1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Minimizing dispersion through resonant extraction for BNL's NSRL

TUPB016
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Bear (TWTC)

Exhibiton Hall A _Bear

TWTC

Poster Presentation MC4.T12 Beam Injection/Extraction and Transport Tuesday Poster Session

Speaker

Eiad Hamwi (Cornell University (CLASSE))

Description

Simulations, analysis, and measurements are performed on the BNL Booster’s third integer resonance extraction to the NSRL line, which uses a constant optics slow extraction method. In this method, ring dipoles and quadrupoles are changed synchronously for a coasting beam, which aids in maintaining a fixed separatrix orientation through the spill. Simulations show that the outgoing beam has a very small dispersion, independent of the periodic dispersion value at the septum. We show using a first-order normal form approximation that transforms to the Kobayashi Hamiltonian, how the dynamics of such a spill lead to a dispersion-free outgoing beam, which is critical to the uniformity requirements of the NSRL. Finally, we measure the dispersion of the beam by varying the flattop energy of the coasting beam in the booster before engaging the spill and show that the magnitude of dispersion is reduced by over a factor of 5 from the periodic value.

Funding Agency

This work has been supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy, and No. DE-SC0018008.

Region represented America
Paper preparation format LaTeX

Author

Eiad Hamwi (Cornell University (CLASSE))

Co-authors

Bhawin Dhital (Brookhaven National Laboratory) David Sagan (Cornell University (CLASSE)) Georg Hoffstaetter (Cornell University (CLASSE)) Kevin Brown (Brookhaven National Laboratory) Petra Adams (Brookhaven National Laboratory) Trevor Olsen (Brookhaven National Laboratory)

Presentation materials

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