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2011+Lab+Guide+MSE104 - MSE 104 Lab Guide MSE 104...

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MSE 104 Laboratory Guide Prologue The experiments conducted in the laboratory segment of MSE 104 provide “hands-on” instruction in the most common methods of materials characterization by diffraction, spectrometry, and microscopy. Students master x-ray analytical techniques applied to powder, polycrystalline, and single crystalline samples, before their introduction to electron microscopy in both scanning (SEM) and transmission (TEM) modes, the former equipped with an energy dispersive spectrometer. All participants are encouraged to develop a “notebook habit” in this class, recording experimental data in laboratory notebooks, along with accurate and copious notes explaining sample characteristics, data collection and all relevant observations that could affect interpretation. Choose a bound (not loose-leaf) notebook with a durable cover, and begin each entry with the date and time. A neat and well-organized notebook simplifies the preparation of your laboratory report (see below). Caution Required in the Laboratory Experiments conducted in this laboratory employ hazardous radiation. X-rays can damage biological tissue in many ways, from genetic mutation at low doses to cellular destruction at high doses. It is important to completely avoid exposure to the primary beam of x- rays emanating from the source as well as any secondary sources such as scattering from specimen holders used in the experiments. The manufacturers have taken great care to shield all possible sources of primary and secondary x-rays in the diffractometer, and the laboratory is monitored by the Campus Radiation Safety Officer, but you must also act responsibly when the beam is on. Never attempt to defeat any automatic shutter mechanisms that cut power to the x-ray tube. If ever in doubt about your safety, shut down the power and consult with your instructor. MSE 104 Lab Guide page 1 of 6
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Dosimetry Your x-ray ring “dosimeters” do not protect you from harm; as their name suggests they act as a primitive "meter" of "dose" as another diagnostic check on system radiation leaks. To participate in the laboratory, you must wear a dosimeter ring; no one will be permitted to use the laboratory without a personal dosimeter. Please wear your rings during the laboratory and return them to the storage cabinet at the end of each lab session. The periodic
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2011+Lab+Guide+MSE104 - MSE 104 Lab Guide MSE 104...

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