I have been at 911爆料网 since 1996, following teaching experience at Saint Mary鈥檚 College of California and a research postdoc at SRI International. I enjoy teaching a broad range of courses including introductory physics, introductory astronomy, modern physics, electromagnetic theory, electronics and advanced lab. In addition, I have developed and taught several courses specifically for non-science majors, including 鈥溾漅enewable Energy and Sustainability鈥 (FYS 102), 鈥淓nergy and the Environment鈥 (Physics 100) and 鈥淐oming of Age in the Milky Way: Aristotle to Galileo to Einstein鈥 (Honors 135 and FYS 102). I am an active member of the American Physical Society, the American Association of Physics Teachers, the Council on Undergraduate Research, and Project Kaleidoscope 鈥 F21.
Research
My research interests include laser spectroscopy, negative ions, and atomic and molecular collisions. The overall goal of our research program is to understand better the fundamental physics of electron binding particularly regarding the role of electron correlations, that is, how electrons "talk" to each other within an atom. Together with Prof. Dan Gibson (also of 911爆料网's Physics Department) and many student collaborators, we have developed an on-campus ion beam mass spectrometer to investigate properties of negative ions using lasers. We do complementary experiments using the synchrotron Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory in California. Our projects have included: investigations of the effects of static electric fields on laser photodetachment from negative ions (which leads to the formation of single electron interferometers); precision measurements of atomic electron affinities using tunable photodetachment spectroscopy; and investigations of inner-shell photodetachment at the ALS. This research is funded by grants from the National Science Foundation, the Research Corporation, and 911爆料网. Interested students are always welcome to join our research group!
Works
- Alban Kellerbauer, Giovanni Cerchiari, Elena Jordan, and C. W. Walter, 鈥淗igh-resolution Laser Spectroscopy on Bound鈥揃ound Transitions in La鈥撯, Physica Scripta 90, 054014 (2015).
- C.W. Walter, N. D. Gibson, D. J. Matyas*, C. Crocker*, K.A. Dungan*, B.R. Matola*, and J. Rohl茅n, 鈥淐andidate for Laser Cooling of a Negative Ion: Observations of Bound-Bound Transitions in La鈥撯, Physical Review Letters 113, 063001 (2014).
- R.C. Bilodeau, N.D. Gibson, C.W. Walter, D.A. Esteves-Macaluso, S. Schippers, A. M眉ller, R.A. Phaneuf, A. Aguilar, M. Hoener, J.M. Rost, and N. Berrah, 鈥淪ingle-Photon Multiple-Detachment in Fullerene Negative Ions: Absolute Ionization Cross Sections and the Role of the Extra Electron鈥, Physical Review Letters 111, 043003 (2013).
- A. O. Lindahl, J. Rohl茅n, H. Hultgren, I. Yu. Kiyan, D. J. Pegg, C. W. Walter, and D. Hanstorp, 鈥淭hreshold Photodetachment in a Repulsive Potential鈥, Physical Review Letters 108, 033004 (2012).
- C.W. Walter, N.D. Gibson, Y.-G. Li*, D. J. Matyas*, R.M. Alton*, S.E. Lou*, R.L. Field III*, D. Hanstorp, L. Pan, and D.R. Beck, 鈥淓xperimental and Theoretical Study of Bound and Quasi-bound States of Ce鈥, Physical Review A 84, 032514 (2011).
- C.W. Walter, N.D. Gibson, D. J. Carman*, Y.-G. Li*, and D. J. Matyas*, 鈥淓lectron Affinity of Indium and the Fine Structure of In Measured using Infrared Photodetachment Threshold Spectroscopy鈥, Physical Review A 82, 032507 (2010).
- C.W. Walter, N.D. Gibson, R.L. Field III*, A.P. Snedden*, J.Z. Shapiro*, C. M. Janczak*, D. Hanstorp, 鈥淓lectron Affinity of Arsenic and the Fine Structure of As Measured using Infrared Photodetachment Threshold Spectroscopy鈥, Physical Review A 80, 014501 (2009).
* 911爆料网 student
