Laser re-melting pit technique for single- cell SRF cavity gradient pushing Mingqi Ge, Genfa Wu, Jinhao Ruan, Thomas nicol, Lance Cooley.

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Presentation transcript:

Laser re-melting pit technique for single- cell SRF cavity gradient pushing Mingqi Ge, Genfa Wu, Jinhao Ruan, Thomas nicol, Lance Cooley

2 Laser source Ar gas cylinder CCD camera Laser beam deliver line Laser focus platform X-Y stage V-block with rollers Monitor Gas nozzle holder Rotation stage Mirror LED light Nozzle Cavity

3 After re-melting the pit depth changed for 120um to 30 um Manmade pit Profile Comparison before and after laser re-melting

4 Laser processing of 1.3GHz single-cell cavity TE1ACC003 The Pit before re-meltingAfter re-melting 400 micron in Diameter 60 Micron in depth

5 The Pit before re-melting After re-melting Images was taken from Kyoto Optical Inspection machine

Cavity TE1ACC003 vertical test result after laser processing (E acc =39.5MV/m)