SLAC Magnetic Measurements Date: 01-24-2025 Time: 08:42:43 Project: LCLS-II-HE Device Type: Undulator Data Type: Serial Number: HE_SXU_029 DATASET Number: 1 Tuning Stage: Tuning Run Number: 18 Measurement Type: Long Coil Scans Operator: YL Comment: 1By vs Gap; Round 4