Sam Posen

About Sam Posen

I am a Scientist in Fermilab\'s Applied Physics and Superconducting Technology Directorate, studying superconducting RF cavities. I investigate many interesting questions relating to superconductivity and materials science- What is the maximum high frequency magnetic field that could be theoretically screened using a given- What non-fundamental mechanisms limit the achievable field in a cavity? How can these be avoided- What are the origins of the temperature-independent part of the surface resistance observed in cavity tests- What cavity preparation techniques minimize the overall surface resistance at useful gradients- Can alternative materials or layerings be used to reach higher fields and smaller surface resistances?In addition to basic research into the fundamental behavior of accelerator cavities, the Fermilab SRF team develops technologies and methodologies for assembling the cryomodules that house cavities in accelerators. Fermilab is working on two projects: the Linac Coherence Light Source (LCLS) II which will use technologies developed for TESLA in a CW free electron laser at Stanford, and the Proton Improvement Project (PIP) II which would be built at at Fermilab to supply high intensity beams for neutrino experiments.Please see my home page at http://samposen.github.io/Find my dissertation here: obtained my Ph.D. in physics performing research in Cornell University\'s SRF group under advisor Matthias Liepe, publishing a dissertation on my research into Nb3Sn SRF cavities. My undergraduate degree is in Engineering Physics from Queen\'s University in Kingston, Ontario, Canada. Engineering Physics was an appropriate degree, as I am interested in scientific research and answering some of the fundamental questions about our universe, but I also enjoy problem solving and designing and building complex machines. Accelerator Physics appeals to me as a field that can provide both.

Experience

1. Senior Scientist & Deputy Associate Lab Director

   Fermilab

   Apr 2026 — Present · Batavia, IL, US

Education

• Cornell University

  Doctor of Philosophy (PhD), Physics

  2009 — 2014

• Queen's University

  Bachelor of Applied Science (B.A.Sc.), Engineering Physics (Hons.) 1st Class

  2005 — 2009

Skills

• Programming
• Edx
• Microwave Engineering
• Superconductors
• Matlab
• Mathematica
• Ansys
• C++ Language
• Autodesk Software
• Tem
• Instrumentation
• Rf Engineering
• Research
• Xps
• Cryogenics
• Clean Rooms
• Labview
• Data Acquisition
• Sem
• Latex
• Physics
• Linux
• Cad
• Vacuum
• Maple