Testing Novel TOF Detectors @ ELBE STATUS REPORT F. Dohrmann, E. Grosse, K. Heidel, B. Kämpfer, R. Kotte, L.Naumann Forschungszentrum Rossendorf Institut für Kern- u. Hadronenphysik September 2004
Radiation Source ELBE
Beam Parameters Energy 20 MeV (40 MeV in 2005) Currents up to 1 mA Micro beam structure: Standard mode: <10 ps bunches in 77 ns intervals (13 MHz) Intervals may be digitally sparsified (2,4,…256) or shortened up to 260 MHz (factor of 20) Macro beam structure smallest repetition rate 38 ms No multi user mode possible
Beam Parameters scattering chamber Ideal scenario: direct use of very low intensity primary electron beam ( 103 e- /s) However: beam diagnostics currently limits controllable beam current to 1 mA ( ie 1013 e- /s) scattering experiment 10 nA up to 100 nA on thin target foil or diamond. Detect scattered e- to study background and intensities. Simulations with FLUKA and Geant4
Setup Goniometerchamber
Goniometer Target Holder Setup Goniometer Target Holder
Radiation Physics Cave
Radiation Physics Cave e- energy distrib for 10 mm Al q=40—50o Eekin/GeV Simulation(FLUKA) by B. Naumann, FZR
Radiation Physics Cave e- energy distrib for 10 mm Al q=40—50o g energy distrib for 10 mm Al q=40—50o Eekin/GeV Simulation (FLUKA) by B. Naumann, FZR
Classic Data from Hofstadter(I) PR 92, 978 (1953)
Classic Data from Hofstadter(II) PR 92, 978 (1953)
Background Studies First measurements in summer 2004
Outlook Time reference with scintillators Prepare RPC tests Fast reference scintillators with XP2020 PMTs Prepare RPC tests contacted RPC developers at Coimbra, GSI and INR Moscow Hardware installation First RPC prototype obtained for testing Gas system installation (iso-Butane, SF6, R134a) for RPC tests in cave and lab Readout electronics, triggermodules, RIOs etc. In addition will setup a dedicated cave for testing in 2005