202 FRIB Graduate Brochure

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Peter Ostroumov Professor of Physics, FRIB Accelerator Systems Division Associate Director Keywords: Accelerator Physics, RF Superconductivity, FRIB Energy Upgrade, FRIB Multi-user Upgrade, Linear and Circular Accelerators for Radioactive Beams Accelerator Physics & Engineering About • PhD, Institute for Nuclear Research, Moscow, 1982 • Doctor of Science, Moscow Engineering Physical Institute, 1993 • Joined the laboratory in August 2016 • ostroumov@frib.msu.edu Research Particle accelerators are major tools for discovery in nuclear physics, high energy physics and basic energy science. A new national-user facility for nuclear science, FRIB is based on a state-of-the-art 400 kW superconducting linear accelerator. FRIB employs large number of accelerator physicists and engineers and attracted significant DOE funding for education of graduate students under ASET program. Currently, FRIB is approaching to the commencement of user operation. The main focus of the Accelerator Physics Department is the detailed understanding of beam physics issues in this new facility to achieve the design beam power and deliver wide selection of isotopes to the experiments. A significant innovative engineering effort will be necessary to achieve routine operation with 400 kW beam power. At the same time, research and development (R&D) for future FRIB upgrade scenarios is being pursued to enable new high-priority and high-impact research opportunities. This task requires strong communication between accelerator physicists, engineers and nuclear physicists to understand the highest priority research. The list of possible short-term and midterm accelerator R&D goals includes the development of a cost-effective option for a high energy upgrade of the FRIB driver linac which will be based on newly developed medium-beta superconducting (SC) cavities (see the photo) capable of doubling the energy of FRIB beams over the available space of 80 meters. Other R&D tasks include the development of multitarget driver linac operation with the simultaneous acceleration of light and heavy ions, and the development and implementation of techniques to increase efficiency for delivery of radioactive ion beam species to the user experiments, the post-accelerator, and their postacceleration. The long-term accelerator R&D will enable the best science in the world at an expanded FRIB which may include storage rings and a radioactive-ion-electron collider. These accelerator R&D topics open vast opportunities to involve PhD students and post-doctoral researchers. In the past 10 years I have guided a group of scientists, engineers, young researchers, students, and technicians who have developed and implemented several innovative accelerator systems such as high performance SC cavities and cryomodules, a CW RFQ with trapezoidal vane tip modulations, an EBIS for the fast and efficient breeding of radioactive ions; designed and demonstrated several new accelerating structures for ion linacs, developed and built bunch length detectors for CW ion beams, and profile and emittance measurement devices for rare-isotope beams. The photo shows the newly developed room-temperature continuous wave accelerating structure built for bunching of FRIB beams after the stripper. I eagerly look forward to applying this expertise to new and challenging technical issues with students and postdocs at FRIB. Selected Publications Efficient continuous wave accelerating structure for ion beams, P.N. Ostroumov, et al., Phys. Rev. Accel. Beams 23, 042002 – Published 8 April 2020. Beam commissioning in the first superconducting segment of the Facility for Rare Isotope Beams. P.N. Ostroumov, et al., Phys. Rev. Accel. Beams 22, 080101 – Published 7 August 2019. Elliptical superconducting RF cavities for FRIB energy upgrade, P.N. Ostroumov, et al., Nuclear Inst. and Methods in Physics Research, A 888 (2018) 53–63. Left: Niobium superconducting elliptical cavity for FRIB Upgrade to 400 MeV/u capable to provide 12.4 MV accelerating voltage. Right: High-efficient room temperature continuous wave interdigital H-type resonator for bunching of FRIB beams. 68 2022_FRIB_Graduate_Brochurev4.indd 68 10/29/2021 3:33:56 PM
Scott Pratt Professor of Physics Keywords: Relativistic Heavy Ion Collisions, QCD Computation, Phenomenology Theoretical Nuclear Physics About • PhD, Theoretical Nuclear Physics, University of Minnesota, 1985 • Joined the laboratory in October 1992 • pratt@frib.msu.edu Research My research centers on the theoretical description and interpretation of relativistic heavy ion collisions. In these experiments, heavy nuclei such as gold or lead, are collided head-on at ultrarelativistic energies at RHIC, located at Brookhaven, or at the LHC at CERN. The resulting collisions can create mesoscopic regions where temperatures exceed 1012 kelvin. At these temperatures, densities become so high that hadrons overlap, which makes it impossible to identify individual hadrons. Thus, one attains a new state of matter, the strongly interacting quark gluon plasma. The QCD structure of the vacuum, which through its coupling to neutrons and protons is responsible for much of the mass of the universe, also melts at these temperatures. Unfortunately, the collision volumes are so small (sizes of a few time 10-15 m) and the expansions are so rapid (expands and disassembles in less that 