S. Manikonda

Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon

A search for new isotopes using in-flight fission of a 345 MeV/nucleon 238 U beam has been carried out at the RI Beam Factory at the RIKEN Nishina Center. Fission fragments were analyzed and identi...

S3: The Super Separator Spectrometer for SPIRAL2 stable beams

S3 (Super Separator Spectrometer) is a device designed for experiments with the very high intensity stable beams of LINAG, the superconducting linear accelerator of GANIL, which will be built in the framework of SPIRAL2. These beams, which will provide ions with A/Q = 3 in SPIRAL2 phase one, can reach intensities up to 1mA for light ions, A<50. These unprecedented intensities open new opportunities in several physics domains, e.g. super‐heavy and very‐heavy nuclei, spectroscopy at and beyond the drip line, isomers and ground state properties, multi‐nucleon transfer and deep‐inelastic reactions. An international collaboration has been formed to propose physics experiments and develop technical solutions for this new instrument.

Code development for next-generation high-intensity large acceptance fragment separators

A suite of nuclear and atomic physics codes for computing a variety of quantities relevant for heavy-ions over a wide energy range passing through material were implemented in the DA-based beam optics code COSY Infinity. As extensions to COSY we also developed a limited fission model, map computation for beam-material interactions, and a hybrid map-Monte-Carlo mode that allows relatively fast and accurate fragment separator design, end-to-end modeling and simulations, and performance optimization. Some results are briefly mentioned; details will be published elsewhere.

CONCEPTUAL DESIGN OF A SUPERCONDUCTING QUADRUPOLE WITH ELLIPTICAL ACCEPTANCE AND TUNABLE HIGHER ORDER MULTIPOLES

For charged particle beams that are wider in the dispersive plane compared to the transverse plane it is cost efficient to utilize magnets that accept beams with elliptic cross section. In this paper we presents the conceptual design of a quadrupole magnet with elliptic cross section and with tunable higher order multipoles. The design consists of 18 superconducting race-track coils placed on two hollow concentric rhombic prism support structures. To compute the magnetic field for the proposed design a new method of calculating 2D and 3D fields for the air core magnets based on differential algebra (DA) techniques is developed. We will present the new method and discuss its implementation of new numerical tools based on this method in the code COSY Infinity.