Novel adiabatic bifilar helical wiggler entrance for free-electron laser applications

Hartemann, F.; Buzzi, J. M.; Lamain, H.
August 1988
Applied Physics Letters;8/22/1988, Vol. 53 Issue 8, p631
Academic Journal
A new adabatic bifilar helical wiggler entrance is presented. This introduction region is obtained by using a liquid shunt resistance to progressively shunt the current circulating in the wiggler helical windings. We have built a prototype wiggler and measured the field profiles obtained with this new scheme. The results agree very well with computer calculations and show that, indeed, one obtains a high quality adiabatic wiggler with this method.


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