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”)

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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

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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

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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)

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Clinometer calibration prototypeClinometer calibration prototype

calibrated linear mover

sensing liquid

Clinometer

Θ

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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)

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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)

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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)

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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

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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, …

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Even more loosely related newsEven more loosely related news

Then…

…now !

New Physics Building