CERN SPS

• Simulation work focuses on loss reduction and spill quality
• Need to track with crystal and through matter (PyCollimate being used and work ongoing to clean it and make it GPU-ready)
• Interest in accurate phase-space description for TL tracking
• Looking at Physics Informed Neural Networks for simple tracking
• Not so easy to get beam time
• Using MapTrack (SPS) → moving to Xsuite

CERN PS

• Need to do tracking in all six dimensions, can’t approximate
• Easier to get beam time
• Beam dump allows operation in parallel to physics
• PS can be used to benchmark simulation methods

CNAO

• Aim to characterise beam phase-space at extraction, to design gantries
• Mostly using MADX, looking to use PTC (already used for gantry designs, not synchrotron)
• Will also be using Xsuite
• New student to join soon and to start on RFKO simulations and port to Xsuite

GSI

• Accelerators: GSI-SIS18, SIS100, HIT
• Interested in Nano(10-100ns), Micro (10 us), and Macro (100ms) spill structure
• Interested in simulating beam loss on septum wires, magnetic field errors, transit time, and tune distributions
• Using Xsuite to simulate, also MADX and Elegant (developed at APS)
• Interest in RFKO
• Already seeing improvements using Xsuite over MADX, at spill lengths of 1.5 seconds

CERN SEEIIST + NIMMS (Medical)

• Focussed on PS, beam loss reduction on the septum
• Using MapTrack (Rebecca Taylor)
• Looking at RFKO
• Different methods of extraction, flexibility for high intensity, short spills (FLASH)
• Interested in higher order effects
• Can Xsuite work with fixed-field accelerators? Dynamic tune measurements?
• Requirements: ~1 million turns in ~8 hours

MedAustron

• Proton/Carbon Medical synchrotron
• Interested in RFKO and COSE
  • Optimise SX methods and parameters for spill structure (10s spill) and intensity ripple reduction
  • Multi Energy Extraction with COSE/RFKO (RF cavities)
  • Extracted beam ripples (magnets/cavities ripple effects)
  • Beam losses
• Mainly using MADX/cpyMad for RFKO, Xsuite for dynamic effects, BLonD
• Looking at ripples in RFKO
• Need 10^6 turns, 10^4 particles
• Requirements:
  • Handling 10^4 particles for 10^6 turns
  • Noise/ripple, TbT magnet trimming, deferred expressions, and longitudinal effects from cavities
  • Recording tune change during extraction
  • Time dependency

Needs for XSuite

• Topics touched which are already usable in Xsuite:
  • Virtual sextupole strength
  • Septum with aperture at both sides (black absorber)
  • Noise and custom RF (Pablo and GSI to make simple example to add to Xsuite doc)
• Open points:
  • Porting PyCollimate (action for CERN-ABT)
  • Field Tracking Maps => already have 2D time dependent map, implemented in a symplectic way
    • discussion started for 3D maps (check with Gianni)
    • Make simple example and upload on Xsuite doc page
  • SX optimisation: best practice and what different labs do