Impact of medium temperature heat treatment on flux trapping sensitivity in SRF cavities
The effect of mid-T heat treatment on flux trapping sensitivity was measured on several 1.3 GHz single cell cavities subjected to vacuum annealing at temperature of 150 - 400 \(^\circ\)C for a duration of 3 hours. The cavity was cooldown with residual magnetic field \(\sim\)0 and \(\sim\)20 mG in th...
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| description | The effect of mid-T heat treatment on flux trapping sensitivity was measured on several 1.3 GHz single cell cavities subjected to vacuum annealing at temperature of 150 - 400 \(^\circ\)C for a duration of 3 hours. The cavity was cooldown with residual magnetic field \(\sim\)0 and \(\sim\)20 mG in the Dewar with cooldown condition of full flux trapping. The quality factor as a function of accelerating gradient was measured. The results show the correlation between the treatment temperature, quality factor, and sensitivity to flux trapping. Sensitivity increases with increasing heat treatment temperatures within the range of (200 - 325 \(^\circ\)C/3h). Moreover, variations in the effective penetration depth of the magnetic field and the density of quasi-particles can occur, influencing alterations in the cavity's electromagnetic response and resonance frequency. |
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| subjects | Elementary excitations Heat treatment Holes Magnetic fields Penetration depth Q factors Sensitivity Trapping Vacuum annealing |
| title | Impact of medium temperature heat treatment on flux trapping sensitivity in SRF cavities |
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