Re: TC for VDG injection

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

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>


> <davep-at-quik-dot-com>
 
>>        Takes some care.  van de Graaf currents go up with
>>        such a rig....

> They don't.

	They do.  This is why 'working' (accelerator, etc,
	van de Graaffs use them.  There is however a
	clarification:

> The maximum current is limited by the maximum charge
> density that the belt can sustain without producing ionization
> (26 uC/m^2).

	concur.

> A friction system in dry ambient quickly reaches this
> limit too.
	'quickly' is a matter of debate.  While the max current

	is belt limited (as noted), the _average_ current
	is higher, approaching this limit more rapidly,
	with a charge injector.

	The added current is more notable in 'pretty lights'
	operation (sparks) that 'working' (Current to
	load, eg accelerator tube) applications.

	Also an injector makes things more 'predictable',
	as its less subject to humidity anomalies.

	best
	dwp

...the net of a million lies...
	Vernor Vinge
There are Many Web Sites which Say Many Things.
	-me