In his last run on COBRA he tested the possibility of getting faraday rotation measurements of the azimuthal magnetic field distribution in our gas puff z-pinches. While still working on some of the analysis, here is a picture that confirms we are seeing faraday rotation. For the images with -5 degree selection angle, the left side of the pinch darkens as the polarized laser light rotates towards the extinction angle while the right side brightens. Flipping the selection polarizer angle, we see that the dark side is now on the right side of the pinch.
Sophia will be working in Andrea Schmidt’s group, which is in the National Security Engineering Division of the Engineering Directorate. Sophia will be working on diagnostics (primarily neutron diagnostics, as well as potentially Thomson scattering and spectroscopy) for a dense plasma focus (DPF) on the pulsed-power machine MJOLNIR. The DPF is being developed as a source for neutron radiography. Congratulations Sophia!
LPS Graduate Students create a Plasma Physics Reading Club. Each week a student volunteers to lead a discussion on a plasma physics related article (or textbook sections) of his or her choice. We hope to promote scholarship and exchange of ideas in plasma physics and also just catch up on what others have been working on in the lab. Exampls so far since the club was established are;
Field reversed configurations (review article by Tuszewski)
Thomson scattering (sections in Principles of Plasma Diagnostics textbook)
Plasma transport (review article by Braginskii)
Axial magnetic flux separation (paper by Prof. Charles Seyler – full title: Axial magnetic flux amplification in Hall-magnetohydrodynamic simulations of externally magnetized z-pinches)
Big shout out to Tommy Hentschel for passing his A exam.
Ahmed is in the process of loading the XP machine with the Hybrid X-pinch electrodes. The current work is focused on time resolved source size measurement under high magnification using a fast sweep streak camera.
Sander is working to fully characterize the imploding plasma sheath in triple nozzle gas-puff z-pinches using Thompson scattering, Zeeman polarization spectroscopy, laser shearing interferometry, and Bdot probe array measurements. Such measurements will be extremely useful for validating simulation codes and should help to explain the different instability growth rates that have been observed for different gas species and initial fill densities.
Princeton Plasma Physics Laboratory Graduate Summer School
They welcomed students from a broad range of fields: magnetic fusion energy sciences, high energy density plasmas, astrophysics, low temperature plasmas, materials science, etc. Euan attended 4 lectures each of mini-courses on Turbulence, Computational Plasma Physics, and Low Temperature Plasmas, presented at a graduate poster session, attended an undergraduate poster session, and had a graduate plasma student networking session.
XUV emission of an exploding 25 μm diameter copper wire connected in series to two magnetic field coils on the two ends driven by a COBRA current pulse. This shot is a part of a study on the dynamics of the wire plasma in a magnetic mirror configuration
Fusion Day on the Hill is science advocacy event aimed at educating Members of Congress about the state of fusion research throughout the country.
Last month, Cornell partnered with the University of Rochester and New York University to visit the New York delegation. Cornell was represented by Sophia Rocco, Ph.D. student in the Laboratory of Plasma Studies.
“Professors, researchers, students and representatives from start-ups come together in Washington, D.C.,” Rocco explained, “to meet with policymakers and get them excited about the importance of fusion energy and how vital it will be to the energy security of the planet.”
Specifically, they asked for a $715 million increase to the budget of the Office of Fusion Energy Science (FES), a branch of the Department of Energy. While over the past three years that budget has been steadily increased, the current proposed national budget slashes the FES allocation by 30%.
“The best thing we can bring is our enthusiasm for our research and our excitement about fusion energy,” Rocco said.
Cornell’s Office of Federal Relations coordinated Rocco’s meetings with policymakers, including the offices of Rep. Paul Tonko (D-NY-20), Rep. Joe Morelle (D-NY-25), Rep. Tom Reed (R-NY-23), Rep. Grace Meng (D-NY-06), Senator Kirsten Gillibrand (D-NY), and Senator Chuck Schumer (D-NY).
“Everyone was very enthusiastic to speak with us,” Rocco said. “They had lots of questions about the research being done at each of the universities.” The hope was to get Members of Congress to sign a letter asking for the increased fusion budget.
Rocco came away from the day feeling very optimistic about both the impact the group made and the state of fusion energy research as it is today. Fusion energy start-ups have been attracting more investors in recent years, and along with the research being done, fusion is finally getting the kind of resources it needs to be successful.
David Hammer and E. Sander Lavine attend first ZNet Workshop
- Pulsed power technology
- Magneto inertial fusion
- Astrophysical plasmas and planetary science
- Mid scale User Facility
- MHD and hybrid codes development
- Magnetized high-energy density plasmas
- Student training opportunities