RUPAC2012 - List of Authors (Weick, H.)

Paper	Title	Page
TUPPB037	Second-Order Correction in the Isochronous Mode of the Collector Ring (CR) at FAIR	400
	S.A. Litvinov, C. Dimopoulou, A. Dolinskii, O.E. Gorda, F. Nolden, M. Steck, H. Weick GSI, Darmstadt, Germany
	A challenge for nuclear physics is to measure masses of exotic nuclei up to the limits of nuclear existence which are characterized by low production cross-sections and short half-lives. The large acceptance Collector Ring (CR) at FAIR tuned in the isochronous ion-optical mode offers unique possibilities for such measurements. However, the mass-measurement resolution is inversely proportional to the transverse emittance. In order to reach a resolving power of 10⁵ the transverse beam emittance would have to be limited up to 10 mm mrad in both planes, which drastically reduces the transmission of the exotic nuclei. We demonstrate here that the negative influence of the transverse emittance on the mass resolution can be significantly reduced by a proper second-order correction.

Paper

Title

Page

Second-Order Correction in the Isochronous Mode of the Collector Ring (CR) at FAIR

400

S.A. Litvinov, C. Dimopoulou, A. Dolinskii, O.E. Gorda, F. Nolden, M. Steck, H. Weick
GSI, Darmstadt, Germany

A challenge for nuclear physics is to measure masses of exotic nuclei up to the limits of nuclear existence which are characterized by low production cross-sections and short half-lives. The large acceptance Collector Ring (CR) at FAIR tuned in the isochronous ion-optical mode offers unique possibilities for such measurements. However, the mass-measurement resolution is inversely proportional to the transverse emittance. In order to reach a resolving power of 10⁵ the transverse beam emittance would have to be limited up to 10 mm mrad in both planes, which drastically reduces the transmission of the exotic nuclei. We demonstrate here that the negative influence of the transverse emittance on the mass resolution can be significantly reduced by a proper second-order correction.