Diagnostics at the Frankfurt H- - LEBT

Jakob, A.; Gabor, C.; Meusel, O.; Pozimski, J.; Klein, H.; Ratzinger, U.
November 2002
AIP Conference Proceedings;2002, Vol. 639 Issue 1, p128
Academic Journal
A magnetic Low-Energy Beam-Transport line for negatively-charged hydrogen ions was set up in Frankfurt, Germany. In order to study the space-charge compensation process several conventional beam diagnostic principles were already established. But to prevent compensated ion beams from distortions caused by conventional measurement devices, nondestructive methods are to be developed: Investigations were carried out to determine the emittance of the ion beam based on laser driven photon detachment of the H[sup -]-electron using a non-destructive method. This method is capable of determining the transverse phase space distribution with high time resolution and a large number of phase space points [1]. Additional non-destructive diagnostic tools are installed to study the temporal development of the compensation process. For time resolved measurements an optical device using CCD-cameras for beam profile measurements, a Residual Gas Energy Analyzer, and an Electron Energy Analyzer for beam potential measurements were installed. The working principles of the measurement devices as well as the whole test bench and planned activities are described.


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