CERN Accelerating science

Preprint
Report number	E9-2004-146 ; JINR-E9-2004-146
Title	Measurement of H$^{-}$ Beam Emittance in Axial Injection Channel of DC-72 Cyclotron
Author(s)	Kazarinov, N ; Kazacha, V I ; Kalagin, I V ; Aleinikov, V V ; Krylov, A I
Affiliation	(Flerov Laboratory of Nuclear Reactions, Dubna)
Publication	2004
Imprint	17 Sep 2004
Number of pages	10
Subject category	Accelerators and Storage Rings
Abstract	A method of measuring the ion beam transversal emittance in the axial injection channel of DC-72 cyclotron is given. It is based on the gradient method using the standard rotating wire scanner for measurement of the transversal ion beam dimensions. This method was worked out for ion beam currents up to 1000 $\mu$A and allows one to reconstruct emittance with an accuracy about 30{\%}. The method takes into account the ion beam self-charge, which is essential. It is not always a success to obtain an axial-symmetric ion beam in experiments. Therefore, a new experimental data processing method of measuring the transversal emittance for a non-axial-symmetric ion beam was suggested. The formulae for determination of the RMS dispersions of the ion beam dimensions in the rotating coordinate system by signals from the scanner wire are given. The measurements of the RMS emittances $\varepsilon
Submitted by	[email protected]