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Published byLucas Heath Modified over 9 years ago
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Skeleton: Hardware Alignment for EMU meeting James N Bellinger 15-Mar-2009
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Things to add Time estimates for repeating the work in May (and August) Time estimates for work TBD: –Transfer Lines –Barrel –Barrel to Endcap Pix from Barrel progress Stuff I’ve forgotten in the skeleton
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What we Have Now Link on Plus side Some Link on Minus (serious disk misalignment!) Link to MABs Z for ME+2,3,4, ME-2,3,4, ME+1/2 Z for ME+1/3 about to be blessed Some barrel numbers
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Want pix of Marcus’ chamber tilts, updated w/ ME+1/3 –Check Illustrative barrel Z variation w/ field Fit plots for ME+1 –Check Fit plots for ME+2 –Check
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5 Muon Endcap Hardware Alignment Preliminary z global r global CMS Side view Nominal CSC position x = 0 Nominal CSC position Not to scale Pink: Aligned by Tracker-Muon Link system Blue: Aligned by Muon Endcap Optical System Red: Not aligned yet x = 0 : 3.9mrad ME+1/3,2/2,3/2: Δz:- 5 mm to IP globally : -17.57 mm : 16.73 mm nom. : -5.04 mm x > 1.3mrad : 5.94 mm : 13.18 mm : 12.60 mm : 12.89 mm : -12.58 mm : -12.35 mm : -12.46 mm : 3.7mrad : 3.4mrad : 3.9mrad : 4.7mrad : 3.6mrad : 4.2mrad : 3.4mrad : 3.4mrad : 3.5mrad nom. : 4.4mrad : 4.4mrad ← Muon Endcap stations → ME+1 ME+2ME+3ME+4ME-1ME-2ME-4ME-3 ME-1/3,2/2,3/2: Δz:+ 5 mm to IP globally : -2.2 mm Green: Not blessed yet
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ME+2 SLM 2-5 in Z with 10 measurements at B=0T
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Laser hits on CCDs ME+2 SLM 2-5 in Z at B=0T
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Chamber surface estimates Red=Real Green=Sim MAB ASPD ME12 ASPD ASPD P4 Distancemeter and dists IR target DCOPS dowels Animated
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In the pipeline 1.Some X/Y information for ME+/- separately 2.Barrel muon 3.ME-1 4.Refit Endcap using relative X/Y info from step 1 5.Proof of principle linking MAB with Endcaps via Transfer Lines
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Hardware-dependant Minus side Link –Disks so badly assembled that components couldn’t talk to each other! MAB DCOPS X/Y End-to-end X/Y –Better care assembling disks –Requires some adjusting of the lasers
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Order of Tasks for Endcap Independent validation of data quality in all detectors Stand-alone reconstruction of SLMs and Transfer Lines When Link results are available: Big Bang
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Close CMS Bi weekly MWGR weekly MWGR CRUZET S w & w/o tracker CRAFTS Adjust LD- LHC dev. collisions DT StandAlone align Alignment Work Plan Alignment Work Plan Mar Apr May Jun Jul Aug Sep Oct Nov Dec Barrel HW Geom Endcap HW Geom Full Link @ B=3.8T AR vs. TK survey+tracks r correction CSC align w/cosmics DT align with collision tracks CSC align with collision tracks Full Barrel HW Geom @ B=3.8T Full Endcap HW Geom @ B=3.8T Integrated HW Geom @ 3.8T Integrated HW + track-based Geom Full Link Geom @ 0T Full Barrel HW Geom @ 0T Full Endcap HW Geom @ 0T Integrated HW Geom @ 0T DT align with CRAFT2 cosmics CSC align with CRAFT2 cosmics
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Time Estimates IFF –the disks were assembled with reasonable accuracy AND –there were no major hardware failures THEN repeating the work with fresh data in May should be quick—order of a week or two (?) Doing it again in August should be very much easier
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But Some tasks will be done for the first time in May: Transfer Line inclusion, for example.
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