analog alignment sensors status report – april 2004 marcus hohlmann florida tech
TRANSCRIPT
Analog Alignment SensorsAnalog Alignment Sensors
Status report – April 2004Status report – April 2004
Marcus Hohlmann
Florida Tech
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 2
Activities since last meetingActivities since last meeting
• Florida Tech alignment group met with Dave Eartly on campus Feb 11 & 12
• Worked out exact calibration goals & procedures and a tentative schedule
• Final calibration setup being designed and built
• Current focus on R sensors and clinometers (most “complex”)
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 3
Radial alignment across Radial alignment across back & front chambersback & front chambers
“up” = front chamber
“down = back chamber”
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R-sensor positions & mountsR-sensor positions & mounts
DCOPS & R-sensor mounted on tower
DCOPS & R-sensor mounted on plate
Straight L
ine Monitor
To transferplate with R-post
ME 2-2
ME 2-1
R-post
R-sensors
ME-2 example:
CAD Drawing by FNAL
“down”
“up”
wire
wire
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R-sensor calibration benchR-sensor calibration bench
Linear mover(6 μm step size)
DCOPS & R-sensor mounting towers (“left” & “right”)
Base with dowel pins for attaching DCOPS & R-sensor mounting plates (“left” & “right”)
Dowel holes of mounting plate or tower in line with mover axis
low R-post
high R-post
3D drawing by M. Ripert (Fl. Tech)
Florida Tech calibration bench
Base fortowers
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Calibration bench: RealityCalibration bench: Reality
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R-sensor calibrationR-sensor calibrationDefined the distance d that will be calibrated:
linear mover
R-sensor(wire extension potentiometer)
precision
dowel hole
(known in CMS geometry)
direction of motion
R-post(precision dowel pin)
Distance d we will calibrate:“center R-post to center dowel hole”
Mounting plate or tower
extended wire
d
• Calibration will produce (non-linear) Vsensor(d)
• Will calibrate over range Δd ≈ 3 cm
Top view
possible true radial directionpossible SLM line
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 8
SLM
Clinometers in alignment systemClinometers in alignment system
Clinometers monitor inclination of alignmenttransfer plates
15o
75o
-45o
Transfer plates are mounted at 6 differentangles in φ
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 9
Clinometer mountsClinometer mounts
6 different mounts accommodate various angles of transfer plates, so that null-positions of clinometers are horizontal
Mount production: Wisconsin / FNAL
Clinometers mount onto Clinometers mount onto horizontal red surfaceshorizontal red surfaces
All 3-D clinometer drawings: T. Moschoutis (Fl. Tech)
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 10
Clinometer calibration prototypeClinometer calibration prototype
calibrated linear mover
sensing liquid
Clinometer
Θ
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 11
Clinometer calibrationClinometer calibration
Calibrated moving table
Jig
Final design
Clinometermount
(mounts in 2 pos. for calibrating tilts in
x and y)
Red surfaceindicatesposition ofclinometer
spring-loaded base plate
All 3-D clinometerdrawings:T. Moschoutis(Fl. Tech)
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 12
Mounting ClinometersMounting Clinometersfor calibration for calibration (1)(1)
45o clinometer mount
75o clinometer mount
15o clinometer mountJig #1 for mounting 3 clinometermounts onto calibration device
Clinometers Clinometers mountmountonto horizontalonto horizontalred surfacesred surfaces
• Mounts:
Wisconsin / FNAL
• Jig:
in production at
Fl. Tech
All 3-D clinometer drawings: T. Moschoutis (Fl. Tech)
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 13
Mounting ClinometersMounting Clinometersfor calibration for calibration (2)(2)
Clinometers mount Clinometers mount onto horizontal onto horizontal red surfacesred surfaces
• Mounts:
Wisconsin / FNAL
• Jigs:
in production at
Fl. Tech
15o clinometer mount
Jig #4 for mounting -45o
mountJig #2 for mounting -75o mount
Jig #3 for mounting -15o mountAll 3-D clinometer drawings: T. Moschoutis (Fl. Tech)
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 14
Base plate levelingBase plate leveling• Use Surveyor’s Laser Level to find true horizontal position for base plate
• Expected leveling precision: 0.1 mrad (0.5 mm over 5 m) (compare to 0.01o = 0.175 mrad clinometer resolution)
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Other progressOther progress
• Calibration DAQ– Replaced RS232 serial line for PC – Agilent Multimeter
communication with parallel GPIB interface to avoid LabView buffer overruns
• COCOA alignment program– student Sara Walker has compiled latest greatest
COCOA version 3.2.1 on CMS cluster at FNAL– slow progress: compiler problems, version changes, …– made deal with Robert Lee: help in exchange for writing a
COCOA user manual– getting help from Pedro Arce at CERN
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Calibration scheduleCalibration schedule• May 4, 04
– UW/FNAL (Dave in person) delivers to Fl. Tech at least one final mount with sensor attached for every type
• by mid-June – Fl. Tech finalizes calibration setups for all sensor types
• mid-June– Fl. Tech starts calibrating sensors for ME-2
• by early September– Fl. Tech has calibrated all ME-2 sensors (=1/8 of total)
• mid-September– Ship calibrated sensors to CERN for installation on ME-2
• September 04 - … 2005– Fl. Tech continues calibrations & delivery for other disks
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 17
Management issuesManagement issues• ProgressProgress
– Fl. Tech/CMS MoU for EMU in place since 3/3/04Fl. Tech/CMS MoU for EMU in place since 3/3/04– SoW for EMU work in FY04 in place since 3/26/04SoW for EMU work in FY04 in place since 3/26/04– Fl. Tech accounting waiting for FNAL P.O. …Fl. Tech accounting waiting for FNAL P.O. …
• External Funding– NSF turned us down:
• very positive on technical issues in proposal• But: “viability” issues: new group, small group, …• 9% cut for HEP @ NSF for FY04• Insufficient support from CMS (letters not enough !)• NSF recommends strengthening cooperation with other
Florida Institutions ( UF !) & starting physics preparation• Will try again for fall (DOE/NSF)…
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Loosely related newsLoosely related news
• Have formed a “GRID group” at Fl. Tech: – working with 6 other faculty (4 CS, 2 IT, 2 math)– ante a 48 node Beowulf cluster to join Grid2003 ?!– LB & MH interested in CMS software:
• development of software alignment tools• get involved in PRS Muon → physics with muons• possibly ride the tail end of ‘Data Challenge 04’ ?!
– CS & IT people interested in developing
grid middleware & other grid infrastructure:• privacy• process mobility, swarm intelligence, …
4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 19
Even more loosely related newsEven more loosely related news
Then…
…now !
New Physics Building