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Design of mobile vacuum chamber for loading samples into high-frequency electron paramagnetic resonance spectrometer
Láznička, Tomáš ; Slageren, Joris van (oponent) ; Neugebauer, Petr (vedoucí práce)
In order to be able to characterize atmosphere sensitive samples in high-frequency electron paramagnetic resonance spectrometer (HF-EPR), a system of vacuum transportation is needed. The scope of this thesis is to design and develop a vacuum transport system which will allow this transportation. The vacuum system, which consists of a mobile vacuum suitcase, palette holder and airlock, was designed, assembled and tested. The pressure of 4.3 10^{-10} mbar was achieved, which will ensure inert condition for sample transportation. The transport of the sample from an ultra-high vacuum (UHV) cluster to the HF-EPR spectrometer was performed. The contamination of the test samples was characterized using x-ray photoelectron spectroscopy. It was found that there is no detectable contamination if the sample is in the vacuum system for less than 16 hours. The extension for transportation of the samples from a glove box and sample palette for graphene were proposed, but their production has not been performed yet. The developed vacuum system is fully functional and provides the alternative to commercially available products, thus it will be further used in the investigation of an atmosphere sensitive samples in CEITEC Nano laboratories.
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Design of mobile vacuum chamber for loading samples into high-frequency electron paramagnetic resonance spectrometer
Láznička, Tomáš ; Slageren, Joris van (oponent) ; Neugebauer, Petr (vedoucí práce)
In order to be able to characterize atmosphere sensitive samples in high-frequency electron paramagnetic resonance spectrometer (HF-EPR), a system of vacuum transportation is needed. The scope of this thesis is to design and develop a vacuum transport system which will allow this transportation. The vacuum system, which consists of a mobile vacuum suitcase, palette holder and airlock, was designed, assembled and tested. The pressure of 4.3 10^{-10} mbar was achieved, which will ensure inert condition for sample transportation. The transport of the sample from an ultra-high vacuum (UHV) cluster to the HF-EPR spectrometer was performed. The contamination of the test samples was characterized using x-ray photoelectron spectroscopy. It was found that there is no detectable contamination if the sample is in the vacuum system for less than 16 hours. The extension for transportation of the samples from a glove box and sample palette for graphene were proposed, but their production has not been performed yet. The developed vacuum system is fully functional and provides the alternative to commercially available products, thus it will be further used in the investigation of an atmosphere sensitive samples in CEITEC Nano laboratories.
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