Post Doctoral Fellow Accelerate NbSn

At Jefferson Lab,you'llchampioncutting-edge science and operational excellence while shaping the future of discovery. Join us and make your mark - where excellence meets purpose, andgreat mindstruly
matter.

The good-faith pay range for this role is $65,600 - $90,300 per year. Actual compensation may vary and may be above the posted range based on factors such as a candidate's skills, experience, education, certifications, and work location.

JSA will not sponsor an H1B visa for this position.

Thomas Jefferson National Accelerator Facility (JLAB) has a long-standing program for the development of alternate superconducting Radio frequency (RF) surfaces based on thin film technologies. Encouraging results have been obtained for niobium (Nb) and Nb3

Sn thin films on small laboratory samples produced by conventional PVD and energetic condensation (HiPIMS, ECR post-ionization) techniques. The development is pursued with the optimization of substrate preparation, interlayers, insulating layers, thermal treatment, target composition on small samples. RF performance is to be evaluated on simplified geometry in a quadrupole resonator (QPR) and on elliptical RF resonators (single-cell cavities). In parallel, characterization by microscopy (SEM, TEM), diffraction (XRD, EBSD), spectrometry (EDS, XPS, SIMS, AES, EELS), magnetometry and other cryogenic measurements (3rd harmonic, RRR, PCT) is done both in house and in collaboration with external institutes.

The JLab Superconducting radio frequency (SRF) research department seeks a Postdoctoral Research Associate to take part in its thin film programs and particularly focus on developing the deposition of Nb3

Sn on copper (Cu) primarily in the framework of compact accelerators. With guidance, the Post-doctoral Fellow will conduct research on A15 superconducting materials and associated buffer layer deposition to prevent Cu diffusion for application to compact accelerators. In particular, the incumbent is responsible for developing and optimizing a method to achieve the sought-after phases and structures by leveraging energetics to enable deposition of Nb3

Sn at lower temperatures than usually possible with conventional methods. These activities also include working with surface analytical tools like SEM combined with EBSD and EDS, TEM/EELS, SIMS, and XPS. The incumbent will also work closely with the principal investigator, staff and graduate students to conduct RF evaluation at cryogenic temperatures of SRF film structures coated on QPR samples to evaluate results, which guide the optimization of deposition methods, leading to implementation of the technology on elliptical single-cell cavities, and to write reports in the form of technical notes, conference proceedings and/or peer reviewed journals.

• Assist in deposition of Nb3
  
  Sn thin film and structures, characterize samples and devices using microscopes, physical property system and magnetometry setups, and prepare and mount samples for these experiments.
• Participate in analyzing the microstructure and properties of superconducting films and structures generated within the SRF S&T Department
• Participate in the installation and commissioning of an upcoming cylindrical magnetron deposition setup
• Determine solutions to technical problems by reviewing scientific and technical literature and simulation methodologies designing and executing experiments to support research. Conduct, analyze, and present data.
• Presents scientific conclusions at internal and external meetings, in technotes, proceedings and/or peer-reviewed journals.
• Collaborate with scientists, engineers, and technicians to accomplish research goals.

• Required:
  
  Strong background in surface & thin film science with experience in one or more of the techniques mentioned above and be willing to use experimental background to crossover into the field of accelerator physics and microelectronics.
• Required:
  
  Experience with cryogenic and/or RF measurements.
• Required:
  
  Experience with experimental setups for superconducting measurements
• Preferred:
  Experience with thin film deposition techniques.
• Preferred:
  Experience in calculations and/or simulations regarding the particle interactions in matter, especially experience with Mat Lab, COMSOL or PIC/MC software.

• Required:
  
  Ph.D. Physics, Applied Physics, Superconducting RF, Material Science. etc.

Education above the minimum may not be substituted for experience.…