Several possible scenarios of Energy Recovery Linac (ERL) beam optics design are investigated to support the low emittance high current CW electron beam needed to drive a new ERL based X-ray Source. It is shown by numerical simulations that sufficiently high multipass beam break-up (BBU) threshold current can be achieved in a straightforward one-pass one-linac ERL scenario. A simple guideline for choosing optimal linac and recirculating transport line optics is suggested to realize best possible BBU thr eshold current.

This work supported by U.S. DOE under contract DE-AC05-84ER40150.

Authors: Ivan Bazarov (LNS/CHESS, Cornell University), Geoffrey Krafft and Lia Merminga (Jefferson Lab)

Abstract submitted to PAC 2001, Chicago, IL, June 18-24, 2001

Updated March 28, 2001

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