HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Measurements with a Detector System for Low Energy Hydrogen.

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Presentation transcript:

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Measurements with a Detector System for Low Energy Hydrogen Group members: C. Gabor O. Meusel J. Pozimski H. Klein U. Ratzinger Work supported by HPRI-CT Topcis General Overview of the Experiment Mean Parameters of the Scintillator Material Experimental Results Comparision between Hydrogen and Uranium

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Nondestructive H – Beam Emittance Measurement -> driven by neutralization of photodetachment -> peak cross section σ = 4* cm 2 at wavelength of 830 nm

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Experimental setup: Overview

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Prelimary Experiment (With the help and Acknowledgment of GSI) Proton current <70µA 6 keV beam energy 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 ?  Simulations (with TRIM/ SRIM) are reasonable !

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Scintillator Material ~ Efficiency ~ Emission spectrum ~ Luminescense decay time -> Max. thickness d ~ 100µm -> Grain size > 1µm -> 3-4 layer of phosphor grains QE > 70% of CCD: nm

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Principle: Nuclear and Electronic Energy Stopping Power Stopping Cross Section

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Energy Stopping Power of Hydrogen in Scintillator Material SRIM simulation: Hydrogen in Scintillator material => Thickness and grain size

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Coating layer: Aluminium Al can improove the photon luminosity

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Fotos: CCD camera + laser entrance window

HITRAP-Meeting at GSI, Sept., 22 nd, 2005 C.Gabor, O.Meusel, J.Pozimski, H.Klein, U.Ratzinger Detector system, Raw Data and Smooth Function Two-dimensional gaussian fit-function Dimensions depends of the zoom lens (aperture, distance) Screen images shown in fals colors