100 likes | 196 Views
Measurements with a Detector System for Low Energy Hydrogen. Topcis General Overview of the Experiment Mean Parameters of the Scintillator Material Experimental Results Comparision between Hydrogen and Uranium. Group members: C. Gabor O. Meusel J. Pozimski H. Klein U. Ratzinger
E N D
Measurements with a Detector System for Low Energy Hydrogen Topcis General Overview of the Experiment Mean Parameters of the Scintillator Material Experimental Results Comparision between Hydrogen and Uranium Group members: C. Gabor O. Meusel J. Pozimski H. Klein U. Ratzinger Work supported by HPRI-CT-2001-50021
Nondestructive H– Beam EmittanceMeasurement -> driven by neutralization of photodetachment -> peak cross section σ = 4*10-17 cm2 at wavelength of 830 nm
Prelimary Experiment (With the help and Acknowledgment of GSI) Main Parameters -> Phosphor material -> Grain size (and number of the layer) of the phosphor screen -> Thickness of the layer -> Coating (Al reflection layer) -> Mechanic stability (water glass) -> electric contact necassary ? Proton current <70µA 6 keV beam energy • Simulations (with TRIM/ SRIM) are reasonable !
Scintillator Material ~ Efficiency ~ Emission spectrum ~ Luminescense decay time QE > 70% of CCD: 500.....750nm -> Max. thickness d ~ 100µm -> Grain size > 1µm -> 3-4 layer of phosphor grains
Principle: Nuclear and Electronic Energy Stopping Power Stopping Cross Section
Energy Stopping Power of Hydrogen in Scintillator Material SRIM simulation: Hydrogen in Scintillator material => Thickness and grain size
Coating layer: Aluminium Al can improove the photon luminosity
Detector system, Raw Data and Smooth Function Screen images shown in fals colors Two-dimensional gaussian fit-function Dimensions depends of the zoom lens (aperture, distance)