Using a Quartz Crystal Oscillator as a Deposition Monitor
-Robert Wild, Spring Semester 2003
Supervised by Alex Cronin, University of Arizona Department of Physics
Supervised by Alex Cronin, University of Arizona Department of Physics
Problem
The problem that brought about the need for this project was that we did not know how efficient the atom detector is. Thus, it was unknown whether it is worth trying to improve the detector efficiency to achieve a larger atom count rate.
Solution
The method to do this was to use a quartz crystal as a microscale that measures the mass of atoms deposited onto it. The measured flux could then be extrapolated to the position of the detector, and compared to the readings of the latter for a total efficiency.
Result
The detector has an efficiency of about 3% to 4%.