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.