RUPAC2012 - List of Authors (Steck, M.)

Paper

Title

Page

Current Plans for Beam Cooling at FAIR

63

M. Steck
GSI, Darmstadt, Germany

In the new FAIR accelerator facility the production of intense secondary beams largely relies on beam cooling. The pre-cooling of secondary beams, either antiprotons or rare isotopes, is performed in the large acceptance Collector Ring (CR). A stochastic cooling system is under development which can be applied to both species, although they have different velocities. After transfer of the pre-cooled beams to the High Energy Storage Ring (HESR) stochastic and electron cooling will be available. In the HESR cooling allows accumulation of secondary beams, improvement of beam quality and luminosity for internal experiments and compensation of beam heating by the internal target. The proposed cooling procedures and the status of the beam cooling systems will be reviewed.

Slides TUZCH01 [4.493 MB]

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
TUZCH01	Current Plans for Beam Cooling at FAIR	63
	M. Steck GSI, Darmstadt, Germany
	In the new FAIR accelerator facility the production of intense secondary beams largely relies on beam cooling. The pre-cooling of secondary beams, either antiprotons or rare isotopes, is performed in the large acceptance Collector Ring (CR). A stochastic cooling system is under development which can be applied to both species, although they have different velocities. After transfer of the pre-cooled beams to the High Energy Storage Ring (HESR) stochastic and electron cooling will be available. In the HESR cooling allows accumulation of secondary beams, improvement of beam quality and luminosity for internal experiments and compensation of beam heating by the internal target. The proposed cooling procedures and the status of the beam cooling systems will be reviewed.
	Slides TUZCH01 [4.493 MB]

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.