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Experimental Measurement of Low Energy Hydrogen with Scintillator Detectors

This study presents an experimental overview of measuring low energy hydrogen using a detector system based on scintillator materials. Key parameters, including the properties of phosphor materials and experimental setup, are detailed to understand the efficiency and performance of the detection system. Experimental results include a comparison of hydrogen and uranium groups, highlighting the peak cross section at specific wavelengths. The work, supported by HPRI-CT-2001-50021, illustrates the significance of various factors such as grain size, layer thickness, and coating in optimizing photon luminosity.

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Experimental Measurement of Low Energy Hydrogen with Scintillator Detectors

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  1. 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

  2. Nondestructive H– Beam EmittanceMeasurement -> driven by neutralization of photodetachment -> peak cross section σ = 4*10-17 cm2 at wavelength of 830 nm

  3. Experimental setup: Overview

  4. 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 !

  5. 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

  6. Principle: Nuclear and Electronic Energy Stopping Power Stopping Cross Section

  7. Energy Stopping Power of Hydrogen in Scintillator Material SRIM simulation: Hydrogen in Scintillator material => Thickness and grain size

  8. Coating layer: Aluminium Al can improove the photon luminosity

  9. Fotos: CCD camera + laser entrance window

  10. 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)

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