Kerr - July 29, 2016

Magnetic Measurement Facility readings of pucks, Steel () and Molybdenum --> media:LDGT01 Puck Measurements for MOKE 16-7-28.xlsx

This graph reads 6.33 Gauss/1 Amp. Note this is only the magnetic field at the surface of the Steel () puck.

Important INFO to note

• foil surface diameter across is 11 mm +-.5 mm
• Laser dot diameter through polarizer to foil surface is 2mm +-.5 mm

Excel Sheets for MMF data taken

---First, Data taken with original setup. Stage untouched since the 28th. Before stage was realigned in an attempt to be parallel with foil

• two measurements were taken
• Center was approximately 10.75 mm (on micrometer)
• at 9.3 mm (on micrometer) a tad left of center
  • media:preadj9.3mm.xlsx
• at 7.0 mm (on micrometer)
  • media:preadj7.0mm.xlsx

--- adjustments made on linear stage in an attempt to gain parallel relation to foil, We moved legs of table to be parallel with solenoid.

Note: Center at 12.8 mm

• far right 17.3 mm (on micrometer)
  • media:farright17.3mm.xlsx
  • This is not pretty^
• right center at 15.4 mm (on Micrometer)
  • media:rightcenter15.4mm.xlsx
  • Also not pretty^
• at 12.8 mm (on Micrometer) w/ lens... Note: I did not finish this measurement or foolishly did not save it...
  • media:12.8mmwlens.xlsx
• at 12.8 mm (on Micrometer) w/out lens... this was a test to see if the lens was the reason for the "dip"... As soon as we saw a dip we agreed the lens was not affecting signal therefore we didn't finish the measurement
  • media:12.8mmwoutlens.xlsx

• With mirror in place of foil at center 12.8 mm
  • media:12.8mmmirrorbackground.xlsx
• 25 amp increments (as opposed to 50 amp inc.) at 12.8 mm (on micrometer)
  • media:12.8mm25inccenter.xlsx
• Stability check at 12.8 mm (on Micrometer) with constant I of 200 amps over span of 16 min
  • media:stability200amps.xlsx