TU3B4
ANL, Lemont, Illinois, USA
Multi-bend achromat-based light source designs are known to have rather strong focusing and rather small vacuum chambers, which pretty much guarantees difficult commissioning. To ensure the Advanced Photon Source Upgrade* commissioning is possible, the automated commissioning simulations were developed**. The simulations start from trajectory correction in the transport line, go through first-turn correction, trajectory and orbit correction, and complete with lattice and coupling correction. In addition to ensuring smooth commissioning, these simulations proved very useful in evaluating error tolerances under the most realistic conditions. In some cases, this approach allows for significant relaxation of the tolerances. We will describe APS-U automated commissioning simulations and give examples of error tolerance evaluations.
*M. Borland et al., "The Upgrade of the Advanced Photon Source", in Proc. IPAC’18, Vancouver, Canada, Apr.-May 2018, pp. 2872-2877
**V.Sajaev, "Commissioning simulations for the aps upgrade lattice," Phys. Rev. Accel. Beams, vol. 22, p. 040102, 2019
