The X25 MGU is part of the NSLS Accelerator Division's Undulator Development Program

Mini-gap undulators are under active development in the NSLS Accelerator Division since the early 1990s.   A first mini-gap in-vacuum devices resulted from a collaboration with SPring-8.   Two recently constructed and nearly identical NSLS MGUs now serve in the X13 and X29 straight sections, and the MGU at X25 anticipates features of a next development step to produce a cryogenic MGU for X9.

For additional info about NSLS IDs and NSLS MGU development visit the links to: NSLS Accelerator Division Undulator Literature

PSGU IVUN MGU CPMU

Prototype Small Gap Undulator In Vacuum UNdulator Mini Gap Undulator Cryogenic Perm. Magnet Undulator

Device	PSGU (1993)	IVUN (1997)	MGU (2002)	MGU (2003)	MGU (2006)	CPMU (2006)
Status	retired from X13	retired from X13	in service X13	in service X29	in service X25	in design X9
Type	Pure PM	Pure PM in vacuum	Hybrid PM in vacuum	Hybrid PM in vacuum	Hybrid PM in vacuum	Cryo PM in vacuum
Period	1.6 cm	1.1 cm	1.25 cm	1.25 cm	1.8 cm	1.35 cm
Full Periods	18	30.5	27	27	55	24
MGU Length	0.33 m	0.33 m	0.36 m	0.36 m	0.99 m	0.34 m
Nominal Gap	6.0 mm	3.3 mm	3.3 mm	3.3 mm	5.6 mm	3.3 mm
Peak Field	0.62 T	0.68 T	0.92 T	0.92 T	0.90 T	1.3 T
K max	0.93	0.7	1.07	1.07	1.52	1.6
Fundamental E   at 2.8 GeV	3.2 keV	5.4 keV	3.7 keV	3.7 keV	1.9 keV	2.4 keV

Updated 14 March 2006	Security Notice   Webteam   Site Map   Bio   PXRR   NSLS   BNL