Bent Crystal Results to Date Feb 22, 2007 D. Still

Summary of the Crystal Studies: Find where the new strip type crystal can channel in preparations for visitors this next week. Find where the new strip type crystal can channel in preparations for visitors this next week. To date used 8 EOS for 15 hours of studies in attempt to find the channel. To date used 8 EOS for 15 hours of studies in attempt to find the channel. Changed the procedure in order to reduce noise and have some confidence that we could find the channel. Changed the procedure in order to reduce noise and have some confidence that we could find the channel.

The Plan this Week: Finish scanning the 8 mrad angular range of inchworm. Investigate anything that looked like channeling. 8 mrad Angular Inchworm range This is the signature we are looking for Scanned last week Scanned this week

Looking for the channel

Channel Signature

Could not Confirm Channeling Should have seen channeling but only saw large losses. Maybe due to beam motion, angle does Not repeat? Beam on Feb 20 different than Previous store. Crystal and E03H Did not go in as far. Previous EOS FEB 20 EOS

The Plan for this next week: Y. Chesnokov arrived Tue and has sat in for some EOS. Y. Chesnokov arrived Tue and has sat in for some EOS. W. Scandale, M. Foririn, V. Guidi, S. Sawada arrived yesterday. W. Scandale, M. Foririn, V. Guidi, S. Sawada arrived yesterday. We hope to get at least 2 more EOS studies to finish the entire scan of angular range at 2urad step. We hope to get at least 2 more EOS studies to finish the entire scan of angular range at 2urad step. We hope to rescan the area that we thought we found channeling to see if we can confirm channeling. We hope to rescan the area that we thought we found channeling to see if we can confirm channeling. If no channeling can be found after 2 EOS studies, access to verify crystal bend angle. T. Johnson is building a laser jig. Figure out the problem. If no channeling can be found after 2 EOS studies, access to verify crystal bend angle. T. Johnson is building a laser jig. Figure out the problem. If can confirm channeling, request every EOS for next week to finish the study which is demonstrate halo loss reduction with bent crystal compared to tungsten target. If can confirm channeling, request every EOS for next week to finish the study which is demonstrate halo loss reduction with bent crystal compared to tungsten target.