Kristoffer K. Andersen

Channeling and Radiation of Electrons in Silicon Single Crystals and Si1−xGex Crystalline Undulators

The phenomenon of channeling and the basic features of channeling radiation emission are introduced in a pedestrian way. Both, radiation spectra as well as dechanneling length measurements at electron beam energies between 195 and 855 MeV feature quantum state phenomena for the (110) planar potential of the silicon single crystals. Radiation from a crystalline undulator, produced at the Aarhus University (UAAR), has been investigated at the Mainz Microtron electron accelerator facility MAMI. The 4-period epitaxially grown strained layer Si1−xGex undulator had a period length λu = 9.9 μm. At a beam energy of 375 MeV a broad excess yield around the theoretically expected photon energy of 0.132 MeV has been observed. Model calculations on the basis of synchrotron-like radiation emission suggest that evidence for a weak undulator effect has been observed.

Experimental investigations of synchrotron radiation at the onset of the quantum regime

The classical description of synchrotron radiation fails at large Lorentz factors,

Artificial neural networks for removal of couplings in airborne transient electromagnetic data

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Utilizing massively parallel co-processors in the AarhusInv 1D forward and inverse AEM modelling code

, for relativistic electrons crossing strong transverse magnetic fields

Experimental investigation of the Landau-Pomeranchuk-Migdal effect in low- Z targets

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A System Response Convolution Routine for Improved Near Surface Sensitivity in SkyTEM Data

. In the rest frame of the electron this field is comparable to the so-called critical field

Neural Networks for Efficient and Automatic Removal of Coupled TEM Data

B_0 = 4.414\cdot10^9

Artificial neural networks for efficient removal of coupled airborne transient electromagnetic data

T. For

An overview of the newest SkyTEM and inversion technologies with focus on resolution of shallow geological layers

\chi = \gamma B/B_0 \simeq 1

Experimental realization of a new type of crystalline undulator.

quantum corrections are essential for the description of synchrotron radiation to conserve energy. With electrons of energies 10-150 GeV penetrating a germanium single crystal along the