1 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Current Summary Work done by Oxford/RAL Group Contributors Holger Witte Jim Rochford.

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Presentation transcript:

1 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Current Summary Work done by Oxford/RAL Group Contributors Holger Witte Jim Rochford

2 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL 2D axis symmetric eddy current model of absorber cryostat

3 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Currents l Computation of eddy currents in focus absorber system under coil quench conditions »Max di/dt related to a run down in approx 3 secs –either linear run down or quench di/dt profile »Studied –Power dissipation in coil and absorber components –Forces in components – in particular windows »Cases –Flip –Solenoid – simple reversal –Flip with offset absorber

4 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Currents

5 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Currents

6 AFSWG Mtg 1 Aug 2003 Elwyn Baynham RAL Eddy Currents l Conclusions »No significant eddy current problems for design – power or forces l Further work »Solenoid mode repeat modelling –Some discrepancies in 2d modelling »Issue report