Advancements in Beam Dynamics and Simulation at John Adams Institute

Explore the latest research highlights in beam dynamics and simulation conducted by Stewart T. Boogert at the John Adams Institute in collaboration with Royal Holloway. Learn about the groundbreaking work in wakefield measurement, achieving a beam size of 65 nm, development of beam delivery simulation (BDSIM), and much more. Discover the contributions to CLIC2 and the essential role of beam instrumentation at ATF2, including tuning algorithms and diagnostics integration. Dive into the detailed studies on optics, tuning, orbit kick response, dispersion measurement, and wakefield measurement using movable setups. Witness the impactful advancements driving innovation in particle accelerator technology.

• Beam Dynamics
• Simulation
• Stewart T. Boogert
• John Adams Institute
• CLIC2

cjohn Follow

Uploaded on Sep 17, 2024 | 0 Views

Download Presentation

Please find below an Image/Link to download the presentation.

The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.

Presentation Transcript

1. Beam dynamics and simulation Stewart T Boogert John Adams Institute at Royal Holloway

2. Talk introduction Research highlights Wakefield measurement at ATF2 Helped achieve 65 nm beam size Beam delivery simulation (BDSIM) BDSIM geant 4 based simulation BDSIM CLIC post collision line CERN fellow L. Deacon Proposed work for CLIC2 Develop model BDSIM model for CLIC Collimator (and other structure wake-fields) 2 beam tuning IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 2

3. CLIC1 funding RHUL CERN Academic (Grahame Blair) 3.6 / 1.8 0 / 0 Academic (Stewart Boogert) 0 / 3 0 / 0 Academic (Andrei Seryi) 7.2 / 7.2 0 / 0 PDRA (Jochem Snuverink) 0 / 0 18 / 21 EUCARD - ASTeC 4.8 / 4.8? 15.6 / 16.8 18 / 21 0 / 0 TOTAL Travel 6 / 5 k Material 0 / 0 k IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 3

4. ATF2 optics Energy scaled Raimondi-Seryi FFS optics Focus vertical size 37nm at interaction point Local chromaticity correction Relies on design dispersion in FF Preserve low emittance from ATF ring (12 pm.rad) Compact ~ 38 m IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 4

5. ATF2 Tuning of ATF2 Help develop tuning algorithms at ATF2 Strong integration of diagnostics (see wakefield measurements) Pushed ATF2 optics Compton diagnostics essential (Shintake monitor) IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 5

6. CBPM : Orbit kick response IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 6

7. CBPM : Dispersion measurement Vary beam energy in ATF damping ring by a small shift in the RF frequency Record response in stripline and CBPM systems Online comparison with optics model (FFS based on dispersion) IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 7

8. CBPM : Wakefield measurement Goal: measure wakefield from cavity BPM Using movable setup with 1 or 2 reference cavities Looking at downstream orbit change Setup was used to compensate wakes from other locations Crucial for reaching small beam size IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 8

9. CBPM : Wakefield simulation Geometrical wake fields computed numerically with GdfidL ( http://www.gdfidl.de) and ACE3P Electromagnetic fields calculator in any 3D- structure Finite element method All higher modes included (up to cut-off frequency) The beam is represented as a line charge traveling along the z-axis with optional offsets in x and y, Gaussian distribution in z Good agreement with different methods Non-linear for large offsets IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 9

10. CBPM : Wakefield measurement example Wakefield kick will change the beam orbit slightly Experiment is ideally placed as many high resolution cavity BPMs both upstream and downstream of the setup Procedure: Take all upstream cavity BPM readings All BPM readings averaged subtracted Find contribution between those BPM readings and downstream cavity BPM readings Subtract orbit per pulse (by SVD matrix inversion) Remaining correlation with setup movement will give wakefield kick Orbit and shape follows simulation well Some discrepancy in absolute size compared to simulation (calculation + tracking). IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 10

11. BDSIM (Geant 4 + particle tracking) Project of G. Blair Taken over by S. Boogert, J. Snuverink and L. Nevay Improved Base code Conversion from MAD8, MADX Interfaces to PLACET Geometry description Work recently to implement LHC CLIC/ILC significantly easier IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 11

12. CLIC dump line (L. Deacon) Simulation Simulation Simulation Magnet 1a and 1b Main dump (water shown) with e-m shower Screenshot showing the entire post- collision line with an electron track in red Tunnel included but not shown IP Main dump (water) Magnet Beam pipe Concrete around main dump Beam losses with new layout Intermediate dump Post dump - concrete Simulation L. Deacon, L. Gatignon, ECFA Linear C ollider Workshop 2013 Beam losses in new layout (top) are small, less than ~100 W/m CDR baseline design (bottom): ~kW/m Intermediate dump (aperture shown) Thursday 30th May 2013 16 Thursday 30th May 2013 L. Deacon, L. Gatignon, ECFA Linear C ollider Workshop 2013 18 Main dump Thursday 30th May 2013 L. Deacon, L. Gatignon, ECFA Linear C ollider Workshop 2013 15 IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 Thursday 30th May 2013 losses 12 L. Deacon, L. Gatignon, ECFA Linear C ollider Workshop 2013 17 Thursday 30th May 2013 L. Deacon, L. Gatignon, ECFA Linear C ollider Workshop 2013 19

13. Future program Background studies for CLIC using PLACET/BDSIM Collimator background generation Compton signal backgrounds, emittance measurement system, energy spectrometers, in RTML, linacs and BDS Wakefield simulation Collimator wakefields Effect of wakes on low emittance transport Two beam tuning IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 13

14. Deliverables 2013 (December): Complete BDSIM simulation of CLIC collimation 2014 (April): Integrate wakefield simulations for CLIC BPMs and other structures in PLACET 2015 (April): Complete BDSIM simulation of CLIC beam delivery and two beam system 2016 (April): Integrate collimator wakefield and other possible wakes, other diagnostic structures 2016 (April): Paper on backgrounds in CLIC 2016 (April): Paper on CLIC tuning, including effects of wakefields. IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 14

15. New funding request RHUL CERN Total Academic (Stewart Boogert) 6 pm 0 6 pm PDRA (Jochem Snuverink) 18 pm 18 pm 36 pm Travel 3 k 15 k 18 k Material 0 k 0 k 0 k IBIC : Beam Instrumentation at ATF2 (S. T. Boogert for ATF collab.) 17/09/2024 15