skeleton: hardware alignment for emu meeting james n bellinger 15-mar-2009
TRANSCRIPT
Skeleton: Hardware Alignment for EMU meeting
James N Bellinger
15-Mar-2009
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
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
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
5
Muon Endcap Hardware AlignmentPreliminary
zglobal
rglobal
CMS Side view
NominalCSC
position
x= 0
NominalCSC position
Not toscale
Pink: Aligned by Tracker-Muon Link system
Blue: Aligned by Muon Endcap
Optical System
Red: Notaligned yet
x = 0
<x>:3.9mrad
ME+1/3,2/2,3/2:
Δz:-5 mm to IPglobally
<ΔzME+1/1>:-17.57 mm
<ΔzME-1/1>:16.73 mm
nom.
<ΔzME+1/2>:-5.04 mm
x>1.3mrad
<ΔzME-1/2>:5.94 mm
<ΔzME-2/1>:13.18 mm
<ΔzME-3/1>:12.60 mm
<ΔzME-4/1>:12.89 mm
<ΔzME+2/1>:-12.58 mm
<ΔzME+3/1>:-12.35 mm
<ΔzME+4/1>:-12.46 mm
<x>:3.7mrad
<x>:3.4mrad
<x>:3.9mrad
<x>:4.7mrad
<x>:3.6mrad
<x>:4.2mrad
<x>:3.4mrad
<x>:3.4mrad
<x>:3.5mrad
nom.
<x>:4.4mrad
< x>:4.4mrad
← Muon Endcap stations →ME+1ME+2ME+3ME+4 ME-1 ME-2 ME-4ME-3
ME-1/3,2/2,3/2:
Δz:+5 mm to IPglobally
<ΔzME+1/3>:-2.2 mm
Green: Notblessed yet
ME+2 SLM 2-5 in Z with 10 measurements at B=0T
Laser hits on CCDs ME+2 SLM 2-5 in Z at B=0T
Chamber surface estimates
Red=RealGreen=Sim
MAB ASPD
ME12 ASPD
ASPD P4
Distancemeter and dists
IR target
DCOPS dowels
Animated
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
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
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
Close CMS
Bi weekly MWGR
weekly MWGRCRUZET Sw & w/o tracker
CR
AF
TS
Adjust LD-
LHC dev.
collisions
DT StandAlone
align
Alignment Work PlanAlignment Work Plan
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Barrel H
W G
eom
En
dcap
HW
G
eom
Full Link @ B=3.8T
AR vs. TK survey+tracks
r correction
CS
C alig
n
w/co
smics
DT alignwith 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
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
But
• Some tasks will be done for the first time in May: Transfer Line inclusion, for example.