Bachelor Theses

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2022-08-31
10:16
[PUBDB-2022-04628] Bachelor Thesis
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Konstruktion einer verkürzten Variante eines Undulators unter Berücksichtigung des Verformungsverhaltens
132 pp. () = Bachelorarbeit, Hochschule für Angewandte Wissenschaften Hamburg, 2022  GO
Diese Bachelorthesis umfasst die Änderungskonstruktion einer verkürzten Variante eines 5m-Undulators unter Berücksichtigung des Magnetträger-Verformungsverhaltens.Die Magnetträger sind symmetrisch, maximal zu kürzen. Alle weiteren Komponenten sollen möglichst unverändert bleiben. [...]
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2022-02-23
12:38
[PUBDB-2022-01312] Bachelor Thesis
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Development of an Nano Electrospray Source for Single Particle Imaging Application
83 pp. () = Bachelorarbeit, Technical University of Applied Sciences Lübeck, 2021  GO
In this thesis a nano-electrospray ionization source gets developed. Since nano-electrosprayionization has an increasing importance for single particle imaging we want to optimizethe developed nano-electrospray ionization source for single particle imaging applica-tion. [...]

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2022-02-01
12:24
[PUBDB-2022-00928] Bachelor Thesis
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Construction of a Tunable Laser for use in Grating Compressor Alignment
50 pp. () = Bachelorarbeit, University of Hamburg, 2021  GO
Aligning the gratings of an optical compressor for femtosecond pulses, as used inchirped pulse amplification, is a nontrivial task. In order to simplify this task a portabletunable continuous-wave laser, with automated wavelength tuning, was designed, constructedand automated. [...]
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2022-01-26
13:39
[PUBDB-2022-00753] Bachelor Thesis
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Charakterisierung von Laser-Bursts durch Spektrograph mit MHz-Ausleserate
58 pp. () = Bachelorarbeit, University of Hamburg, 2021  GO
The Free Electron Laser in Hamburg FLASH provides short X-Ray and ultraviolet pulses with high repetition rates in bursts. Optical laser systems create synchronized bursts in various wavelength ranges for pump-probe-experiments. [...]
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2021-12-23
10:52
[PUBDB-2021-05625] Bachelor Thesis

3D image analysis of the morphology andthe oxygen diffusion withinmicroparticle-enhanced fungal pellets usingsynchrotron radiation-based X-raymicrotomography
Technische Universität München, School of Life Sciences 130 pp. () = Bachelorarbeit, Technische Universität München, 2021  GO
Filamentous fungi are fo high biotechnological interest. Their fermentation products can beused for producig various goods. [...]

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2021-09-23
12:14
[PUBDB-2021-03808] Bachelor Thesis
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Suche nach pseudoskalaren Dunkle-Materie-Mediator-Teilchen in Signaturen mit zwei Bottom-Quarks, einem leptonisch zerfallenden 𝒁𝟎- Boson und fehlender Transversalenergie
72 pp. () = Bachelorarbeit, University of Hamburg, 2021  GO
Obwohl etwa 85% der gesamten Materie im Universum aus Dunkler Materie besteht (vgl.Eidemüller 2017: 5), ist ihre Natur bisher noch ungeklärt. Lediglich die Gravitationswirkung, die Dunkle Materie auf sichtbare Materie zu hab en scheint, ist erwiesen. [...]
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2021-09-06
10:40
[PUBDB-2021-03645] Bachelor Thesis
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Lock-in Amplification for Laser and X-ray Beam Induced Current Measurements of Solar Cells
68 pp. () = Bachelorarbeit, Universität Hamburg, 2021  GO
Laser beam induce current (LBIC) and X­ray beam induced current (XBIC) are effective tech­niques for mapping the spatial electrical performance of solar cells. Conducting precise currentmeasurements up to the femto­Ampere range is challenging and susceptible to noise [...]
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2021-09-06
10:35
[PUBDB-2021-03644] Bachelor Thesis
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Comparison of laser and X-ray beam induced current measurements of a crystalline Si solar cell
48 pp. () = Bachelorarbeit, Universität Hamburg, 2021  GO
X­ray beam induced current (XBIC) and laser beam induced current (LBIC) measurements en­able the point by point correlation of solar cell performance with complementary measurementmodalities in scanning microscopy.In this Bachelor’s thesis a complete mini­module with a mono­crystalline silicon solar cell in­cluding housing was measured using a 28keV X­ray beam and a 532nm laser beam as a probe.In particular, the influence of an Ag finger front contact on the multi­model signals induced bythe two measurement probes was compared.The hard X­ray photons were nano­focused and the energy was chosen that the beam can pene­trate the complete module and excite the AgK electrons in the Ag fingers. The strong absorptanceof the Ag fingers can be clearly seen in the X­ray transmittance measurements. [...]
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2021-08-19
14:23
OpenAccess [PUBDB-2021-03435] Bachelor Thesis
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Study of Interferences Between Resonant Heavy-Higgs-Boson Production and Top-Antitop-Quark Production in the nStandard Model
112 pp. () [10.3204/PUBDB-2021-03435] = Bachelorarbeit, University of Hamburg, 2021  GO
Recent discoveries in the area of cosmology, like the proposition of dark matter, haveindicated that there may be additional particles beyond the Standard Model which mayexplain the phenomena of Dark Matter in the Universe. Among many suggestions ofwhat Dark Matter actually is, there are models such as two-Higgs doublet Models thatpredict the existence of additional scalar (H) or pseudoscalar (A) Higgs bosons whichcould function as mediators between Standard Model and Dark Matter particles. [...]
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2021-06-20
20:31
[PUBDB-2021-02687] Bachelor Thesis
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Commissioning of a Calibration Device for Second Sound Based Quench Detection and Reconstruction Analysis
49 pp. () = Bachelorarbeit, University of Hamburg, 2021  GO
An important part of research and development (R&D) in the field of superconducting radiofrequency cavities is quench detection since these local breakdowns of superconductivity primarilylimit the cavity performance. Due to the detection of second sound waves propagating inliquid helium, the localization of quench spots on superconducting radio frequency cavities no longer requires the laborious attachment of many temperature sensors. [...]
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