ILC-BDS Collimators - Simulation and Experiment Adriana Bungau The University of Manchester Group Annual Meeting December, 2007, Manchester Adriana Bungau The University of Manchester Group Annual Meeting December, 2007, Manchester Content Achievements wakefield simulation - wakefield experiment at ESA - collimator design Summary Plans for 2008 Achievements wakefield simulation - wakefield experiment at ESA - collimator design Summary Plans for 2008 Wakefield Simulations The current implementation of the existing wakefield classes was changed to allow derrived classes for spoiler wakefields Higher order mode wakefields were implemented in the tracking code Wake potentials for simple geometry were used (taper + flat part +taper) Resistive wakes assumed that the collimator material is titanium The current implementation of the existing wakefield classes was changed to allow derrived classes for spoiler wakefields Higher order mode wakefields were implemented in the tracking code Wake potentials for simple geometry were used (taper + flat part +taper) Resistive wakes assumed that the collimator material is titanium Wakefield simulations Emittance growth due to wakefiels was studied and its effect on luminosity at the IP The changes made to the tracking code and the new classes are now integrated in the CVS repository at DESY Emittance growth due to wakefiels was studied and its effect on luminosity at the IP The changes made to the tracking code and the new classes are now integrated in the CVS repository at DESY SLAC -ESA Experiment collimator wakefields of various geometries, material and having either a rough surface or polished were measured at ESA Two runs: March and July Measured the kick as a function of the collimator position Data was analysed on the Manchester cluster (setup and then upgraded the data analysis packages) BPM callibration and conversion of data files from the crude format into root files (with Lancaster Univ) collimator wakefields of various geometries, material and having either a rough surface or polished were measured at ESA Two runs: March and July Measured the kick as a function of the collimator position Data was analysed on the Manchester cluster (setup and then upgraded the data analysis packages) BPM callibration and conversion of data files from the crude format into root files (with Lancaster Univ) Collimator design collimator design using Geant4 (A.Bungau) and Fluka (L. Fernandez) was established by the beginning of this year Experiment will now follow (DL+RAL+Birmingham Univ ) collimator design using Geant4 (A.Bungau) and Fluka (L. Fernandez) was established by the beginning of this year Experiment will now follow (DL+RAL+Birmingham Univ ) Publications 2007 - "Emittance Growth Due to Higher Order Angular Multipole Mode Wakefields in the ILC-BDS Collimators" - PAC 2007, New Mexico - "Wakefield Models for Particle Tracking Codes" - PAC 2007, New Mexico - "Measurements of the Transverse Wakefields Due to Varying Collimator Characteristics" - PAC 2007, New Mexico - "Collimator Wakefields: Formulae and Simulation" - PAC 2007, New Mexico - "Emittance Growth Due to Higher Order Mode Wakefields in the ILC-BDS Collimators for Small Offsets" - EuroTev Report - "Emittance Growth Due to Higher Order Angular Multipole Mode Wakefields in the ILC-BDS Collimators" - PAC 2007, New Mexico - "Wakefield Models for Particle Tracking Codes" - PAC 2007, New Mexico - "Measurements of the Transverse Wakefields Due to Varying Collimator Characteristics" - PAC 2007, New Mexico - "Collimator Wakefields: Formulae and Simulation" - PAC 2007, New Mexico - "Emittance Growth Due to Higher Order Mode Wakefields in the ILC-BDS Collimators for Small Offsets" - EuroTev Report Talks Implementation of Higher Order Wakefields in Merlin - European Linear Collider Workshop, Daresbury - Collimator Design and Short Range Wakefields, CERN, Colsim meeting - Some Wakefield studies, CERN, Colsim meeting (with Roger Barlow) - ILC_BDS Collimator study, CERN, Colsim meeting - Wakefields in the ILC_BDS Collimators, Cockcroft Institute - 3rd Wakefield Workshop, Daresbury- Implementation of Higher Order Wakefields in Merlin - European Linear Collider Workshop, Daresbury - Collimator Design and Short Range Wakefields, CERN, Colsim meeting - Some Wakefield studies, CERN, Colsim meeting (with Roger Barlow) - ILC_BDS Collimator study, CERN, Colsim meeting - Wakefields in the ILC_BDS Collimators, Cockcroft Institute - 3rd Wakefield Workshop, Daresbury Summary The collimator design is now done and benchmark between 3 codes is in good agreement (Geant4, Fluka, EGS) Testing the collimator prototype for the damage scenario will now follow at KEK Modelling of higher order mode wakefields was done for Ti Collimators with circular apertures Changes to the Merlin code are uploaded at DESY The collimator design is now done and benchmark between 3 codes is in good agreement (Geant4, Fluka, EGS) Testing the collimator prototype for the damage scenario will now follow at KEK Modelling of higher order mode wakefields was done for Ti Collimators with circular apertures Changes to the Merlin code are uploaded at DESY To Be Done Initially Proposed : - carry on the work on collimator wakefields (implement Gdfidl/Echo results into Merlin) - shifts at ESA in the 2008 runs - start the work on pozitron beamline: - optimization of the spoiler position in the positron collimation system +beam studies - design of a hardware piece inside the helical undulator and calculate the energy deposition on it BUT: WITH THE ILC UNDER THREAT FROM STFC, THE LONG AND SHORT TERM GOALS MIGHT LOOK DIFFERENT NEXT YEAR! Initially Proposed : - carry on the work on collimator wakefields (implement Gdfidl/Echo results into Merlin) - shifts at ESA in the 2008 runs - start the work on pozitron beamline: - optimization of the spoiler position in the positron collimation system +beam studies - design of a hardware piece inside the helical undulator and calculate the energy deposition on it BUT: WITH THE ILC UNDER THREAT FROM STFC, THE LONG AND SHORT TERM GOALS MIGHT LOOK DIFFERENT NEXT YEAR!