User:Brian P. Josey/Notebook/2010/04/26

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Goals for April 26

 * Definitively prove the worth of yoke:
 * Smooth out gap simulations
 * Model small magnets alone in contrast, 1/4 inch and 1 inch gaps
 * Create gaps in iron nail electromagnet
 * Talk to Koch about alternatives to Hall (?) sensor and power source
 * Individual and aggregated ferritin force:
 * reliable way to estimate concentration/number of ferritin in a spot
 * get units to work (inches/gradient into SI)
 * distance between magnet and protein
 * effect of glass?
 * GENERAL DIRECTION: move yoke onto microscope stage
 * EXTRA:
 * read up on physics of dipole-dipole interactions in solution
 * find and run the second of Koch's magnetic models

Yoke
I am in the process of proving the worth of the yoke, and I've already noticed two things:


 * 1) Without the yoke, the field appears to be a exponential decay
 * 2) With more magnets the field strength increases

While the second point makes sense, the first one gives some credence to having the yoke, even with the permanent magnets.

I am going to analyze this data at home and post it after I finish a take home exam:

Note to self key:
 * cone and flat: cone and small cylinders
 * flat and long: leftside of complex yoke w/o bends w/ small magnets
 * iron control: control form Koch's
 * control small gap: small gap control
 * iron gap: break in right side on iron
 * two electromagnets: iron yoke's left side only
 * big control: control for 1/2" gap
 * neomag big gap: 1/2" gap on left side of complex yoke


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