Speaker
Description
Injection losses are a key challenge for SOLEIL II commis-
sioning because the reduced storage-ring acceptance makes
off-axis injection highly sensitive to transport and optics
errors. We use multiparticle tracking with a corrected lat-
tice model including realistic static and jitter errors in the
booster and Transfer Line 2 (TL2). The results show that
losses are primarily governed by the injected phase-space
distribution at the MIK. Most particles are intercepted at the
septum and at Straight Section 7 (SDM07), while the injec-
tion acceptance window sets the efficiency for all studied
error scenarios. Emittance exchange improves the horizon-
tal footprint only if the final TL2 focusing errors remain at
the percent level; otherwise, the enlarged vertical beam size
samples the non-linear MIK field and generates large hori-
zontal over-kicks. These results provide practical tolerances
and tuning priorities for top-up commissioning.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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