Evaluation of the MAX-Wiggler

A novel insertion device for electron storage rings, called the MAX-Wiggler [Nucl. Instr. and Meth. A 467–468 (2001) 118], has been constructed at MAX-lab. The MAX-Wiggler is a cold bore superconducting wiggler magnet with 47,3.5 T poles and a period length of 61 mm. It is designed for the production of X-rays at the 1.5 GeV electron storage ring MAX-II [Nucl. Instr. and Meth. A 343 (1994) 644] at MAX-lab. The MAX-Wiggler has been installed in the storage ring and this note describes the influence of the new insertion device on the storage ring performance. The main influence of the new insertion device is a vertical focusing effect which alters the beta functions. The vertical focusing of the insertion device has been compensated for by adjusting the magnetic optics of the storage ring. The measurements of the beam optics have been made using the response matrix method [Nucl. Instr. and Meth. A 388 (1997) 27].