Resonant Slow Extraction Simulation using Bmad

Technical Report · Fri Mar 28 04:00:00 EDT 2025

DOI:https://doi.org/10.2172/2549248· OSTI ID:2549248

Dhital, Bhawin ^[1]; Brown, K. A. ^[1]; Olsen, T. ^[1]; Lin, W. ^[1]; Hamwi, E. ^[2]; Sagan, D. ^[2]; Hoffstaeter, G. ^[2]

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1. Brookhaven National Laboratory (BNL), Upton, NY (United States)
2. Cornell Univ., Ithaca, NY (United States)

Simulations of slow extraction and transport of charged particle beams from synchrotrons requires careful modeling and experimentation. In this paper, we outline how the Bmad modeling software was adapted and developed to run third-integer resonant extraction simulations of beams at Brookhaven National Laboratory’s Booster synchrotron. Further, we show experimental comparisons of the slowly extracted beams transferred to the NASA Space Radiation Laboratory (NSRL) transport line. In this process, beam passes through a stripping foil element at the extraction point, which, along with stripping remaining electrons from the beam ions, acts as a scatterer to modify the phase space, moving to a more Gaussian-like distribution. This modification to the beam helps generate a uniform beam at the beam line’s target location; which is necessary for the variety of experiments performed at the facility. During this work, beam energy loss and multiple scattering by foil routines were built in conjunction with the Bmad code developers and are now integrated into the software.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP); National Aeronautics and Space Administration (NASA)
• DOE Contract Number: SC0012704
• OSTI ID: 2549248
• Report Number(s): BNL--227968-2025-TECH; CA/AP/724
• Country of Publication: United States
• Language: English

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