Oliver Noll | Searcharxiv

arXiv2022

Performance Tests of Feature Extraction Algorithms for Short Preamplifier Transients

In this work the extraction of pulse time and amplitude from short pulse transients is analysed as they are recorded by a transient recorder ASIC called ATR16. Algorithms of different complexity are tested with simulated preamplifier data processed with a VHDL model of the ATR16 ASIC. It is shown that a time precision below 1 ns and a signal amplitude precision below 1 MeV energy equivalent is feasible.

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arXiv2022

Investigation on intense axial magnetic field shielding with a large melt cast processed Bi-2212 tube

The feasibility of shielding axial magnetic fields up to 1.4~T, using a Bi-2212 hollow cylinder, is investigated at a temperature of 4.2~K. The residual magnetic flux density along the axis of the tube is measured at external fields of 1~T and 1.4~T. The shielding factor, defined as the ratio between the applied and the residual magnetic flux densities at the center of the tube, is measured to be $32\times 10^4$ at 1~T and $12\times 10^3$ at 1.4~T. The induced current density is evaluated from the measurements taking the thickness of the tube into account. The stability of the measurements over time is also addressed. Numerical simulations for the external and the residual magnetic flux densities are performed and compared to the experimental results. The study shows a high shielding performance of the Bi-2212 superconductor tube at 4.2~K up to 1.4~T.

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