Hydrogen Fine Structure with Doppler-free Laser Absorption Spectroscopy
University of Washington, Seattle, July 6-8, 2018
All essential materials and equipment will be provided, but participants are encouraged to bring a camera (cellphone OK) and computer/notebook to record notes and results. If the participant has a favorite data analysis package, that will be useful during the lab.
Safety considerations. There are a few hazards in this experiment: a high-voltage power supply gas discharge lamp; UV radiation from discharge tube, hydrogen gas, and a medium-power (5-10 mW) laser (Class IIIb). Instruction will be provided concerning these risks.
As noted, this experiment is one of the most advanced in our department, and the components are not cheap or simple to obtain. Our setup was mostly completed in 2000, so the following prices are at best a rough guide.
Host and Mentor:
David Pengra, after a short career as an electric equipment repairman and radio engineer, received his PhD in condensed matter experimental physics at the University of Washington in 1991, working under Greg Dash on the thermodynamics of low-temperature adsorbed films. He then completed two post-docs, the first with Jakob Bohr in Denmark on resonant magnetic x-ray diffraction from rare-earth crystals, and the second with Po-zen Wong at the University of Massachusetts, Amherst, on electrokinetics and fluid flow in porous media. He joined the faculty of Ohio Wesleyan University in 1996, where he continued his work in porous media and taught physics, specializing in advanced laboratory courses and electronics. David returned to the University of Washington in 2003, where he teaches laboratory courses at all levels and manages the department's advanced teaching laboratories, which include courses in analog and digital electronics, computer interfacing, optics, condensed matter physics, atomic and molecular physics, and nuclear and particle physics. During his time at Washington, he has also been deeply involved in revising the laboratory curriculum for the introductory physics sequence. David enjoys the wide range of physics he gets to think about and teach in the laboratory courses, and he especially likes to help students learn the skills, craft and techniques of experimental physics.
David B. Pengra, Senior Lecturer in Physics / Advanced Labs Manager, University of Washington, Department of Physics, Physics/Astronomy Building, Box 351560, University of Washington, Seattle, WA 98196-1560. Email: email@example.com. Phone: (206) 543-4783.
Please note that the Jonathan F. Reichert Foundation has established a grant program to help purchase apparatus used in Laboratory Immersions. Limitations and exclusions apply, but generally speaking the foundation may support up to 40% of the cost of the required equipment.