muon endcap alignment analog sensor calibrations & software update samir guragain, marcus...
TRANSCRIPT
Muon Endcap AlignmentMuon Endcap Alignment
Analog Sensor Calibrations Analog Sensor Calibrations
& Software Update & Software Update
Samir Guragain, Marcus HohlmannFlorida Tech
October 2005
USCMS EMU meeting – Fermilab, Oct 21/22, 2005
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 2
ME Alignment SystemME Alignment System
R-sensors
Z-sensors
Note: only smallsample of analog sensors shown
ClinometersTransfer plate
DCOPS
To be featured in Physics TDR – Vol.1
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 3
OverviewOverview
• Update on analog sensors– Final calibration results for two types of Z-sensors– Final calibration results for Clinometers– ME1 proximity (PX) sensors
• Software preparation– Overall data flow– To do list– Plans for Magnet test
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 4
Recent activitiesRecent activities
• Built specialized calibration mounts for ME1 Z-, R-, proximity-sensors, ME4 R-sensors
• Calibrated all clinometers, Z-sensors and shipped to PSL/FNAL for mounting
• Initiated alignment software development activities during 1-month summer stay at LPC
• Graduated a CMS M.S. student
(Marion Ripert, now working with Laszlo Gutay at Purdue)
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 5
Progress updateProgress updateNote: Each sensor is sub- jected to 5 calibration runs
Total
in System
Calibrations completed
To do
R-sensors 84 60 24(ME1,4)
Z-sens., potentiometers
Z-sensors, lasers
72
12
72
12
Clinometers 48 48(6 spare)
ME1 Proximity sensors
72 0 72
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 6
Full set of Z-potentiometers: Full set of Z-potentiometers: Sensor-to-sensor variation Sensor-to-sensor variation
Abs ( )
Slopes:< ± 1% variation
Note: In the end, we will actually use fit results for response relative to a reference voltage: V(z)sensor/Vref
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 7
Full set of Z-potentiometers: Full set of Z-potentiometers: Relative errors on slopesRelative errors on slopes
%
Error on slopes [%]
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 8
ME1 Z-Laser sensorsME1 Z-Laser sensors
Linear Mover(“barrel”)
Z-laser sensor(“ME1”)
IR laser beamZ-potentiometer(“link to ME2”)
Diffusely reflectivesurface
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 9
Typical Z-laser response (ME1)Typical Z-laser response (ME1)Trial1 ME+1-TP3-ZLB11
Slope = 1.0062 (V/cm)
Error in slope = 0.00039 (V/cm)
-4
-2
0
2
Se
nso
r R
esp
on
se
(V
)
18161412Distance (cm)
Sensor Response vs Distance
Distance [cm]
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 10
Full set of Z-lasers: Full set of Z-lasers: Sensor-to-sensor variationSensor-to-sensor variation
Slopes:± 1% variation
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 11
Full set of Z-lasers: Full set of Z-lasers: Relative errors on slopesRelative errors on slopes
%
Error on slopes [%]
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 12
Typ. Clinometer responseTyp. Clinometer response
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
Se
nso
r R
esp
on
se (
V)
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12Angle (Deg)
Sensor Response vs Angle for + & - directions of ME+4 -15 deg X Clinometer
Negative Direction
Positive Directions
Angle [deg]
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 13
Full set of Clinometers: Full set of Clinometers: Sensor-to-sensor variationSensor-to-sensor variation
in X in Y
Slopes: ± 6% variation Note: Pos. and neg. inclinations are fitted separately; each device has two entries in each histogram.
