Field modeling

1 / 6

# Field modeling - PowerPoint PPT Presentation

Field modeling. J. Nelson 2/2/05 Tracking support meeting. Since we last met. Put out action items http://www-hep.physics.wm.edu/~jkn/minos/tracking/0501_tracking.txt Please send comments and corrections. More progress. Francisco will be liaison with Bob Wands on modeling

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Field modeling' - xia

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

### Field modeling

J. Nelson

2/2/05

Tracking support meeting

Since we last met
• Put out action items

http://www-hep.physics.wm.edu/~jkn/minos/tracking/0501_tracking.txt

More progress
• Francisco will be liaison with Bob Wands on modeling
• Bob well on the way to a variable slots model
• Gets rid of one functional B-B’ mapping for variable gaps
• Strategizing on the end effects model
• Geometry limited by number of elements
• Partial slots and gap
• Gap & no slots
• Fall back position is no gaps & no slots
• Would need to treat the end model as a correction to original
• Need to spec the conductor path in ISM gap
• JKN & Francisco
• Useful for mass distribution in the new geometry too
• (see next page)
Bfield interfaces
• Talked to Robert…
• Put in Jeff’s variable gap B -> B’ with parameters
• Put in Jeff’s B-H variation model (also B->B’) with parameters for all plates
• Plane by plane overall scale factors
• Will eventually be results of
• Bdot correction * Bdot calibration * global correction
• 1st is the hysteresis data from the bdot system
• 2nd is the channel-to-channel calibration of the bdot ADCs
• 3rd muon calibration for the SM1/SM2/ND from range vs curvature
• Put in Erik’s collar and coil models with parameters
• Provision for Robert’s field admixture model for effects
• Need to have plate-by-plate B->B’ mappings for B-H curve corrections
• Eventually interface to DB table for B-H and construction information about what heat is were in a plane
• Provision for modeling the air field in the SM gap in 6cm planes of air
• Is this easy ???
Bdot system
• Coordination meeting on Tuesday
• Francisco has verified the can use same code for ND & FD coil control (life gets easier)
• Bench test up an running at W&M
• Keith (W&M UG), Francisco, and Jason Koskinen working on merging various code
• Jason’s revisions to output table and timing
• Jason’s input table methods
• Keith’s drift calibration and current limiting code
• Francisco on debugging some hardware at Soudan (time outs)
• Francisco bench verification of signal
• Goal is to converge by end next week
• Some longer term items (ADC calibration, client server)
• Running now requires a few days without beam to attempt to run
• Test and them optimize run (currently 4 hours per loop)
• A few days or ~4 runs
• Collect production data (few hours per SM)
• FD polarity put back to normal yesterday
• ND magnet ran for many hours without problem
• Only waiting on ND switch control with Bdot for bdot running
• System fine for normal operations