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Wakefields of Undulator Taper with a 0.5mm bunch is calculated with 6000 cores and 12 hours. It used 0.25 mm mesh element size with 19 million quadratic tetrahedral elements for the whole geometry. The left hand side is the wakefield due to a 0.5 mm bunch while the right hand side is the comparison between the reconstructed wakefields of a 3 mm bunch from the wakefields of 0.5 mm bunch and the calculated wakefields for a 3 mm bunch. The comparison shows that they are in a remarkable agreement.
PEP-X Wiggler Taper
ERL Vacuum Chamber
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