Description of the degaussing apparatus from Michal Bajcsy (Harvard University)

Our apparatus is made following this directions.

The degaussing machine I made consisted of:

1) two variacs (I used these ~$50 Variacs from CIRCUIT SPECIALISTS INC, 220 S COUNTRY CLUB DR BLDG 2 MESA, AZ 85210-124).

2)battery jumper cable (mcmaster)

3) clamp-on current meter (newark, 52F7504) (ours is from ?McMaster)

4) some kind of enclosure, but I have not really completed this part

I used the first one as it was but ripped apart the second one as I needed only the the magnetic core and the primary winding. I made a secondary winding on the core out of one or two turns of the jumper cable. Overall the first variac was plugged into the wall, the primary winding of the magnetic core from the second variac was plugged into the output of the first variac (the secondary winding of which was made out of the jumper cable). Then I ran a copper tube through the cell shielding and connected the clamps of the jumper cable to each end of the tube. The voltage dial on the first variac allowed me to change the current through the rod between 0 and ~300A (as measured with the clamp-on current meter).