Awards and Fellowships
The Robert R. Wilson Prize for Achievement in the Physics of Particle Accelerators is awarded to Alexander Zholents, for many important contributions to particle accelerators and light sources, including ultra-fast X-ray techniques for electron beams and beam cooling methods.
The Ernest Courant Outstanding Paper Recognition is awarded to Pantaleo Raimondi and Simone Maria Liuzzo, for their paper “Toward a diffraction limited light source”, published in the 26th issue of Physical Review Accelerators and Beams.
The Outstanding Doctoral Thesis Research in Beam Physics Award is given to Minghao Song, for his thesis, “Advanced methods for storage ring nonlinear beam dynamics design and implementation.” Please learn more about Dr. Song here.
New APS Fellows in 2024
Giorgio Ambrosio
For outstanding leadership and technical contributions to the design, development, and construction of effective high-field focusing quadrupole magnets based on Nb3Sn technology, enabling the HL-LHC Upgrade.
S. Alex Bogacz
For the development of a broadly adopted novel coupling formalism for accelerators, its application to innovative recirculating linac designs, and leadership in high-energy recirculating linac design for ERLs, muon colliders, and CEBAF upgrades.
Sam Posen
For outstanding contributions to improving the performance of superconducting RF cavities for particle accelerators, including groundbreaking achievements in Nb3Sn superconducting cavities and the development of medium-temperature baking for niobium cavities.
Student Travel Awards
US Particle Accelerator School Student Travel Awards
Nicole Neveu, SLAC National Accelerator Laboratory, on behalf of the DPB Education and Outreach Committee
Recipients of DPB travel funds at the Summer 2024 USPAS in Rohnert Park, CA
Since 2019, the DPB has provided a scholarship program for both domestic and international students attending the US Particle Accelerator School (USPAS). This travel grant is aimed at advancing the education of newcomers in the broad spectrum of Beam Physics. The APS DPB Executive Committee and the Education, Outreach, and Diversity Committee actively promote and implement this program.
12 travel awards were granted for both the Summer 2024 and Winter 2025 sessions. These accomplished students represent a diverse array of backgrounds, contributing to the program's richness and inclusivity. For more details of the program, please refer to https://uspas.fnal.gov/dpbscholarshipdetails.pdf.
IPAC24 student travel awards
Kiersten Ruisard, Oak Ridge National Laboratory, on behalf of the IPAC Americas Region Grant Committee
The DPB annually funds student travel to IPACs and NAPACs. For IPAC’24 in Nashville, these funds directly supported the transportation and per diem expenses of 27 students. The student grant program is a long-standing and valued resource that promotes student participation at conferences, particularly when travel budgets are tight. We thank APS-DPB for their longstanding support of this program!
IPAC’24 Poster Awards
Four students were recognized for their quality of work and presentation, as evaluated during the IPAC’24 student poster session. Winners received an award of $500 as well as a copy of Andrei Seryi’s book, “Unifying Physics of Accelerators, Lasers and Plasma.” (The poster prizes were not sponsored by DPB). A photograph of the award winners can be found in “Highlights of IPAC’24.” The poster titles and abstracts for the winners are listed below:
Elena Ros, for her poster “Simulations of CXFEL with the MITHRA code”
The CXFEL project at ASU will produce coherent soft x-ray radiation at a university-scale facility. Unlike conventional XFELs, the CXFEL will use an optical undulator in addition to nanobunching the electron beam instead of a static magnetic undulator. This reduces the undulator period from cm-scale to micron scale and lowers the requirements on the electron beam energy. CXFEL’s overtaking geometry design reduces the effective undulator period to 7.86 μm to produce 1 keV photons. This is accomplished by crossing the laser and electron beam at a 30 degree overtaking angle, and using a tilted laser pulse front to maintain temporal overlap between the electron beam and laser pulse. The inverse Compton scattering interaction between a microbunched electron beam and an optical undulator falls out of the range of most accelerator codes. We employ MITHRA, a FEL full-wave FDTD solver software package which includes inverse Compton scattering to simulate the FEL lasing process. We have adapted the code to the CXFEL instrument design to simulate the radiation/electron beam interactions and report results of studies including scaling of key parameters.
Hannah Hu, for her poster “Decoupling of Nitrogen and Oxygen Impurities in Nitrogen Doped SRF Cavities”
The performance of superconducting radiofrequency (SRF) cavities is critical to enabling the next generation of efficient, high-energy particle accelerators. Recent developments have focused on altering the surface impurity profile through in-situ baking, furnace baking, and doping to introduce and diffuse beneficial impurities such as nitrogen, oxygen, and carbon. However, the precise role and properties of each impurity are not well understood. In this work, we attempt to disentangle the role of oxygen and nitrogen impurities through time-of-flight secondary ion mass spectrometry of niobium samples baked at temperatures varying from 75-800 C with and without nitrogen injection. From these results, we developed treatments recipe that decouple the effects of oxygen and nitrogen in doping treatments. Understanding how these impurities and their underlying mechanisms drive further optimization in the tailoring of impurity profiles for high performing SRF cavities.
Madison Howard, for her poster, “Optimizing current density measurements for intense low beta electron beams”
The cathode test stand at LANL is utilized to test velvet emitters over pulse durations of up to 2.5µs. Diode voltages range from 120kV to 275kV and extracted currents exceed 25A and depend on cathode size and pulse duration. Current density measurements taken with scintillators or Cherenkov emitters produce inconsistent patterns that disagree with the anticipated beam profile. Several factors contribute to the measured beam distribution, such as electron scatter, X-ray scatter, and Snell’s law. Here, we present a range of experiments designed to evaluate both electron scatter and Cherenkov emission limits in efforts to optimize current density measurements. For electron ranging studies, metal foils of different densities and thicknesses are coupled with a scintillator, which is then imaged with an ICCD. Similarly, Cherenkov emission and Snell’s law are investigated through imaging materials with differing indices of refraction over a range of beam energies. MCNP6® modeling is utilized to further guide and evaluate these experimental measurements.
Jan-Magnus Christmann for his poster, “Findings of simulation studies for the fast corrector magnets of PETRA IV”
Fourth-generation synchrotron radiation sources, which are currently being planned in several accelerator laboratories, require fast orbit feedback systems to correct distortions in the particle orbit and thus meet stringent stability requirements. Such feedback systems feature corrector magnets powered at frequencies up to the kilo-hertz range, giving rise to strong eddy currents. To understand the eddy current effects and the characteristics of these fast corrector magnets, elaborate finite element simulations must be conducted. This paper gives an overview of the most important findings of our simulation studies for the fast corrector magnets of the future synchrotron radiation source PETRA IV at DESY, Hamburg, Germany. Using a homogenization technique for the laminated yokes, we simulate the magnets over a wide frequency range. We investigate the integrated transfer function of the magnets and the phase shift between the field in the aperture and the current in the coils.We show the impact of different material choices for the yoke, of various beam pipe layouts, and of the cross-talk with the neighboring quadrupoles. By presenting a concise summary of our findings, we aim to bring valuable insights to researchers working on fast orbit feedback systems for the next generation of synchrotron light sources.
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