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Synchrotron/Neutron/Fusion » Insertion Devices (Undulators) » NSLS II Three-Pole Wiggler - TPW
NSLS II Three-Pole Wiggler - TPW



The NSLS-II storage ring is 792 m in length designed to deliver photons with high average spectral brightness in the 2 keV to 10 keV energy range exceeding 1021 ph/s/0.1%BW/mm2/mrad2. The ring will operate at 3 GeV, which is considered medium range, yet the brightness and flux are what will make NSLS-II unique.


Undulator Type


Photon energy range [keV]

Hard x-ray (<0.010 – 25)

Total device length mm


Number of periods


Minimum magnetic gap mm


Peak magnetic field strength in linear mode, B [T]


hν critical [keV]


Horizontal angular power density [kW/mrad]


On-axis power density [kW/mrad2]



The three-pole wigglers, are inserted just upstream of the downstream bend magnet in the super-period, will produce a very useful hard x-ray bend-magnet-like spectrum. With a critical energy of 6 keV, the three-pole wigglers will produce usable hard x-ray flux out to ~25 keV. The emitted horizontal angular fan from these devices is 2 mrad wide.


ADC USA (ISO 9001 certified), located near Cornell University in Ithaca, New York, is a leading developer and supplier of complex scientific components and instruments for large government laboratories and corporations around the world. Founded as a privately held company in 1995, ADC has grown into one of world’s leading technology companies and has enjoyed 18 straight years of business growth and profitability with more than 500 customers located in over 26 countries. We have developed capabilities, design, procedures and training staff to provide “Turn-Key” Insertion Devices (Undulators) and Magnetic Measurement Systems complete with in-house and customer site training.