1. FP7 SC WP 10 Task 5, Meeting #4, R.M. Jones, Cockcroft Inst., 10 h March 2011 1 WP 10.5 HOM Distribution Roger M. Jones Contribution from Cockcroft Institute and The University of Manchester

2. FP7 SC WP 10 Task 5, Meeting #4, R.M. Jones, Cockcroft Inst., 10 h March 2011 2 To Do ListTo Do List: 10.5 HOM Distribution 10.5 HOM Distribution Priority (2) Normal Status In Progress % Complete 0% Assigned To Roger Jones DescriptionRoger Jones 10.5.1 Development of HOM based beam position monitors (HOMBPM) (N. Baboi / DESY) 10.5.2 Development of HOM Cavity Diagnostics and ERLP (HOMCD) (R.M. Jones / CI) 10.5.3 Measurement of HOM Distributions and Geometrical Dependences (HOMDG) (U. van Rienen / UROS). Start Date 01/04/2009 Due Date 31/03/2013 Ref: official EuCARD Espace: https://espace.cern.ch/SRF.

3. FP7 SC WP 10 Task 5, Meeting #4, R.M. Jones, Cockcroft Inst., 10 h March 2011 3 WP 10.5 Milestones & Deliverables One Milestone on the horizon – 10.5.1 (Nicoleta) HOM Alignment Cavity Electronics Verification, 30 th March 2012. Two deliverables  10.5.1 (Nicoleta) HOM electronics and code to probe beam centering of 3.9 GHz cavities, 29 th March 2013  10.5.2 (Roger) Report on HOM experimental method and code, 29 th March 2013

4. 4 FP7 SC WP 10 Task 5, Meeting #4, R.M. Jones, Cockcroft Inst., 10 h March 2011 On track for milestones and deliverables Five conf. pubs (10.5.1 and 10.5.2) -SCRF, PAC + two Linac (complete!) and an ongoing EuCARD/DESY internal report (written largely by Ian and reviewed by Hans-Walter, in process!). PRST- AB Pub (spearheaded by Hans-Walter, in progress)? Measurements continuing at FLASH –more analysis + exps needed to understanding cavity coupling. Progress (Pei) on SVD vs DLR Trapped higher band modes verified experimentally –implementing electronics will be problematic Simulations ongoing –single, through to full 4-cavity module. Capitalizes on efficient use of globalised cascading (CST and recent HFSS results available). Hans-Walter, Thomas and Roger presented at Cornell HOM workshop (Oct 11 th - 13 th, 2010) Upcoming -Paris 4-5 May (SC WP10), 2 nd EuCARD review (10-13 th May) Proposal –”HOM loads and Diagnostics” Workshop (12-14 th Sept, 2011) WP 10.5 Summary