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

Modelling resonant depolarisation

MOPM013
2 Jun 2025, 16:00
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC1.A02 Lepton Circular Colliders Monday Poster Session

Speaker

Frank Zimmermann (European Organization for Nuclear Research)

Description

For the FCC-ee collider it is planned to, in regular intervals (minutes), measure the average beam energy of the circulating electron and positron beams with a relative precision of $10^{-6}$ or better, using the method of resonant depolarisation with pre-polarized pilot bunches. In this article, we study basic systematic effects and ultimate uncertainties that may arise in this kind of measurement. To do so, we carry out simulations for a simple model representing an ideal situation, where an ensemble of particles with energy spread is subjected to synchrotron oscillations and to perfect spin motion. We assume an initial spin orientation in the vertical direction for all particles. The behavior of the spin is explored as an exciter frequency is swept slowly or rapidly, and in either direction,through the spin resonance.

Funding Agency

Work supported by the Swiss CHART programme

Region represented Europe
Paper preparation format LaTeX

Author

Frank Zimmermann (European Organization for Nuclear Research)

Co-authors

Clara Kiel (École Polytechnique Fédérale de Lausanne) Jacqueline Keintzel (European Organization for Nuclear Research)

Presentation materials

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