Publications by authors named "Damon English"
Deflectometric profilometers are used to precisely measure the form of beam shaping optics of synchrotrons and X-ray free-electron lasers. They often utilize autocollimators which measure slope by evaluating the displacement of a reticle image on a detector. Based on our privileged access to the raw image data of an autocollimator, novel strategies to reduce the systematic measurement errors by using a set of overlapping images of the reticle obtained at different positions on the detector are discussed.
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- Time measurements have historically relied on the movements of particles and celestial bodies, with recent advancements in relativity and quantum mechanics allowing for precise definitions based on individual particles.
- A new clock design using an optical frequency comb and a Ramsey-Bordé atom interferometer enables synchronization to a specific frequency tied to a particle's mass, facilitating precise mass measurements.
- This method achieves an accuracy of 4 × 10(-9) for microscopic masses and helps redefine the kilogram based on modern scientific standards.