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Eva Rissanen
Appalachian State University
NIST Research Intern
National Institute of Standards and Technology (NIST)
Final presentation
Eva Rissanen - Final Presentation.pdf
Abstract:
Measuring a small-scale capacitor from the bottom of a cryostat with a large parasitic capacitance can prove to be tricky! Most electronics are designed to function at temperatures ranging from 280 to 300 Kelvin, so it is essential, as science looks to space, to know how the physical properties and functions of circuits change once subjected to cryogenic temperatures. A small circuit chip containing several capacitors in the pico-farad to nano-farad scale was developed for this project. The voltage drop of each capacitor was measured using a time and frequency domain at room temperature, then again at a temperature of 4 Kelvin. Results concluded that the capacitance decreases in cryogenic environments. By quantifying the changes in many minuscule capacitors from warm to very cold, this project will help future endeavors in building larger scale cryoelectronics.
I am currently a sophomore attending Appalachian State University in Boone, North Carolina. My major is Physics with a concentration in Astronomy. I am a member of our school's PandA Club, which is how I learned about SPS. I have also recently been appointed as an officer of our PandA Club chapter. Since the start of Freshman year, I have worked in the Physics Department. I help out with setting up general physics labs, and I grade assignments for other physics classes. Currently, I'm interested in studying space, but optics and circuits are also very interesting to me! I plan on attending graduate school in physics once I graduate with my Bachelor's degree.
Before applying to college, I was torn between majoring in Chemistry or Physics, but my high school physics teacher showed me how awesome physics could be, and how physics is involved in pretty much everything we see and do. I particularly love how it combines math and science. I love both subjects and I will likely minor in Math. Since starting school at App State, I've fallen in love with physics and I'm really excited to learn even more about it during my time as a NIST Intern this upcoming summer.
Outside of school, I love to read, cook, exercise, and spend time with my friends!