Analog Alignment Sensors Status report – April 2004 Marcus Hohlmann Florida Tech

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 2 Activities 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 back & front chambers “up” = front chamber “down = back chamber”

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 4 R-sensor positions & mounts DCOPS & R-sensor mounted on tower DCOPS & R-sensor mounted on plate Straight Line Monitor To transfer plate with R-post ME 2-2 ME 2-1 R-post R-sensors ME-2 example: CAD Drawing by FNAL “down” “up” wire

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 5 R-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 for towers

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 6 Calibration bench: Reality

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 7 R-sensor calibration Defined 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) V sensor (d) Will calibrate over range Δd ≈ 3 cm Top view possible true radial direction possible SLM line

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 8 SLM Clinometers in alignment system Clinometers monitor inclination of alignment transfer plates 15 o 75 o -45 o Transfer plates are mounted at 6 different angles in φ

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 9 Clinometer 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 horizontal 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 prototype calibrated linear mover sensing liquid Clinometer Θ

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 11 Clinometer calibration Calibrated moving table Jig Final design Clinometer mount (mounts in 2 pos. for calibrating tilts in x and y) Red surface indicates position of clinometer spring-loaded base plate All 3-D clinometer drawings: T. Moschoutis (Fl. Tech)

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 12 Mounting Clinometers for calibration (1) 45 o clinometer mount 75 o clinometer mount 15 o clinometer mount Jig #1 for mounting 3 clinometer mounts onto calibration device Clinometers mount onto horizontal red 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 Clinometers for calibration (2) Clinometers mount onto horizontal red surfaces Mounts: Wisconsin / FNAL Jigs: in production at Fl. Tech 15 o clinometer mount Jig #4 for mounting -45 o mount Jig #2 for mounting -75 o mount Jig #3 for mounting -15 o mount All 3-D clinometer drawings: T. Moschoutis (Fl. Tech)

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 14 Base 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 0.01 o = mrad clinometer resolution)

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 15 Other 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 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

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 16 Calibration 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 issues ProgressProgress –Fl. Tech/CMS MoU for EMU in place since 3/3/04 –SoW for EMU work in FY04 in place since 3/26/04 –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 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)…

4/16/2004 M. Hohlmann - EMU meeting at Ohio State University, Columbus 18 Loosely 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 news Then… …now ! New Physics Building