NDLI: Ionisation Beam Profile Monitor at the Cooler Synchrotron Cosy-jülich

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Ionisation Beam Profile Monitor at the Cooler Synchrotron Cosy-jülich

Content Provider	Semantic Scholar
Author	Kamerdzhiev, Vsevolod Dietrich, Jens
Copyright Year	2004
Abstract	For beam profile measurements, a residual-gas ionisation beam profile monitor using a position sensitive micro channel plate (MCP) detector was developed and installed at the cooler synchrotron and storage ring COSY. Since COSY operates with beam intensities up to 10 11 protons/deuterons and a vacuum of 10 -11 10 mbar, there is a high risk of detector damage. The aging of the channel plates was investigated by means of scanning electron microscope and energy dispersive x-ray microanalysis. Different implemented detector protection mechanisms are discussed. Profile measurements with electron cooled beams are reported. INTRODUCTION To optimise the performance of an accelerator precise measurements of many beam parameters are required. To determine the actual charge distribution inside the beam and to find the value of beam emittance non destructive beam profile measurements are needed. One of the known techniques [1] relies on the ionisation of residual gas by the beam particles. A device utilising this principle was installed in the COSY ring [2,3]. DESIGN Between two electrodes a parallel ion drift field is maintained. Residual gas ions are drifted onto MCP chevron assembly that provides an electron multiplication factor up to 10 [4]. The secondary charge produced from each ion is collected by a wedge and strip anode (see Fig. 1) [5]. ! " #
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://epaper.kek.jp/d03/papers/PM19.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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