Accelerator physics at TU Darmstadt/TEMF

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1 Accelerator physics at TU Darmstadt/TEMF Institut Theorie Elektromagnetischer Felder (TEMF) Computational Electromagnetics Laboratory 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 1

2 TEMF Staff Professors: Oliver Boine-Frankenheim Harald Klingbeil Irina Munteanu Accelerator physics Accelerator technology Finite Methods and and and GSI Beam physics department GSI Ring RF department CST AG Sebastian Schöps Comput. Electromagnetics Research group leaders: Thomas Weiland Head of the institute + 36 Phd students and dpostdocs (17 with accelerator related topics) Wolfgang Ackermann High frequencies Erion Gjonaj Coupled problems Wolfgang Müller Beam dynamics 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 2

3 Projects with Accelerator Labs With IKP/S-DALINAC - see next presentation With GSI/FAIR - Beam dynamics and impedance simulations/measurements - Collimation and machine protection - RF control, feedback and beam diagnostics - Laser ion acceleration: LIGHT@GSI With DESY - Photo Injector Test Facility, Zeuthen (PITZ) - TESLA: EM field simulations With CERN - Electron cloud studies for SPS/LHC - Impedances simulations for HI-LUMI External funding sources: -BMBF - DESY -DFG - GSI-TUDa cooperation - HIC for FAIR With Brookhaven Nat. Lab. - Beam simulations for RHIC 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 3

4 Selected example projects 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 4

5 TESLA 9-cell cavity: Eigenmodes W. Ackermann et al. PEC boundary condition Port boundary conditions Port boundary conditions Search for: Cong Liu Vladimir Kudrin - field distribution, - resonance frequency - quality factor Dipole mode 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 5

6 Beam dynamics and wakefield computations for the PITZ-injection E. Gjonaj, W. Müller et al. 0.5 m 1 m 3.1 m 4.8 m 5.74 m PITZ diagnosis section and laser mirror Q = 1nC X rms = 0.4mm Ye Chen 0 E / (MV / m) Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 6

7 Electron clouds in the CERN LHC Fedor Petrov PIC simulation of the electron density in a LHC dipole magnet -> wake fields, incoherent tune shift Picture from: O. Boine-F., F. Petrov, Th. Weiland et al., Phys. Rev. ST-AB (2012) 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 7

8 Digital RF control and feedback for FAIR H. Klingbeil et al. Models, control system theory and technical implementation of longitudinal beam stabilization systems. FAIR digital Low-Level RF system: Customized boards to control amplitude/phase. Uta Hartel H. Klingbeil et al., Phys. Rev. ST Accel. Beams (2011) Kerstin Groß Microcontroller LLBBC-BoardBoard RF-Board FPGA (4->2->1) Bunch Merging Experiment in the GSI SIS Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 8

9 Beam diagnostics for FAIR Tune spectrum measured in SIS-18 Intensity Difference signal U : beam offset fluctuations x spectrum analyzer U in Pick-up Dipole moment: d(t) I (t)x(t) s Bunch Intensity parameter: q sc Q sc Quadrupolar Q s Rahul Singh pickup Q sc : space charge tune shift Q s : synchrotron tune R. Singh, O. Boine-F., Th. Weiland et al., Phys. Rev. ST-AB (2013) Position of the satellites: Q k Q sc 2 Q 2 /4 (kq sc s ) 2 Joel Tsemo Kamga 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 9

10 Impedance simulation and bench measurements of FAIR ring components Goal: Compare measurements to simulation models. SIS-18 Kicker Magnet Uwe Niedermayer + Lewin Eidam Low frequency set-up Pipe impedance: Analytic vs. measurement Thin (0.3 mm) SIS-100 beam pipe Longitudinal E-field Supply network Coil Wall current Simulation for complex shape U. Niedermayer, O. Boine-F., NIM A (2012) Long bunches Low frequencies Simulation in frequency domain! 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 10

11 Infrastructure: TEMF Computing Cluster 172 nodes, cores, TFlop/s Used for parallel computing with MPI. Examples are the simulations shown for PITZ and TESLA. Fast Quad Data Rate (QDR) Infiniband ib connections 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 11

12 Many thanks for your attention. Enjoy your stay in Darmstadt! 11. Dezember 2013 TU Darmstadt Fachbereich 18 Institut Theorie Elektromagnetischer Felder Prof. Dr. Oliver Boine-Frankenheim 12