Honors Theses and Capstones

Date of Award

Spring 2023

Project Type

Senior Honors Thesis

College or School

CEPS

Department

Department of Physics and Astronomy

Program or Major

Physics, Russian

Degree Name

Bachelor of Science

First Advisor

Charles Smith

Second Advisor

Ekaterina Burvikova

Abstract

We surveyed magnetic field data from the Ulysses spacecraft and found examples of magnetic waves with characteristics that point to excitation by newborn pickup He+. With interstellar neutrals as the likely source for the pickup ions, we have modeled the ion production rates and used them to produce wave excitation rates that we compare to the background turbulence rates. The source ions are thought to be always present, but the waves are seen when growth rates are comparable to or exceed the turbulence rates. With the exception of the fast latitude scans, and unlike the waves excited by newborn interstellar pickup H+, the waves are seen throughout the Ulysses orbit.

Были использованы наблюдения магнитного поля из магнитометра на спутнике Улисс чтобы найти примеры низкочастотных магнитных волн в результате рассеивания ионов гелия, которые называются pickup ions (PUIs). Считается, что всегда есть волны, но они только видны, когда скорость роста волновой энергии больше, чем турбулентность. Гелиевые волны были измерены по всей орбите Улисса.

Comments

A summary of this thesis was translated into Russian as a part of a major in Russian, and can be found at the end of the document before the references.

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