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Cocoa Plans


First studies with ME 1. Fitting all 6 HSLM at once ... Goal: Run side Cocoa fit using ME 1 DCOPS and analog systems and at least some ... – PowerPoint PPT presentation

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Title: Cocoa Plans

Cocoa Plans
James N. Bellinger University of
Wisconsin-Madison 13 February 2008
Cocoa Plans
  • Working with Cocoa and ME1
  • Cocoa with root input

General Findings w/ ME2/SLM2
  • The laser error was 0.200 microns instead of 200
    microns ? Fit tried to keep the laser at the
    default position come hell or high water.
  • Including the offsets and pixel calibrations
    reduced the measurement contribution to the chi
    squared by about 5

First studies with ME1
  • Fitting all 6 HSLM at once
  • Internally treated as 3 SLM with only partial
    info for each laser
  • Default MAB and DISTANCEMETER values for now
  • From original Maeshima file
  • Data from 10-Nov-2006, pixel-size corrected

ME1 dataset isnt ideal
  • It was handy
  • 3 DCOPS had no data
  • Of remaining 84 profiles
  • 6 were shadowed
  • 4 were saturated
  • 3 had low signals

First Pass Results Cocoa
  • Tried to move 11 CCDs more than 400 microns
  • Tried to change the upCCDXtoDowel2 etc on several
    transfer plates
  • (not correlated with the above shift!)
  • 2nd item suggestive Put in calibrated offsets

With Calibrated Offsets
  • Cocoa tried to move chamber 1/3/9 by over 14
    meters and twist it around
  • Serious stability problem here
  • No obvious errors in SDF file
  • Looking for pilot error

Cocoa ME1 Plans
  • Understand/fix stability problem
  • Day?
  • Use better data
  • ½ day
  • Mock up data for and vary included devices to
    study effects
  • ½ day
  • Locate data for included devices and test
  • ½ day
  • Mock up non-included devices, esp. tilt meters
  • Week? 2 Weeks?
  • Locate data for these and test
  • 2 days?

Connect with Link System
  • Goal Run side Cocoa fit using ME1 DCOPS and
    analog systems and at least some subset of the
    Link system
  • DCOPS Z-sensors
  • DCOPS Z-sensors minimal set of Link
  • Add tilt meters
  • Add R-sensors
  • Add as much of Link as reasonable
  • No simultaneous and side DCOPS yet

Root input to Cocoa
  • Discovered that what I earlier thought was good
    output wasnt. Not all DCOPS root data was
    getting into Cocoa data structures
  • Must revisit this required for final operation
  • Cocoas default operation is to read input data
    event by event and try to converge on a final fit
    of simulated positions.
  • Not ideal for our debugging work
  • ?Root input is not a high priority for our
  • Scripts to create text file data exist for final
  • Scripts to create files from MTCC data need