<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><div class=""></div><div class=""><br class=""></div><div class="">Obviously, if we wanted to be even more conservative, we could just have two foils, 30 cm apart at opposite ends of the target. Or a carbon multifoil and a copper multifoil, and sacrifice the running time to switch targets. </div><div class=""><br class=""></div><div class="">Thanks for the feedback!</div><div class="">-Axel</div><div class=""><br class=""></div><div class=""></div></body></html>