Bulletin of the American Physical Society
APS April Meeting 2017
Volume 62, Number 1
Saturday–Tuesday, January 28–31, 2017; Washington, DC
Session E14: Isotope Production and Accelerator TechnologyInvited
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Sponsoring Units: DPB DNP Chair: Ed Hartouni, Lawrence Livermore National Laboratory Room: Washington 1 |
Saturday, January 28, 2017 3:30PM - 4:06PM |
E14.00001: Production of Mo-99 without highly enriched uranium Invited Speaker: Kevin Crowley |
Saturday, January 28, 2017 4:06PM - 4:42PM |
E14.00002: Isotope Harvesting Opportunities at FRIB Invited Speaker: David Morrissey The fragmentation of fast heavy ion beams now at the National Superconducting Cyclotron Laboratory (NSCL) and in the future at the Facility for Rare Isotope Beams (FRIB) under construction produce an unprecedentedly broad spectrum of radionuclides but only a small fraction are used in the on-line rare-isotope program. Projectile fragmentation facilities provide an electromagnetically purified beam of a single projectile fragment for nuclear physics experiments ranging from low energy astrophysics, through nuclear structure studies, to probing fundamental symmetries. By augmenting the NSCL and FRIB production facilities with complimentary collection and purification of discarded ions, called isotope harvesting with chemical purification, many other nuclides will become available for off-line experiments in parallel with the primary experiment. A growing user community has established a list of key target isotopes and is working with the FRIB design team to allow inclusion of necessary equipment in the future. An overview of the possibilities and the techniques will be presented in this talk. [Preview Abstract] |
Saturday, January 28, 2017 4:42PM - 5:18PM |
E14.00003: Nb$_{\mathrm{3}}$Sn SRF Cavities for Nuclear Physics Applications Invited Speaker: Grigory Eremeev Nuclear physics experiments rely increasingly on accelerators, which employ superconducting RF (SRF) technology. CEBAF, SNS, FRIB, ESS, among others exploit the low surface resistance of SRF cavities to efficiently accelerate particle beams towards experimental targets. Niobium is the cavity material of choice for all current or planned SRF accelerators, but it has been long recognized that other superconductors with high superconducting transition temperatures have the potential to surpass niobium for SRF applications. Among the alternatives, Nb$_{\mathrm{3}}$Sn coated cavities are the most advanced on the path to practical applications: Nb$_{\mathrm{3}}$Sn coatings on R{\&}D cavities have T$_{\mathrm{c}}$ consistently close the optimal 18 K, very low RF surface resistances, and very recently were shown to reach above H$_{\mathrm{c1}}$ without anomalous RF surface resistance increase. In my talk I will discuss the prospects of Nb$_{\mathrm{3}}$Sn SRF cavities, the research efforts to realize Nb$_{\mathrm{3}}$Sn coatings on practical multi-cell accelerating structures, and the path toward possible inclusion in CEBAF. [Preview Abstract] |
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