10–15 Aug 2025
SAFE Credit Union Convention Center
America/Los_Angeles timezone

Interactions between the circulating beam and the injection foil at the Proton Storage Ring of LANSCE

TUP054
12 Aug 2025, 16:00
2h
SAFE Credit Union Convention Center

SAFE Credit Union Convention Center

1401 K St, Sacramento, CA 95814
Poster Presentation MC5 – Beam Dynamics and EM Fields TUP: Tuesday Poster Session

Speakers

En-Chuan Huang (Los Alamos National Laboratory) Joshua Yoskowitz (Los Alamos National Laboratory)

Description

At the Los Alamos Neutron Science Center (LANSCE), the injection system of the Proton Storage Ring (PSR) utilizes charge exchange via a stripping foil to convert H⁻ ions into H⁺. While beam losses caused by partially stripped neutral hydrogen atoms are a primary concern, interactions between the circulating beam and the injection foil also play a significant role in overall beam loss. Each stored proton interacts with the foil 30 times on average. As a result, large-angle scattering is a dominant cause of beam losses in beam dynamics simulations.
To mitigate these effects, a set of bump magnets is employed to gradually move the closed orbit away from the foil during the accumulation process. In this work, we first compare various foil scattering algorithms used in ring simulations against results from Monte Carlo (MC) codes. We then quantify the impacts of different bumping schemes, assess uncertainties related to injection offsets, generate interaction 2d-distribution on the foil for heat load simulations, and evaluate the effects of different injected beam distributions.

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Authors

Anna Alexander (Los Alamos National Laboratory) Charles Taylor (Los Alamos National Laboratory) En-Chuan Huang (Los Alamos National Laboratory) Dr John Lewellen (Los Alamos National Laboratory) Joshua Yoskowitz (Los Alamos National Laboratory) Martin Kay (Los Alamos National Laboratory) Remington Thornton (Los Alamos National Laboratory)

Presentation materials

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