July 2018 Issue, Volume 86, No. 7July 2018 AJP TOC


Improved microparticle electrodynamic ion traps for physics teaching

We review the essential physics of microparticle electrodynamic ion traps (MEITs) and suggest several improvements in the design, construction, and application of MEITs in undergraduate physics teaching. Pulling together insights gleaned from a number of disparate sources, we have developed MEITs with better overall performance and reliability in comparison to previous publications. This work builds upon a long history of MEIT advancement over many decades, further lowering the barriers to using these fascinating devices in physics teaching labs and demonstrations.




A call for more video abstracts by David P. Jackson. DOI: 10.1119/1.5039339


Spherical aberration, coma, and the Abbe sine condition for physicists who don't design lenses by Alex Small. DOI: 10.1119/1.5036939

Blackbody radiation in classical physics: A historical perspective by Timothy H. Boyer. DOI: 10.1119/1.5034785

A simple game simulating quantum measurements of qubits by Theodore A. Corcovilos. DOI: 10.1119/1.5036620

An asymmetric isochronous pendulum by Juan M. Randazzo, S. A. Ibáñez, and J. M. Rosselló. DOI: 10.1119/1.5036627

An experimental demonstration of avoided crossings with masses on springs by Andrew B. Lockhart, Alexandria Skinner, William Newman, Daniel B. Steinwachs  more.... DOI: 10.1119/1.5036752

Physics Education Research

A comparison of student evaluations of instruction vs. students' conceptual learning gains by LaDoris J. Lee, Manju E. Connolly, Melissa H. Dancy, Charles R. Henderson more.... DOI: 10.1119/1.503933

Back of the Envelope

Making Fermi estimates by tapping the vast knowledge in our gut by Sanjoy Mahajan. DOI: 10.1119/1.5040578

Apparatus and Demonstration Notes

Improved microparticle electrodynamic ion traps for physics teaching by Kenneth G. Libbrecht, and Eric D. Black. DOI: 10.1119/1.5034344

A flexible positron spectrometer for the undergraduate laboratory by Jason Engbrecht, and Nathaniel Hillson. DOI: 10.1119/1.5038672

Book Reviews

Mathematical Methods in Engineering and Physics by Christine Aidala. DOI: 10.1119/1.5029824

Books Received

American Journal of Physics 86, 560 (2018); https://doi.org/10.1119/1.5040259


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