Donald L. Hartill, Cornell University
Professor
Ithaca, New York
dlh13@cornell.edu
Office:
(607) 255-8787
Expert In
Bio/Research
My research activities are primarily focused on accelerator physics. Beam size measurements using optical synchrotron radiation are the main activities that I am working on at the moment. This involves using a combination of double slit interferometry and taking advantage of the phase reversal ...
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Bio/Research
My research activities are primarily focused on accelerator physics. Beam size measurements using optical synchrotron radiation are the main activities that I am working on at the moment. This involves using a combination of double slit interferometry and taking advantage of the phase reversal of the electric field vector in the horizontal plane for vertically polarized synchrotron radiation. The depth of the intensity minimum is a very sensitive way to measure small vertical beam sizes. This is part of the CesrTA program. In addition, I am working with our superconducting RF group currently led by Prof. Georg Hoffstadter in developing high gradient superconducting RF cavities suitable for use in an electron positron linear collider. I have developed a technique based on second sound in superfluid helium to locate the site when the quench occurs in these cavities when they are driven to very high gradients. An array of sixteen tranducers can locate the quench site to a few millimeters. This is more accurate and very much simpler than the thermometer arrays used in the past involving many hundreds of thermometers limited to only two cells of a multi-cell cavity. Research Scientists Mingqi Ge and Andriy Ganshyn are working with me on this program. Recently, we have received funding to continue our program on low frequency superconducting RF cavities (200 MHz) suitable for muon beam acceleration. One graduate student would be welcome to participate in either of these programs.
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