2022-02-23 12:38 |
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2022-02-01 12:24 |
[PUBDB-2022-00928]
Bachelor Thesis
Messerschmidt, J. P. ; Tajalli Seifi, A. ; Kärtner, F.
Construction of a Tunable Laser for use in Grating Compressor Alignment
50 pp. (2021)2021 = Bachelorarbeit, University of Hamburg, 2021
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 |
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2021-12-23 10:52 |
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2021-09-23 12:14 |
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2021-09-06 10:40 |
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2021-09-06 10:35 |
[PUBDB-2021-03644]
Bachelor Thesis
Falkenberg, G. ; Schroer, C. ; Stückelberger, M.
Comparison of laser and X-ray beam induced current measurements of a crystalline Si solar cell
48 pp. (2021)2021 = Bachelorarbeit, Universität Hamburg, 2021
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 |
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2021-06-20 20:31 |
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2021-03-12 11:37 |
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