Decay: N ? K+ K- one or two Kaons identified in RICH both Kaons identified in RICH ?Kaon identification efficiency from N-decay ~35% Photons in lead (C. Grupen, Teilchendetektoren) Neutrons Ionisat