Title :
Upgrade alternatives for the nsls superconducting wiggler
Author :
Fedurin, M. ; Mortazavi, P. ; Murphy, J. ; Rakowsky, G.
Author_Institution :
Brookhaven Nat. Lab., Upton
Abstract :
The superconducting wiggler (SCW) with 4.2 Tesla field in 5 main poles has been in operation on the NSLS X-ray storage ring for more than 20 years. The inefficient cryogenic system of this wiggler uses a closed-cycle refrigerator requiring constant maintenance. It is possible to replace this insertion device with a 13-pole SCW originally built by Oxford Instruments. The cryostat of this device could be upgraded to reduce the liquid He consumption using cryocoolers, thereby greatly reducing the refrigerator operating expense. A second option is a new design of a SCW featuring internal chicaning.to serve three user beamlines simultaneously All these upgrade possibilities will be described in the paper.
Keywords :
accelerator magnets; beam handling techniques; cryogenics; storage rings; wigglers; NSLS superconducting wiggler; Oxford instruments; X-ray storage ring; beamlines; closed-cycle refrigerator; cryocoolers; cryogenic system; insertion device; internal chicane; liquid helium; magnet system; Cryogenics; Helium; Instruments; Magnetic fields; Magnetic flux; Magnetic heads; Radiation safety; Refrigeration; Superconducting magnets; Undulators;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441074
