Speakers
Description
In ultralow-emittance storage rings, electron losses are primarily driven by Touschek scattering. Accurate measurement of the vacuum lifetime remains important as it provides early warning of potential vacuum degradation. The vacuum lifetime is defined by gas scattering processes, i.e., bremsstrahlung or elastic and inelastic scattering. Separating these contributions is essential for evaluating machine performance, as vacuum lifetime reflects the effective pressure seen by the beam, while Touschek lifetime depends strongly on particle density, linear and nonlinear optics as well as RF parameters.
In this contribution, we present studies at SLS 2.0 aimed at experimentally disentangling vacuum and Touschek loss mechanisms. Controlled transverse excitation of the stored beam is applied using the in-house developed multibunch feedback (MBFB) system to modify the particle density without changing other machine parameters. The resulting lifetimes are measured as a function of the measured beam size using dedicated beam-size monitors. These measurements are compared with predictions from the SLS 2.0 accelerator model, enabling identification of the dominant loss mechanisms and quantification of their relative contributions. The results provide valuable input for further optimization of beam stability and operational lifetime.
| In which format do you inted to submit your paper? | LaTeX |
|---|