10-21 s) that direct observation of the novel state of matter is impossible. Instead, one must infer all properties of the matter from the measured momenta of the outgoing particles. Thus, progress is predicated on careful and detailed modeling of the entire collision. Modeling heavy-ion collisions invokes tools and methods from numerous disciplines: quantum transport theory, relativisitic hydrodynamics, non-perturbative statistical mechanics, and traditional nuclear physics—to name a few. I have been particularly involved in the development of femtoscopic techniques built on the phenomenology of two-particle correlations. After their last randomizing collision, a pair of particles will interact according to the well-understood quantum two-body interaction. This results in a measurable correlation which can be extracted as a function of the pair’s center of mass momentum and relative momentum. Since the correlation is sensitive to how far apart the particles are emitted in time and space, it can be used to quantitatively infer crucial properties of the space-time nature of the collision. These techniques have developed into a field of their own, and have proved invaluable for determining the space-time evolution of the system from experiment. I have also developed phenomenological tools for determining the chemical evolution of the QCP from correlations driven by charge conservation. These correlations, at a quantitative level, have shown that the quark content of the matter created in heavy-ion collisions at the RHIC or at the LHC indeed have roughly the expected densities of up, down and strange quarks. Other work has included transport tools, such as hydrodynamics and Boltzman distributions, as applied to relativistic collisions, and methods for exact calculations of canonical ensembles with complicated sets of converted charges. From 2009 through 2015, I was the principal investigator for the Models and Data Analysis Initiative (MADAI) collaboration, which was funded by the NSF through the Cyber-Enabled Discovery and Innovation initiative. MADAI involves nuclear physicists, cosmologists, astrophysicists, atmospheric scientists, statisticians and visualization experts from MSU, Duke, and the University of North Carolina. The goal is to develop statistical tools for comparing large heterogenous data sets to sophisticated multi-scale models. In particular, I have worked to use data from RHIC and the LHC to extract fundamental properties of the matter created in high-energy heavy-ion collisions. Selected Publications Determining Fundamental Properties of Matter Created in Ultrarelativistic Heavy-Ion Collision, J. Novak, K. Novak, S. Pratt, C. Coleman-Smith, R. Wolpert, arXiv:1303.5769 (2013) Identifying the Charge Carriers of the Quark-Gluon Plasma, S. Pratt, Physical Review Letters, 108, 212301 (2012) Resolving the HBT Puzzle in Relativistic Heavy-Ion Collisions, S. Pratt, Physical Review Letters 102, 232301 (2009) 69 2022_FRIB_Graduate_Brochurev4.indd 69 10/29/2021 3:33:56 PM
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FACILITY FOR RARE ISOTOPE BEAMS GRA
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Contents Director’s welcome......
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Director’s welcome Why do atoms e
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A research associate and physicist
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FRIB features Unprecedented discove
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Other tools and resources • FRIB
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JINA-CEE Michigan State University
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ASET graduate student works with an
Page 17 and 18: What is cryogenic engineering? Cryo
Page 19 and 20: Accelerator physics Students in acc
Page 21 and 22: Fun and friendship The graduate stu
Page 23 and 24: Women and Minorities in the Physica
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Page 33 and 34: The Lansing area Capital city Lansi
Page 35 and 36: The campus The East Lansing campus
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Page 39 and 40: Daniel Bazin Research Senior Physic
Page 41 and 42: Georg Bollen University Distinguish
Page 43 and 44: Edward Brown Professor of Physics K
Page 45 and 46: Kaitlin Cook Assistant Professor of
Page 47 and 48: Pawel Danielewicz Professor of Phys
Page 49 and 50: Venkatarao Ganni Director of the MS
Page 51 and 52: Yue Hao Associate Professor of Phys
Page 53 and 54: Morten Hjorth-Jensen Professor of P
Page 55 and 56: Pete Knudsen Senior Cryogenic Proce
Page 57 and 58: Steven Lidia Senior Physicist and A
Page 59 and 60: Steven Lund Professor of Physics Ke
Page 61 and 62: Kei Minamisono Research Senior Scie
Page 63 and 64: Fernando Montes Research Staff Phys
Page 65 and 66: Witek Nazarewicz University Disting
Page 67: Brian O’Shea Professor of Computa
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Page 73 and 74: Gregory Severin Assistant Professor
Page 75 and 76: Jaideep Taggart Singh Associate Pro
Page 77 and 78: Andreas Stolz Professor, Operations
Page 79 and 80: Jie Wei Professor of Physics, FRIB
Page 81 and 82: Yoshishige Yamazaki Professor of Ph
Page 83 and 84: Vladimir Zelevinsky Professor of Ph
Page 85 and 86: How to Apply Now that you’ve read
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202 FRIB Graduate Brochure

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