Dynamic Transmission Electron Microscopy

Integrated Dynamic Electron Solutions
2014–15

Integrated Dynamic Electron Solutions manufactures dynamic transmission electron microscopes that observe samples at high spatial and temporal reso- lution by using a pulsed laser and a high-voltage electron beam. Currently, it is extremely difficult to align the excitation laser pulse with the electron beam inside the microscope. The goal of this project is to develop a method to mon- itor alignment of the two beams to roughly 10-μm resolution and to measure the spatial profile and intensity of the laser pulse at the sample plane. To this end, the Harvey Mudd College Clinic team created two design alternatives: the sensor-in-vacuum design and the borescope-phosphor design. The first design uses a sensor directly in the beam path to image the beams, while the second design uses a borescope to image the glow of a phosphor excited by the beams. The team pursued both designs and tabled the sensor-in-vacuum design given the time constraint of the project. The team further pursued the borescope- phosphor design and, after thorough testing, made a final prototype that successfully images a laser profile.

Advisor(s): Peter N. Saeta.

Team: Jessica Iwamoto ’16, Paul Jolly ’16, Kirklann Lau ’16, Ashuka Xue ’16, Zeph Arvanitis ’15, Allison Mis ’15, and <span class="eng"Jacqueline L. Ong '15.