World leading research and discoveries in the field of rare isotope science require full power operation of FRIB. Operating FRIB at its full power requires a fully functional high power driver accelerator and state-of-the-art scientific equipment for production, separation, selection, charge breeding and acceleration of rare isotopes. Achieving the design goals of FRIB and further enhancement of its capabilities requires performance at the forefront of accelerator science and technology. The FRIB driver accelerator is now entering the beam commissioning stage which comes with numerous research opportunities in accelerator physics and technology. Past experience with commissioning large and unique accelerators shows that a variety of unique technical challenges must be addressed, during the installation and commissioning of major accelerator components, such as: high intensity ion sources, radio-frequency quadrupole accelerator, high-power strippers, superconducting cavities and cryomodules, beam diagnostics tools. A detailed understanding of beam physics issues coupled with SRF and other FRIB accelerator technologies is crucial for achieving the design beam power and delivery of wide selection of isotopes to the experiments. After the initial commissioning of the FRIB accelerator for operations at the design energy, a significant and innovative engineering effort may be necessary to achieve routine operation with 400 kW beam power.
Now is the right time to begin R&D for future FRIB upgrade scenarios, enabling 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 mid-term accelerator R&D goals includes the development of a cost-effective option for a high energy upgrade of the FRIB driver linac. This requires a detailed study of beam dynamics in the driver linac and the development of several options for SC cavities and cryomodules. These efforts will allow for the selection of the most cost-effective upgrade path. Other tasks which will be pursued are the development of multi-target driver linac operation with the simultaneous acceleration of light and heavy ions; development and implementation of techniques to increase efficiency for both delivery of radioactive ion beam species to the post-accelerator and their post-acceleration. The long-term accelerator R&D will enable the best science in the world at an expanded FRIB. Another area of research is the development of ion accelerator applications for medicine and industry. Accelerator R&D topics listed above open vast opportunities to involve PhD students and post-doctoral researchers.
My whole career, which begun in the Institute for Nuclear Research in Moscow working on high power proton accelerators, is devoted to the field of accelerator science and technology. In 1999, I moved to ANL for the development of a Rare Isotope Accelerator project. My early work at ANL was related to the development and demonstration of the concept for simultaneous acceleration of multiple charge states of heavy ions in a superconducting linac. In addition, the concept for acceleration of two charge-states at low energies from the ion source was demonstrated with excellent performance in a prototype setup as shown in the figure below. In the past 7 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 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. I eagerly look forward to applying this expertise to new and challenging technical issues with students and post-docs at FRIB.
Selected PublicationsP.N. Ostroumov, A. Barcikowski, C. Dickerson, B. Mustapha, A. Perry, S. Sharamentov, R. Vondrasek, and G. Zinkann, Off-line Commissioning of EBIS and Plans for Its Integration into ATLAS and CARIBU, Rev. Sci. Instrum. 87, 02B506 (2016); http://dx.doi.org/10.1063/1.4935016
Z.A. Conway, M.P. Kelly and P.N. Ostroumov, Advanced low-beta cavity development for proton and ion accelerators, Nucl. Instrum. Methods Phys. Res. B 350, 94 (2015).
P.N. Ostroumov and F. Gerigk, Superconducting Hadron Linacs, Reviews of Accelerator Science and Technology, January 2013, Vol. 06, pp. 171-196.