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Measuring the energy spectra of unknown samples using coherent control of the complex phase of X-rays


Herkommer,  Benedikt
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Herkommer, B. (2019). Measuring the energy spectra of unknown samples using coherent control of the complex phase of X-rays. Master Thesis, Ruprecht-Karls-Universität, Heidelberg.

Cite as: https://hdl.handle.net/21.11116/0000-0005-A48B-5
The field of quantum optics describes the interaction of electromagnetic radiation
with matter whereby both are described quantum mechanically. So far the used
frequencies of the radiation, were restricted to the operation range of lasers, which
is between microwave to ultraviolet radiation. With the availability of new radiation
sources such as sychrotrons, the field of X-ray quantum optics could be established.
The high energy of the X-rays offer new possibilities, such as the examination of the
interaction of radiation the nuclei of atoms. Unfortunately, X-ray source limitations
still prohibit the direct transfer of control or detection schemes. One approach to
overcome such limitations are mechanical motions of resonant absorber, which induces
an additional phase at nuclear forward scattering. In this thesis the use of oscillating
resonant absorber is examined theoretically. The phase offset of the oscillation offers
an additional and controllable degree of freedom, which in
uences the time and energy
spectrum of a scattered wave packet. One problem occurring due to the high energy,
is the lack of methods to measure the energy spectrum. To solve this problem, a new
approach is developed, using the phase offset to measure the energy spectrum and
the complex phase in the energy domain.