Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session Q13: Mini-Symposium: FRIB and ReA Instrumentation I
10:45 AM–12:33 PM,
Monday, April 15, 2019
Sheraton
Room: Plaza Court 2
Sponsoring
Unit:
DNP
Chair: Andrew Rogers, UMass Lowell
Abstract: Q13.00003 : ISLA Preliminary Design Performance
11:33 AM–11:45 AM
Presenter:
A. Matthew Amthor
(Bucknell University)
Authors:
A. Matthew Amthor
(Bucknell University)
Daniel Bazin
(Michigan State University, NSCL)
Alexandre Comsa
(Michigan State University)
Wolfgang Mittig
(Michigan State University, NSCL)
The Isochronous Separator with Large Acceptance (ISLA) was identified by the ReA12 Recoil Separator working group of the FRIB Users Organization as the single device that meets the needs of all the physics cases proposed by the community for studies with reaccelerated rare isotope beams from ReA at FRIB. ReA will reaccelerate stopped FRIB beams to energies ideal for transfer reactions, multiple Coulomb excitation, fusion, and deep inelastic scattering. ISLA will provide efficient rejection of unreacted beam; large acceptances of momentum (±10%), angle (64 msr), and charge state (±10%) distributions; and high M/Q resolving power (>400) for reaction products. The purely magnetic system will accept magnetic rigidities up to 2.5Tm, to match ReA12 incoming beam rigidities and have no electric rigidity limit. M/Q separation in time-of-flight and a long preceding drift will allow efficient detection at a compact focal plane. Recent progress will be presented on the optimization of the magnetostatic design of the four large multi-function ISLA dipoles, the performance of the current designs in advanced Monte Carlo simulations of ISLA, and the evaluation of design alternatives for tunable quadrupole field components.
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