Method of the ion beam emittance measurement in the injection beam line of DC-72 cyclotron in the presence of its space charge using the scanner to determine beam dimensions

The gradient method for measuring the transversal emittance of a high current ion beam in the injection channel of the cyclotron DC-72 is considered. The standard scanner is proposed for measuring the transversal dimensions of the beam. The formulae for determination of the mean square beam dimensions by current signals from the scanner needle are adduced. The method of the emittance recovery for axial-symmetric ion beam is set for the case when the space charge effect is essential. The algorithm for tuning of the quadrupole lenses in the injection channel of the cyclotron DC-72 for obtaining the axial-symmetric ion beam is proposed. The evaluations of the expected accuracy of the proposed method for the emittance recovery have been carried out.