Re: [TCML] Running a TC in snow

[Ed Phillips <evp@xxxxxxxxxxx>]

Hi,

One of the reasons for distilled water cleaning is so that when the 
water drys, it leaves nothing behind.
High resistivity water that we use at Fermilab is deionized which is an 
on going process 24/7.  It is the ions
that count in conductivity of water.

Jeff Larson"

   Understand that, just reporting what appears to be common Edison 
practice.  One of my friends was involved with a project to irradiate 
people with 60 MHz radiation in an attempt at tumor control.  In order 
to make the antennas reasonable size they were immersed in water, as was 
the patient [in a rubber bag - guess they just floated in the top of the 
tank].  Purpose was to cut the wavelength due to the high dielectric 
constant of the water.  The electrical part of the project went OK 
[never heard about whether the therapy worked] but in spite of extreme 
care and cleanliness of the tank and associated equipment the water had 
to be changed every few hours because the conductivity increased enough 
to cause excessive attenuation.  I'm sure the same problem faces guys 
using water as a dielectric in HV capacitors for energy storage.  
Doesn't take many ions to run the conductivity up

Ed

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