Increasing Extraction Efficiency of Au77+ Beam Using H20 (AGS Studies Report No. 341)

Abstract

In the FY95 HIP run the attempt was made to insert H20 and see how much we could increase the extraction efficiency for the 11.8 GeV/c/n Au77+ beam in the AGS. These attempts failed to provide any significant increase in the extraction efficiency. In May 1995 it was found that some of the sextupoles in the AGS had shorted windings. It is now believed that the poor extraction efficiencies for the HIP run were due to the bad sextupoles. In order to gain some confidence that this was a reasonable hypothesis we again inserted H20 to see how good we could make the extraction efficiency for the Au77+. The test is important because there was uncertainty about how efficient we could be. The uncertainty arises from not knowing how much beam loss to expect from the stripping of the last two electrons from scraping against various apertures in the extraction process. Also it was not known how much beam loss to expect from the stripping with H20 inserted. In general it was expected that losses from these mechanisms should be very small, but they are very difficult to quantify. During the shutdown prior to the FY96 HIP run the bad sextupoles were fixed. We found in general that we could achieve higher extraction efficiency than we could in the past (able to get over 70 % while in past runs we had difficulty getting over 50 %).

Related Papers

• The Method for Extraction of Curcumin in Curcuma Aromatica with Cellulose Enzymolysis(2004)
• Optimal Extraction Conditions of Collagen from Jellyfish(2008)
• Study on resveratrol from red skin of peanut by alkaline extraction method(2009)
• The Optimum Extraction Technology of β-carotene from Rhodotorula benthica by DMSO Method(2011)
• Extraction of Pigment from the Flowers of Pyrostegia ignea Presl and its Stability(2010)