Kavli Affiliate: Xiang Zhang
| First 5 Authors: Ke Wang, Ke Wang, , ,
| Summary:
The construction of the first phase of the High energy FRagment Separator
(HFRS Phase-I) has already been completed and it is anticipated to start beam
commissioning in autumn 2025. This paper presents the first order and higher
order beam optics calculations for the HFRS Phase-I, using measured magnet
data, and evaluates its experimental performance in preparation for beam
commissioning. The first order optics of HFRS is calculated based on the sliced
magnetic fields and the higher order aberrations are corrected using a
self-compiled program. Monte Carlo particle tracking is employed to analyze the
beam phase spaces on the focal planes. The experimental performance of the
machine is evaluated through Monte Carlo simulations. The beam phase spaces on
the focal planes are thoroughly examined, demonstrating that the higher order
aberrations have been well corrected. Moreover, the experimental performance of
HFRS is evaluated based on the corrected higher order optics, yielding
satisfactory results: the secondary beams of interest can be well separated and
exhibit high transmission efficiency. This work provides valuable insights for
the upcoming beam commissioning of HFRS Phase-I. The effective correction of
higher order aberrations and optimized magnet settings lay a solid foundation
for future experiments.
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