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 14
Full set of Clinometers: Full set of Clinometers: Relative Errors on SlopesRelative Errors on Slopes
Errors on Slopes: 0.3%
in X in Y
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 15
Total Calibration Uncertainties
(specifications)
R-sensors ± 100 μm (< ± 430 μm)
Z-sensors ± 55 μm (< ± 1000 μm)
PX-sensors ± 55 μm
Clinometers ± 0.02o
Final numbers for all sensor types:
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 16
ME1 proximity sensorsME1 proximity sensors
Linear mover
2 prox. sensors
Precision reference bar
Prec. dowel pins
Calibrate 2 sensors simultaneously
Establish absolute reference distance
Ready to perform calibrations
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 17
Road to CompletionRoad to Completion
• Calibrate & deliver in this order:– ME+1 PX sensors – ME+1 R sensor– ME-1 PX sensors – ME-1 R sensors– ME±4 R sensors– Spare clinometers
• Document calibration project in CMS note
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 18
Alignment SoftwareAlignment Software• July 05: While at LPC, initiated contact with
Calibration, Alignment, Database (CalAliDB) working group – leadership: Lee Lueking (FNAL) &
Oliver Buchmüller (CERN)– Now: Tri-weekly meetings on alignment DB issues– Muon Barrel & Link people also participating– attempt to unify alignment software for
tracker and muon as much as possible– Fl. Tech working with Lee Lueking’s group
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 19
Data Structure & FlowData Structure & Flow
Offline reco
CSCdata
MUON TRACKS
Optical & analog
sensor raw
data
Optical & analog sensor
calibration data
COCOA:Alignment fits
(in CMSSW framework)
COCOAOUT
COCOAIN
CSC“Alignment
object”contains chamber
offsets…Δxi Δyi Δzi
Δαi Δβi Δγi...
Geometry Database
Magnet-off Photogrammetry
& Survey data Muon TriggerHLT, L1POOL-ORA object
(directly or via ascii)
POOL-ORA object
Format: Event data XML files
XML files (?)
As of October 2005
(auto-conversion of existing ascii geometry from old COCOA version – Pedro Arce)
(by hand – Dave Eartly?)
(by hand - Fl. Tech)
(Fl. Tech)
(Fl. Tech)
(Fl. Tech)
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 20
Integrated some analog Integrated some analog sensors into COCOAsensors into COCOA
Samir Guragain, MHLPC July 2005
back CSC
front CSC
DCOPS Representations of R-sensors
SLM reference
z
Note: Sensor sizes greatly exaggerated for visibility
Visualization output from COCOA alignment model
R-sensors
SLM:
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 21
To do listTo do list• Produce COCOA version in CMSSW (P. Arce)
• Develop COCOA-IN & COCOA-OUT (Fl. Tech + tracker?)
• Transform calibration data, sensor data, geometry,
survey data into database formats for use by COCOA
– Have started w/ strawman table for analog sensor calibration
– Need to verify nominal COCOA geometry against CAD files
and actual nominal on-detector geometry (Fl.Tech & D. Eartly)
• Understand COCOA performance for ME with magnet
test data
• create alignment object as output for offline reco use
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 22
Magnet testMagnet test
• Main goal (in my opinion): Get good data !
Mostly analyze it later …
• Ensure that ME+ alignment system is fully instrumented and can be read out– Planning to send Fl. Tech grad student Samir
Guragain to CERN for 5-6 months in January 2006 to help commission read-out;
get M&O support from Giorgio to do so
• Magnet-off photogrammetry (Dave Eartly)
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 23
Magnet test cont’dMagnet test cont’d• Test basic functionalities first:
– Do the controls work (e.g. lasers for SLMs) ?– Does the readout work? – Do raw sensor readings make sense
(magnet off vs. magnet on) ?– Does the raw data get written out properly in
event data format ?
• Suggested alignment exercise:– Move disks relative to each other and relative to
barrel by few mm and detect with Z-sensors with magnet off (is this even possible?)
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 24
Magnet test cont’dMagnet test cont’d
• Output parameters from COCOA fits for reconstruction:– 6 parameters per chamber:
• Δx, Δy, Δz displacements of chamber centers• Δα, Δβ, Δγ rotation of chambers
• Currently no plans to align at a lower level (strips, wires) with the hardware alignment system. Maybe later we can get more sophisticated once the basics are under control.
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 25
Summary & OutlookSummary & Outlook
• Calibration of Clinometers and Z- sensors done.
Keep on calibrating R- and PX. Finish soon !
• Software side of alignment gaining momentum.
Jump into it full-time as soon as hardware done.
Lots to do.
• Help commission alignment DAQ at CERN starting
early 2006.
10/22/2005 M. Hohlmann - EMU meeting at Fermilab 26
Loosely related newsLoosely related news
Florida Tech
Friday afternoon