Project: LCLS Device Type: Undulator Data Type: Serial Number: L143-112000-03 X and Y field measurements should be corrected by Hall probe offset for folders #49 and higher to agree with the long coil measurements. Xoffset = -0.05G Yoffset = -0.1G Bx = Bx_measured + Xoffset By = By_measured + Yoffset Yurii Levashov 03/07/07