DIPAC09 - List of Authors (Ensinger, W.)

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Ensinger, W.

Paper	Title	Page
TUPB04	High Current Ion Beam Investigations on Inorganic Scintillation Screens	167
	E. Guetlich, P. Forck, B. Walasek-Höhne GSI, Darmstadt W. Ensinger Technical University Darmstadt, Darmstadt
	Optical properties of scintillating screens were studied for various materials and different ion beams at GSI. C²⁺, Ar¹⁰⁺, Ni⁹⁺ and U²⁸⁺-ion beams were applied, in the energy range from 5.5 to 11.4 MeV/u with currents up to some mA, as delivered by the heavy ion LINAC at GSI. Scintillation screens are widely used and are an essential part of a pepper-pot emittance device for which the precise mapping of the beam profile is a critical issue. However, precise measurements of the beam profile yield ambivalent results, especially for high beam currents,. The investigations were not only focused on well-known scintillators but also ceramic materials with lower light yield were studied. Their properties (light yield, beam width and higher statistical moments) are compared with different Quartz-glass screens. The recorded beam width shows dependence on the scintillation material and a decrease of the light yield was observed for some materials. Additionally, the light yield and beam width depend significantly on the screen temperature, which is increased by the ion impact. The empirical results are discussed and concepts for further investigations on the materials are presented. E. Gütlich, P. Forck et al., GSI-Scientific Report 2007 p.105 and 2008 (to be published). ** E. Gütlich, P. Forck, et al., Proc. Beam Instrum. Workshop BIW, Lake Tahoe (2008).

Paper

Title

Page

TUPB04

High Current Ion Beam Investigations on Inorganic Scintillation Screens

167

E. Guetlich, P. Forck, B. Walasek-Höhne
GSI, Darmstadt
W. Ensinger
Technical University Darmstadt, Darmstadt

Optical properties of scintillating screens were studied for various materials and different ion beams at GSI. C²⁺, Ar¹⁰⁺, Ni⁹⁺ and U²⁸⁺-ion beams were applied, in the energy range from 5.5 to 11.4 MeV/u with currents up to some mA, as delivered by the heavy ion LINAC at GSI. Scintillation screens are widely used and are an essential part of a pepper-pot emittance device for which the precise mapping of the beam profile is a critical issue. However, precise measurements of the beam profile yield ambivalent results, especially for high beam currents*,**. The investigations were not only focused on well-known scintillators but also ceramic materials with lower light yield were studied. Their properties (light yield, beam width and higher statistical moments) are compared with different Quartz-glass screens. The recorded beam width shows dependence on the scintillation material and a decrease of the light yield was observed for some materials. Additionally, the light yield and beam width depend significantly on the screen temperature, which is increased by the ion impact. The empirical results are discussed and concepts for further investigations on the materials are presented.

* E. Gütlich, P. Forck et al., GSI-Scientific Report 2007 p.105 and 2008 (to be published).
** E. Gütlich, P. Forck, et al., Proc. Beam Instrum. Workshop BIW, Lake Tahoe (2008).