Results of stretched wire field integral measurements on the mini-undulator magnet -- comparison of results obtained from circular and translational motion of the integrating wire

Technical Report · Fri May 01 04:00:00 EDT 1998

DOI:https://doi.org/10.2172/639797· OSTI ID:639797

Solomon, L

Measurements of the multipole content of the Mini-Undulator magnet have been made with two different integrating wire techniques. Both measurements used 43 strand Litz wire stretched along the length of the magnet within the magnet gap. In the first technique, the wire motion was purely translational, while in the second technique the wire was moved along a circular path. The induced voltage in the Litz wire was input into a Walker integrator, and the integrator output was analyzed as a function of wire position for determination of the multipole content of the magnetic field. The mini-undulator magnet is a 10 period, 80 mm per period hybrid insertion device. For all the data contained herein the magnet gap was set at 49 mm. In the mini-undulator magnet, the iron poles are 18mm x 32mm x 86 mm, and the Samarium Cobalt permanent magnet blocks are 22mm x 21mm x 110mm. For this magnet, which is a shortened prototype for the NSLS Soft X-Ray Undulator Magnet, the undulator parameter K = 0.934 B (Tesla){lambda}(cm), and B(tesla) = 0.534/sinh({pi}Gap/{lambda}). At a gap of 49 mm, the magnetic field is 1590 Gauss.

• Research Organization: Brookhaven National Lab., National Synchrotron Light Source, Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 639797
• Report Number(s): BNL--65605; ON: DE98002991; BR: KC0204011
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATOR FACILITIES
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
MEASURING METHODS
MULTIPOLES
WIGGLER MAGNETS