Princeton Gamma Tech - new digital imaging
Augustana has a CamScan Series 4 scanning electron microscope. Here is the operation checklist. It was obtained as a gift from the Los Alamos National Laboratory Educational Equipment Gift Program. It arrived in three large crates in June, 2002, and was assembled by a CamScan engineer in July, 2002. The SEM was new in 1989 but it still works great. It has a number of features not found on the previous Etec SEM.
Using money provided by the Science Endowment Fund, the SEM was upgraded in July, 2003 by adding a Princeton Gamma-Tech Avalon system. It includes both digital imaging and energy dispersive x-ray analysis. We also purchased a new computer, color printer, and comfortable chairs. The noisy fore pump and water cooler are located on the other side of a wall making for a pleasant lab environment.
The controls are very simple, it has a motorized sample stage, and screen images are digitized and transferred to the adjacent computer. For the first 16 months, a tungsten filament was used for the source of electrons. On Dec. 2, 2003 we installed a new LaB6 filament. It requires a better vacuum and provides brighter and sharper images.
Two experiments that use the new machine are now performed by all the students in PH 352, Advanced Lab III. Kyle Minch, a junior majoring in biology, did an independent study project using the SEM in the 2003-2004 winter term. Students in CH 403 have been doing an experiment using the SEM in the spring term.
Here are some images from the SEM. These were all taken in October, 2002. Click on the photos to see larger images.
Here is a set of close-up photos used in connection with the upgrade.
Last update: April 24, 2007