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Анализ чувствительности метода по проверке эквивалентности инертной и гравитационной масс нейтрона кристалл-дифракционным методом

магистерская диссертация

Анализ чувствительности метода по проверке эквивалентности инертной и гравитационной масс нейтрона кристалл-дифракционным методом

Abstract

Работа посвящена определению влияния радиационного нагрева кристалла на точность эксперимента по проверке принципа эквивалентности для нейтрона, а также выбору оптимальной конфигурации экспериментальной установки. Анализ включает в себя разработку стратегии моделирования, алгоритмов и программ расчета радиационного нагрева кристалла в следствии прохождения через него пучка нейтронов, а также градиентов температур, определение деформации кристалла и формулировку на их основе предложений по оптимизации установки в целом. В качестве основного метода выполнения настоящей работы использовалось численное моделирование, основанное на современном пакетах ELCUT и COMSOL Multiphysics. Результаты работы позволяют дать ответ на вопрос о влиянии радиационного нагрева кристалла на точность эксперимента по проверке принципа эквивалентности для нейтрона, получить количественные оценки этого влияния на точность эксперимента и выбрать оптимальную конфигурацию экспериментальной установки.

The work is devoted to determining the effect of radiation heating of a crystal on the precision of the experiment to test the equivalence principle for the neutron, as well as the choice of the optimal configuration of the experimental setup. The analysis includes the development of strategy of simulation, modeling algorithms and programs of calculation of radiation heating of the crystal in the result of the passage through it of a beam of neutrons, as well as the temperature gradients, the determination of the deformation of the crystal and the formulation on their basis proposals to optimize the whole setup. As the main method of execution of the present work, the numerical modeling based on modern packages ELCUT and COMSOL Multiphysics was used. The results of the work answering the question about the influence of radiation heating of a crystal on the precision of the experiment, allow to test the equivalence principle for the neutron and to obtain an estimation of this influence on the accuracy of the experiment and to choose the optimal configuration of the experimental setup.

Keywords

Дифракция, Laue diffraction, equivalence principle, Нейтроны, принцип эквивалентности, дифракция по Лауэ, Кристаллы, Моделирование

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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