RE: Side-wise Vectors?????

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi,

         I tried putting the magnet 90 degrees to the arc.  The arc was 
very heavily pushed "away" from the magnet in "both" the north and south 
orientations:

http://hot-streamer-dot-com/temp/PB190014a.JPG

So the magnet does "push" the arcs!!  But it does not seem to have much 
effect on the cork screws...

Cheers,

         Terry


At 04:13 PM 11/18/2004, Terry Fritz wrote:
>Hi,
>
>I tried a little test today.
>
>I went to the local magnet deli and got a large 2.5 inch dia 1/2 inch 
>thick round magnet with a 3/4 inch center hole:
>
>http://www.wondermagnets-dot-com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0034
>
>It is the NdFeB type and rated at 1.21T
>
>http://hot-streamer-dot-com/temp/PB180013.JPG
>
>This magnet sets happily on my tube coil:
>
>http://hot-streamer-dot-com/temp/PB180010.JPG
>
>So how does it affect the corkscrewing?
>
>Without:
>http://hot-streamer-dot-com/temp/PB180007.JPG
>
>With:
>http://hot-streamer-dot-com/temp/PB180003.JPG
>
>It is hard to tell from the pictures, but as far as I can see first hand, 
>it makes no difference at all...  Flipping the magnet to the other side 
>did not affect anything.
>
>Maybe this will mean something to somebody...
>
>Cheers,
>
>         Terry
>
>
>At 04:40 AM 11/18/2004, Steve Conner wrote:
>> >So, maybe, it's the coil's discharge orientation to the earth's magnetic
>> >field that determines the direction of the cork-screwing-like path?
>>
>>No, I think it's more likely the magnetic field of the secondary (and/or
>>primary) coil. This is orders of magnitude greater than the earth's field, I
>>(and others) have seen it deflect the beam on an oscilloscope near the coil
>>through about 1/4". This was a good quality scope with an aluminium case and
>>mu-metal shield on the tube.
>>
>>This is an interesting conundrum though. In a SSTC, the primary and
>>secondary currents are theoretically in phase with each other, and are zero
>>at the instant when the topload voltage is maximum. As far as we know, the
>>discharge only grows for a short time around the topload voltage maximum, so
>>it should see practically no field.
>>
>>So maybe streamer growth occurs at different times than we thought, or maybe
>>the magnetic field driving the corkscrew effect comes from the primary.
>>Under heavy loading, the primary current in an untuned primary SSTC starts
>>to lag the secondary current, and so the primary field could be non-zero
>>during the streamer growth time.
>>
>>If my hypothesis was right, then in a tuned primary coil such as a VTTC or
>>CW-DRSSTC, you should be able to make the corkscrew go in either direction,
>>or disappear altogether, by adjusting the primary tuning (which can make the
>>primary current lead or lag the secondary)
>>
>>And, a SSTC magnifier should not corkscrew no matter how hard you try, since
>>the primary coil is physically far away from the discharge.
>>
>>Another support for the hypothesis that the field comes from the primary, is
>>the observation that sparks from a SGTC or OLTC do not corkscrew. The
>>primary current in these classic disruptive coils has more or less died away
>>by the time the streamers start to grow.
>>
>>Has anyone tried any of these experiments?
>>
>>Steve C.