A polarized beams project at ISAC

✍ Scribed by C.D.P. Levy; R. Baartman; K. Jayamanna; R. Kiefl; T. Kuo; M. Olivo; G.W. Wight; D. Yuan; A.N. Zelenski

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 107 KB
• Volume: 701
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)01593-7

✦ Synopsis

A polarizer beam line at the radioactive beams facility ISAC at TRIUMF is nearly complete. Initially for 8 Li + ions for β-NMR studies in condensed matter, it can in principle supply three or more experiments simultaneously, and the technique used is practicable with all alkali-metal ion beams. An atomic beam, created with over 90% efficiency by passing the initial unpolarized 30 keV beam through a sodium vapor jet target, will be polarized by colinear optical pumping. A novel feature is that the atomic beam is reionized with demonstrated high efficiency in a helium gas target. The emittance growth through the helium cell has been measured for stable 7 Li + beam on a test stand and found to be small. We report these measurements as a function of helium flow rates. A preliminary polarized 8 Li + run is planned for May, 2000.