Results from luminosity scans during the rhic 2000 run.

[摘要] During the year 2000 run a total of eight beam scans (Vernier Scans) were performed at various interaction points (IF) at RHIC. During a Vernier Scan the experimental collision rates are recorded while the beams are stepwise scanned across each other. Vernier Scans yield transverse beam sizes as well as maximum luminosity and thus the absolute cross section, which with the limited data from the 2000 run we measured to be (sigma) = 8.9 (+-) 0.3 barn at ((radical)s(sub NN)) = 130 GeV. Also, Vernier Scans permit performance studies of the beam orbit control and local coupling.

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] Brookhaven RHIC;Vernier chronotrons;Luminosity;Collisions;Orbits