Presentations of LCU meeting on upgrade studies on 5/09/2007
Long range compensation for phase 1 IR upgrade -> U. Dorda (pdf file)
The modular optics was not included in the study. However, as the number of long-range beam-beam encounters is even higher than for the Compact (25 instead of 21), the performance will be worse.
Aperture requirements for the three upgrade layouts -> R. de Maria (pdf file)
This study was triggered by the results of the analysis made by SF on the aperture requirements for an optics based on the current insertion layout with beta* decreased to 0.25 m.
Rotation of beam screen in Q4 and Q5 should fix or alleviate the problem with aperture.
Evaluation of the aperture requirements for D1 and D2 should be performed.
Evaluation of maximum aperture gain with new Q4 and Q5 (taking into account the constraints from the two-in-one design) should be performed.
Last update: 5-September-07
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