Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.024 seconds
AbstractAbstract
[en] During the commissioning of EBIS beams in Booster in November 2010 and in April, May and June 2011, it was found that the transverse emittances of the EBIS beams just upstream of Booster were much larger than expected. Beam emittances of 11π mm milliradians had been expected, but numbers 3 to 4 times larger were measured. Here and throughout this note the beam emittance, πε0, is taken to be the area of the smallest ellipse that contains 95% of the beam. We call this smallest ellipse the beam ellipse. If the beam distribution is gaussian, the rms emittance of the distribution is very nearly one sixth the area of the beam ellipse. The normalized rms emittance is the rms emittance times the relativistic factor βγ = 0.06564. This amounts to 0.12π mm milliradians for the 11π mm milliradian beam ellipse. In (1) we modeled the injection and turn-by-turn evolution of an 11π mm milliradian beam ellipse in the horizontal plane in Booster. It was shown that with the present injection system, up to 4 turns of this beam could be injected and stored in Booster without loss. In the present note we extend this analysis to the injection of larger emittance beams. We consider only the emittance in the horizontal plane. Emittance in the vertical plane and the effects of dispersion are treated in (2).
Primary Subject
Source
10 Oct 2011; 45 p; KB0202011; AC02-98CH10886; Available from http://www.bnl.gov/isd/documents/76857.pdf; PURL: https://www.osti.gov/servlets/purl/1029589/; doi 10.2172/1029589
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue