Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session 1WD: New Science Opportunities at RIB Facilities IInvited
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Sponsoring Units: DNP Chair: Chris Ruiz, TRIUMF Room: Junior Ballroom D |
Thursday, October 13, 2016 9:00AM - 9:36AM |
1WD.00001: Studying the r-process at FRIB and NSCL Invited Speaker: Artemis Spyrou The astrophysical r-process is responsible for the synthesis of about half of the isotopes of the heavy elements. Despite its well-known role in nucleosythesis, the astrophysical site where it takes place has not been unambiguously determined. Efforts for the better understanding of this important process span across many fields, from astronomical observations of metal-poor stars, gravitational-wave studies, and modeling of the possible scenarios, to sensitivity studies, nuclear theory calculations and nuclear experiments. This talk will focus on some of the experimental challenges, recent advances and future plans to provide reliable nuclear input data for r-process calculations. n particular, recent results on nuclear structure studies around A=70 and implications for the r-process will be presented. In addition, the talk will discuss one of the important r-process inputs that is practically unconstrained by experiment, namely neutron capture reactions. The development of a new technique to experimentally constrain these important (n,$\gamma$) reaction rates will be presented. The relevant experiments were done at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University using the $\gamma$-calorimeter SuN. Future plans for exciting new opportunities at FRIB will also be discussed. [Preview Abstract] |
Thursday, October 13, 2016 9:36AM - 10:12AM |
1WD.00002: The ISAC and ARIEL Facilities at TRIUMF. Invited Speaker: Adam Garnsworthy The TRIUMF-ISAC rare-isotope beam facility provides intense beams of short-lived isotopes in the energy range from 20 keV to more than 5 MeV/u to a large suite of world-class experimental apparatus. The research programs enabled by these beams are focused on understanding the evolution of nuclear structure towards the limits of existence, the origin of the chemical elements in the universe, searching for physics beyond the standard model of particle physics, and the characterization of magnetic properties of new materials at surfaces and interfaces.TRIUMF is pursuing the ARIEL major expansion to the beam production capabilities with the addition of two new ISOL target stations with associated mass selection and purification that will serve the existing experimental apparatus of ISAC. One of the new target stations will receive a proton beam from the TRIUMF 520MeV cyclotron while the other will utilize intense electron beams provided by a high-power electron linac. Ultimately the ISAC and ARIEL systems will provide three simultaneous beams to enable forefront research programs. An overview of the experimental apparatus and the beam-delivery infrastructure will be given to explore the wide range of future research opportunities. [Preview Abstract] |
Thursday, October 13, 2016 10:12AM - 10:48AM |
1WD.00003: Status of the Cyclotron Institute Upgrade Project Invited Speaker: Dan Melconian The Texas A\&M University Re-accelerated EXotics (T-REX) project, an upgrade to the Cyclotron Institute, will provide high-quality re-accelerated secondary beams of a unique energy range and the ability to provide primary beams to two experiments concurrently. The upgrade is nearing completion of its three major tasks: re-commissioning of the existing K150 cyclotron; construction of light- and heavy-ion guide transport systems; and charge-boosting the K150 RIB for re-acceleration using the K500 cyclotron.\\ The light-ion guide transport system will utilize the high intensity ($\geq10~\mu$A) proton beam from the K150 to produce rare ions via fusion-evapouration reactions or proton-induced fission fragments. These ions will be transported to an ECR charge breeder prior to injection in the K500. The heavy-ion guide will use deep inelastic, transfer and fragmentation reactions using the up to $25~\mathrm{MeV/u}$ primary beams from the K150. The products will be separated by a superconducting solenoid and collected in a large gas-catcher, after which a multi-RFQ system will transport the RIB to any of: the charge-breeder and K500; the TAMU Penning Trap beamline; or an MR-TOF for beam analysis.\\ The status of the T-REX upgrade and an overview of its capabilities will be presented [Preview Abstract] |
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