institut für kern- und hadronenphysik testing novel tof detectors @ elbe status report f. dohrmann,...
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Institut für Kern- und Hadronenphysik
Testing Novel TOF Detectors @ ELBE
STATUS REPORT
F. Dohrmann, E. Grosse, K. Heidel, B. Kämpfer, R. Kotte, L.Naumann
Forschungszentrum RossendorfInstitut für Kern- u. Hadronenphysik
September 2004
Institut für Kern- und Hadronenphysik
Radiation Source ELBERadiation Source ELBE
Institut für Kern- und Hadronenphysik
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
Institut für Kern- und Hadronenphysik
Beam Parameters
• Ideal scenario: direct use of very low intensity primary electron beam ( 103 e- /s)
• However: beam diagnostics currently limits controllable beam current to 1 A ( 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
scattering chamber
Institut für Kern- und Hadronenphysik
GoniometerchamberSetup
Institut für Kern- und Hadronenphysik
Goniometer Target HolderSetup
Institut für Kern- und Hadronenphysik
Radiation Physics CaveRadiation Physics Cave
Institut für Kern- und Hadronenphysik
Institut für Kern- und Hadronenphysik
Radiation Physics CaveRadiation Physics Cave
e- energy distrib for 10 m Al =40—50o
Eekin/GeV
Simulation(FLUKA) by B. Naumann, FZR
Institut für Kern- und Hadronenphysik
Radiation Physics CaveRadiation Physics Cave
e- energy distrib for 10 m Al =40—50o
Eekin/GeV
energy distrib for 10 m Al =40—50o
Simulation (FLUKA) by B. Naumann, FZR
Classic Data from Hofstadter(I) PR 92, 978 (1953)
Classic Data from Hofstadter(II) PR 92, 978 (1953)
Institut für Kern- und Hadronenphysik
Background Studies
First measurements in summer 2004
Institut für Kern- und Hadronenphysik
Outlook
• Time reference with scintillators– 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