Author Topic: Coils mass amps restriction and applying e fields  (Read 3898 times)

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magnetron xray source
« Reply #104 on: October 04, 2019, 16:29:11 pm »
hello

do you think that a microwave could be used to generate xrays?

i may have a old tube here..

i was thinking maybe if we apply low current on the filament and 40kv on the tube something is going to happen.. . who can tell me ?



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Re: Coils mass amps restriction and applying e fields
« Reply #105 on: October 04, 2019, 17:39:39 pm »
Magnetron tubes are made of copper and that is a suitable target material for X-ray production.  With the filament grounded, you would need a positive potential of 70kV to 100kV on the shell.  I don't know how effective it would be without a window.

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Re: Coils mass amps restriction and applying e fields
« Reply #106 on: October 06, 2019, 19:33:54 pm »
nice news... magnetrons are easy to find... i was even thinking that would be possible to make a xray tube taking parts of a magnetron and manipulating hot glass with a hydrogen flame but it seems that it takes lot of vaccum for it to work...

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8 shape solenoid or linear toroid..
« Reply #107 on: October 07, 2019, 15:45:46 pm »
i just thought of something

did any one ever thought of making a sort of linear toroid by using a 8 shape solenoid with two cores?

i mean is almost like having two solenoids close to each other of course but who knows.. the capacitances will be totaly different

i think is easier to wind than a toroid.. and may have the same or close to effect the proximity of the cores creates a gap that is very wide...

just food for thoughts




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Let the tests begin
« Reply #108 on: October 08, 2019, 01:34:05 am »
Thanks to your kind help Steve now i have that audio amplifier to put it to work

im going to show what im planning to do and if you have any ideas please tell me =D

im planning to do the following:

considering im going to do this first test with a single cell im going to have low capacitance but very low resistance too given the design of my cell where the screws goes thru the electrodes..

why does it mather? well i think that lc resonance will be able to have a detectable Q factor if the resistance is smaller  than the reactance of the capacitance.. thats not a difficult thing in a small capacitor

im not sure if what im going to see is actually a LC resonance or if that is what im looking for...

perhaps the only way to go is to use external capacitors once we know the water frequency who knows...

my plan is to apply around 20v from this amplifier into a step down transformer giving a very low voltage output im thinking about use a toroidal core i have somewhere here

i plan to have only 100 mv output so   200:1  stepdown very few turns.,..

i series with the transformer i will add a resistor to restrict the load to a certain impedance.. this amplifier seems to work good from 4 to 50 ohms.. .

i will be trying to find any response in the audio range.. i will monitor the current and the voltage i expect to see something strange around 5khz haha

but the main idea is that voltage should rise or current should drop at a certain frequency...

to measure the current i have 5mohm resistor to use in series...

if we consinder the cell to have another 100mohm of resistance and the copper wire included we should have max one amp flow at resonant frequency... because in series the current of the resonance circuit depends on the series resistance... the voltage will be the product of the current and the reactance of the component..

if the capacitor is hit at a a frequency that gives it a reactance of 3000ohms it will have 3kv across it for that 1 amp flowing...  but that Q is very sharp... 

im not sure if the capacitance of the cell is something we can measure... i think is more probable that this frequency change with the contaminants type and amount and so we should expect that empiricaly is easier to make a graph to identify where that range is... otherwise is like trying to find the signal of a satelite without even knowing where it point to

meyer stated that its in the audio range pretty clearly and it can be from 20 to 20khz  thats the only indication of range we have for his tap water

so im looking for a gain in voltage or current or peak of current or even a drop in current

in the case the current drops it would indicate that the cell works as a kind of resonant tank by itself (working as a  parallel resonant circuit voltage will be equal to applied voltage but current input drops as the tank voltage rise)

if the current rise and is what i think is what is going to happen, because meyer called it an LC series directly, voltage will do so too probably and will be detectable so i start from this figure...

 




« Last Edit: October 08, 2019, 02:48:37 am by sebosfato »

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The amplifier
« Reply #109 on: October 09, 2019, 00:56:59 am »
the board has two physical inputs, i downloaded a tone generator for windows and im going to use a bluetooth adapter to get the sine waves into the amplifier...

im thinking about connecting in series with the cell a speaker just to see how it behaves initially...

the outputs and inputs of the amplifier share the same ground...

in this tone generator i can have a dc ofsett

for the step down im planning to use a toroid but i dint found it yet 200 turns primary and 1 to 10 turns secondary

im going to feed the amplifier with my old variacxstepdown configuration and will apply from 12 to max 20 or 25 v i just need to find a center tap on the stepdown but will be easy with the oscilloscope...

as it is a 500 w variac connected to another variac in step down configuration i believe the power will be somewhat limited as im limiting the voltage going into the step down transformer i believe it will limit around 200 watts or even less at 50v applied on the first variac making it a lot safe hopefully

the bluetooth makes things easy as no cables are required on the input so i will only connect the oscilloscope on the input and at the load...

 

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Amplifier seems amazing
« Reply #110 on: October 09, 2019, 03:41:21 am »
I used up to 80v mark on the input variac and it seems to arrive 30vrms ----(the variac is connected to a 2:1 stepdow made with the same variac primary but secondary thicker wire input goes from 0-250v and steps to 0-120) -----between the inputs and it works... seems it didnt needed the center tap... was more a ground thing..

the higher the voltage applied the better is the range in the pot that come in the amplifier.. the sine become square if the voltage applied is lower than the applied power on that button

i used 10 ohm dummy loads

still need to figure what voltages to apply to it for work properly full range of the button.. without saturating..

the bluetooth makes a signal that make 2v peak to peak but only 600mv rms

the resistors got very hot quick and the amp didnt seem to warm a little..

highly recommend this in combination with a frequency generator seems to be a better way to control the power and simpler

now is time to get a transformer hooked to it...

i also want to instal a fan to prevent it from heating on the next tests

the only problem is that the bluetooth only work on battery and kind of it sends a strange tone repeatedly when is finishing the battery and the battery is shitty .. perhaps i could open it and change it for a better battery even if it become a frankenstein


i may connect the computer headphone output directly

the outputs LR are in phase for the signal getting from the signal generator

i used the one in attachment

somehow the sine seems to be a resampled version or may be the bluetooth signal that makes it like this .. 300khz appeared once





« Last Edit: October 09, 2019, 09:23:37 am by sebosfato »

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Lab view the return
« Reply #111 on: October 09, 2019, 16:48:58 pm »
when my computer broken i lost labview instalation and it was required to use with my cdaq 9172 with some few modules... its a pro test equipment...  i have four modules one for current measurement 9221, one for counter 9422 and two for multiple inputs 9211 if you want to look over...

i found however that you can use the labview with arduino or esp8266 if you want to and it will unlock power in your lab!

here is how to install it

here how to associate arduino or esp8266 to it


im trying to recover a battery from a old notebook to add to the bluetooth adaptor... hopefuly it wont burn...
« Last Edit: October 09, 2019, 17:12:51 pm by sebosfato »