Muon endcap alignment analog sensor calibrations software update
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

Muon Endcap Alignment Analog Sensor Calibrations & Software Update PowerPoint PPT Presentation


  • 65 Views
  • Uploaded on
  • Presentation posted in: General

Muon Endcap Alignment Analog Sensor Calibrations & Software Update . Samir Guragain, Marcus Hohlmann Florida Tech October 2005. USCMS EMU meeting – Fermilab, Oct 21/22, 2005. ME Alignment System. Transfer plate. Z-sensors. Clinometers. Note: only small sample of analog sensors shown.

Download Presentation

Muon Endcap Alignment Analog Sensor Calibrations & Software Update

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Muon endcap alignment analog sensor calibrations software update

Muon Endcap AlignmentAnalog Sensor Calibrations & Software Update

Samir Guragain, Marcus Hohlmann

Florida Tech

October 2005

USCMS EMU meeting – Fermilab, Oct 21/22, 2005


Me alignment system

ME Alignment System

Transfer plate

Z-sensors

Clinometers

Note: only small

sample of analog

sensors shown

R-sensors

DCOPS

To be featured in Physics TDR – Vol.1

M. Hohlmann - EMU meeting at Fermilab


Overview

Overview

  • 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

M. Hohlmann - EMU meeting at Fermilab


Recent activities

Recent 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)

M. Hohlmann - EMU meeting at Fermilab


Progress update

Progress update

M. Hohlmann - EMU meeting at Fermilab


Full set of z potentiometers sensor to sensor variation

Full set of Z-potentiometers: Sensor-to-sensor variation

Slopes:

< ± 1% variation

Abs (

)

Note: In the end, we will actually use fit results for response relative to a reference voltage: V(z)sensor/Vref

M. Hohlmann - EMU meeting at Fermilab


Full set of z potentiometers relative errors on slopes

%

Full set of Z-potentiometers: Relative errors on slopes

Error on slopes [%]

M. Hohlmann - EMU meeting at Fermilab


Me1 z laser sensors

ME1 Z-Laser sensors

Z-laser sensor

(“ME1”)

Linear Mover

(“barrel”)

IR laser beam

Z-potentiometer

(“link to ME2”)

Diffusely reflective

surface

M. Hohlmann - EMU meeting at Fermilab


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)

Distance [cm]

M. Hohlmann - EMU meeting at Fermilab


Full set of z lasers sensor to sensor variation

Full set of Z-lasers: Sensor-to-sensor variation

Slopes:

± 1% variation

M. Hohlmann - EMU meeting at Fermilab


Full set of z lasers relative errors on slopes

%

Full set of Z-lasers: Relative errors on slopes

Error on slopes [%]

M. Hohlmann - EMU meeting at Fermilab


Typ clinometer response

Typ. Clinometer response

Angle [deg]

M. Hohlmann - EMU meeting at Fermilab


Full set of clinometers sensor to sensor variation

Full set of Clinometers: Sensor-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.

M. Hohlmann - EMU meeting at Fermilab


Full set of clinometers relative errors on slopes

Full set of Clinometers: Relative Errors on Slopes

in X

in Y

Errors on Slopes: 0.3%

M. Hohlmann - EMU meeting at Fermilab


Total calibration uncertainties

Total Calibration Uncertainties

Final numbers for all sensor types:

(specifications)

R-sensors± 100 μm (<± 430 μm)

Z-sensors± 55 μm (< ± 1000 μm)

PX-sensors± 55 μm

Clinometers± 0.02o

M. Hohlmann - EMU meeting at Fermilab


Me1 proximity sensors

ME1 proximity sensors

Ready to perform calibrations

2 prox. sensors

Linear mover

Establish absolute reference distance

Prec. dowel pins

Precision reference bar

Calibrate 2 sensors simultaneously

M. Hohlmann - EMU meeting at Fermilab


Road to completion

Road 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

M. Hohlmann - EMU meeting at Fermilab


Alignment software

Alignment 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

M. Hohlmann - EMU meeting at Fermilab


Data structure flow

CSC

data

Optical & analog

sensor rawdata

Geometry

Database

COCOA

IN

COCOA:

Alignment fits

(in CMSSW framework)

COCOA

OUT

Offline

reco

Muon

Trigger

HLT, L1

POOL-ORA object

Format: Event data

XML files (?)

POOL-ORA object

(directly or via ascii)

XML files

Optical & analog sensor calibration

data

Data Structure & Flow

As of October 2005

(auto-conversion of existing ascii geometry

from old COCOA version – Pedro Arce)

CSC

“Alignment object”

contains chamber offsets

…Δxi Δyi Δzi

Δαi Δβi Δγi...

(Fl. Tech)

(Fl. Tech)

(Fl. Tech)

Magnet-off

Photogrammetry

& Survey data

MUON

TRACKS

(by hand –

Dave Eartly?)

(by hand - Fl. Tech)

M. Hohlmann - EMU meeting at Fermilab


Integrated some analog sensors into cocoa

Integrated some analog sensors into COCOA

Note: Sensor sizes greatly

exaggerated for visibility

SLM:

z

DCOPS

R-sensors

Representations

of R-sensors

front CSC

SLM reference

Visualization output from

COCOA alignment model

back CSC

Samir Guragain, MH

LPC July 2005

M. Hohlmann - EMU meeting at Fermilab


To do list

To 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

M. Hohlmann - EMU meeting at Fermilab


Magnet test

Magnet 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)

M. Hohlmann - EMU meeting at Fermilab


Magnet test cont d

Magnet 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?)

M. Hohlmann - EMU meeting at Fermilab


Magnet test cont d1

Magnet 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.

M. Hohlmann - EMU meeting at Fermilab


Summary outlook

Summary & 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.

M. Hohlmann - EMU meeting at Fermilab


Loosely related news

Loosely related news

Friday afternoon

Florida Tech

M. Hohlmann - EMU meeting at Fermilab


  • Login