PAC09 - List of Authors (Chouhan, S.)

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Chouhan, S.

Paper	Title	Page
FR5PFP015	An Achromatic Mass Separator Design for Ions from the EBIT Charge Breeder at the NSCL	4341
	M. Portillo, G. Bollen, S. Chouhan, O.K. Kester, G. Machicoane, J. Ottarson, S. Schwarz, A. Zeller NSCL, East Lansing, Michigan
	Funding: This work was supported by Michigan State University and the National Science Foundation under grant PHY-0110253. The NSCL at Michigan State University (MSU) is implementing a system called the ReA3 to reaccelerate rare isotope beams from projectile fragmentation to energies of about 3 MeV/u. The re-acceleration system uses an Electron Beam Ion Trap (EBIT) to provide a compact and cost efficient system. We discuss the design parameters for a m/q separator that is to be used to separate highly charged ions from an EBIT type charge breeder. The separator is designed to accept ions at 12 keV/u with mass to charge ratios in the range of m/q = 2.5 to 5 amu. The goal is to separate selected rare isotope species from any residual ions before injecting them into the ReA3 linear accelerator system. Using ray tracing simulations with SIMION, as well as higher order map calculations with COSY INFINITY, the performance of the separator has been evaluated in terms of the expected mass resolution and overall acceptance. The separator consists of a magnetic sector and a series of electrostatic devices to obtain a first order achromatic tune. For comparison, similar performance values will be derived as those for a similar separator constructed at REX-ISOLDE*. D.A. Dahl, Int. J. Mass Spectrom. Ion Processes 200, 3 (2000) . K. Makino and M. Berz, Nucl. Instr. and Meth. A 558, 346 (2005) *R. Rao et. al., EPAC-98, Stockholm, Sweden, 2132-2134 (1998).

Paper

Title

Page

FR5PFP015

An Achromatic Mass Separator Design for Ions from the EBIT Charge Breeder at the NSCL

4341

M. Portillo, G. Bollen, S. Chouhan, O.K. Kester, G. Machicoane, J. Ottarson, S. Schwarz, A. Zeller
NSCL, East Lansing, Michigan

Funding: This work was supported by Michigan State University and the National Science Foundation under grant PHY-0110253.

The NSCL at Michigan State University (MSU) is implementing a system called the ReA3 to reaccelerate rare isotope beams from projectile fragmentation to energies of about 3 MeV/u. The re-acceleration system uses an Electron Beam Ion Trap (EBIT) to provide a compact and cost efficient system. We discuss the design parameters for a m/q separator that is to be used to separate highly charged ions from an EBIT type charge breeder. The separator is designed to accept ions at 12 keV/u with mass to charge ratios in the range of m/q = 2.5 to 5 amu. The goal is to separate selected rare isotope species from any residual ions before injecting them into the ReA3 linear accelerator system. Using ray tracing simulations with SIMION*, as well as higher order map calculations with COSY INFINITY**, the performance of the separator has been evaluated in terms of the expected mass resolution and overall acceptance. The separator consists of a magnetic sector and a series of electrostatic devices to obtain a first order achromatic tune. For comparison, similar performance values will be derived as those for a similar separator constructed at REX-ISOLDE***.

*D.A. Dahl, Int. J. Mass Spectrom. Ion Processes 200, 3 (2000) .
**K. Makino and M. Berz, Nucl. Instr. and Meth. A 558, 346 (2005)
***R. Rao et. al., EPAC-98, Stockholm, Sweden, 2132-2134 (1998).