TY  - CONF
AU  - Wolff, Jonas
AU  - Eschke, Juergen
AU  - Goessel, Andre
AU  - Kasprzak, Karol
AU  - Reschke, Detlef
AU  - Steder, Lea
AU  - Trelle, Lennart
AU  - Wiencek, Mateusz
AU  - Hillert, Wolfgang
TI  - Impact of Medium Temperature Heat Treatments on the Magnetic Flux Expulsion Behavior of SRF Cavities
CY  - Geneva, Switzerland
PB  - JACoW Publishing
M1  - PUBDB-2023-04897
SN  - 978-3-95450-234-9
SP  - 726 - 730
PY  - 2023
N1  - Literaturangaben;
AB  - Medium temperature (mid-T) heat treatments at about 300 °C are used to enhance the intrinsic quality factor of superconducting radio frequency (SRF) cavities. Unfortunately, such treatments potentially increase the sensitivity to trapped magnetic flux and consequently the surface resistance of the cavity. For this reason, it is crucial to maximizethe expulsion of magnetic flux during the cool down. The flux expulsion behavior is next to the heat treatment mainly determined by the geometry, the niobium grain size and thegrain orientation. However, it is also affected by parameters of the cavity performance tests like the cool down velocity, the spatial temperature gradient along the cavity surface andthe magnetic flux density during the transition of the critical temperature. To improve the flux expulsion behavior and hence the efficiency of future accelerator facilities, the impact of these adjustable parameters as well as the mid-T heat treatment on 1.3 GHz TESLA-Type single-cell cavities is investigated by a new approach of a magnetometric mapping system. In this contribution first performance test results of cavities before and after mid-T heat treatment are presented
T2  - 21st International Conference on Radio-Frequency Superconductivity
CY  - 26 Jun 2023 - 30 Jun 2023, Grand Rapids, Michigan (USA)
Y2  - 26 Jun 2023 - 30 Jun 2023
M2  - Grand Rapids, Michigan, USA
KW  - Accelerator Physics (Other)
KW  - SRF Technology (Other)
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.18429/JACoW-SRF2023-WEPWB065
UR  - https://bib-pubdb1.desy.de/record/588723
ER  -