LARP Phase II Secondary Rotatable Collimator

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LARP Phase II Secondary Rotatable Collimator

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LARP Phase II Secondary Rotatable Collimator

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Presentation transcript:

LARP Phase II Secondary Rotatable Collimator 5 min. Status Report 15th March, 2010

CMM results: First Jaw (RC-0) Lots of data produced by CMM group. Summary: Looking at central 8 mm of each facet (all the beam will see) Worst facet flatness: 50.6 microns Average: 38.5 microns Std dev: 10.3 microns Generally exhibits a bowed shape where outer edges flair out

CMM results: Second Jaw (RC-1) Second Jaw (RC-2) was machined to much greater precision Summary: Worst Facet: 10.8 microns! Average: 8.25 Std Dev: 1.45 This is excellent!

Facet offset and angles Also measured width between each pair of facets and concentricity about rotation axis for RC-0 and RC-1. This will give the new jaw edge with respect to beam axis after jaw rotation Concentricity comparable to flatness values in previous slides RC-1 much better than RC-0 This says that there is little run-out and flatness dictates alignment of facets. Angles of each facet also measured and within arcseconds of a perfect icosagon (20 sided polygon)

For BPM people: BPM Clearance for connectors Oliver requested we provide some figures showing the access space around the BPMs for connectors. Here are some pictures:

End view wiring clearances