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curiosity stream the source of some of
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sellout right at the beginning what we
like science and knowledge documentaries
don't we yeah at least put a proper
shared on people will figure out crazy
fine you realize we are the same person
don't you I like to show you how to make
a particle detector so in case of a
nuclear disaster you can see with your
own eyes the amount of radiation you are
receiving before your body melts just
joking this device is a fun project to
help you observe the radiations and
particles we are bombarded with every
day from the universe in case of a
nuclear disaster your body melting would
be a good enough indicator this device
is called a cloud chamber originally
designed by Charles mance Williams
Wilson basically it's a glass container
with a super cold surface on the bottom
that contains alcohol vapor the vapor
creates a thin layer of cloud over the
cold surface which is our detector let's
make it then I'll explain later I've
never made it before but I know how it
works okay so hopefully it won't fail
badly I've seen other youtubers use dry
ice to create the super cold they need
but for my cold surface I'll be using my
Peltier device cold surface I made in my
previous video what did you think I make
it for a fridge no I like particles and
radiations and hello FBI agent what this
is for educational purposes only is it
now just watch to the end of the video
before swatting my house oh yeah oh wait
oh by the way do you SWAT Canadian
residents - we do yeah the problem I
have with this is that with my
inefficient fan cooling system I can
only cool the surface down to 5 to 3
degrees Celsius while according to
Wikipedia I need cooler than minus 26
degrees C when we apply a DC voltage
across a Peltier device which is this
white piece attached to the heatsink it
creates a temperature difference between
its two surfaces up to like 60 degrees
Celsius now if we cool down the hot
surface with the same temperature
difference between the two surfaces the
whole surface can be freezing but with
my fan I can only cool the hot surface
to around fifty to sixty degrees Celsius
and so the cold surface comes close to
zero but I have a plan I'll create a
container filled with water and put the
heat sink in it and freeze the water
with the ice water at zero degrees my
surface could go down to minus 50
degrees
hopefully I create the container using
this wooden panel which should also help
with thermal insulation I don't want to
make a sawdust mess in my room again I
wonder if I can cut it with my knife are
you getting nervous for me cutting
towards my finger you should
you must never cut toward your body
parts slap like on this video if you
agree approved let's see if connected
with a knife helped at all nope I have
to use a saw
now we just hot glue these pieces
together
then I'll fully cover inside of this box
with silicon to make sure the wood
doesn't warp or damage with water
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now I will make a clear container using
Plexiglas epic beautiful now I will glue
them together using some two-part epoxy
I did bad glue job the surface is dirty
with glue never remove the protective
layer until that glue is dry maybe I can
clean it a bit better after the glue
dries for now let's silicon I add more
silicone around the whole thing to
insulate it better from the outside
world and also put some silicone on the
edge of the surface
and then I add some soul to the edge of
the glass so it doesn't stick to the
silicon and then I push the glass on top
of the silicon and let it dry the
silicon should provide a good seal to
prevent the air from escaping now we
peel this off not bad but I don't know
if this seal was necessary now I'll fill
this container with water and put the
whole thing in freezer to freeze while
I'm working on the glass now we cut some
sponge in half and we want to glue these
inside our container right here these
sponges will be soaked in alcohol and
act like alcohol container but before we
glue our sponges in there we cut them
open at the center and sprinkle some
resistors in the groove see I put three
one point two kilo ohm resistors in
series and I'll place them in this cart
I made in the phone and I'll run the
system between 24 and 30 volts and these
resistors will create some heat that
vaporizes the alcohol smash like now I
solder the two forms in parallel and now
we hot glue our foams in the glass I ran
out of proper sized glue sticks for my
hot glue gun now we need some lights but
the problem is that this string runs on
12 volt the good thing about these
string lights is that you can cut them
along these lines and they continue
being functional like an earthworm so we
cut to pieces the length we need every
piece is still functional at 12 volts
now we just solder them in series and
they'll work at 24 volt and now we do
our lights to the side of the glass
right at the bottom like this now when
we turn on the light it will illuminate
the mist created on the cold surface oh
man what happened here why is it peeled
off deep water get under there and iced
up or did the whole thing contract look
at this it pushed my module up it's all
ice damn it
look at all the ice under these modules
I tried to fix it let's put it back in
the fridge as is and see if it works
otherwise I'll have to do dry ice okay
now that we are waiting for the big one
to freeze I froze my single module in
water and let's see if it can actually
go that low of a temperature I will run
it at 10 volts which I want to do for
the big module and the temperature
reading here is in degrees Celsius which
is zero right now let's power it up look
at it go
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well it's cooler than minus 26 that we
need and it's probably colder my
thermocouple is not making a good
contact let's go to maximum 12 volt well
that didn't make much of a difference
well the result is not super promising
it's kind of marginal especially with my
bigger broken plate as soon as the water
melts and heats up the temperature rises
too so I have only a few minutes
especially when the ice melts around the
heatsink it makes a good insulator to
the eyes and it's temperature rises and
you see that the temperature doesn't
fall as low as we expect it to not nice
well whatever let's try it I'll soak the
phones in alcohol power it up and now we
wait I created the mist it's detecting
nothing though not a single particle is
passing through my detector or maybe
it's because it's not cold enough
or maybe I'm blind oh I saw something up
there it is
I saw it oh yeah there I saw it
hey FBI man do you see it yeah it's
beautiful
we'll kill what though I can see them
they are so dim but I can see them I bet
it would work better if it was cooler
and look at that it's beautiful
wow that was big see there are three
particles alpha beta and gamma and the
biggest ones look at that look at that
which are two protons and two neutrons
that's the heaviest part these particles
come from nuclear reactions and
radiations from material around us and
from space Sun and cosmos and they are
organizing so they could cause cancer
shouldn't be smiling for that well their
natural amount is so small they wouldn't
cause a problem unless you're exposed to
much more levels of radiation that would
break your DNA and cause cancer when
those particles pass through the alcohol
vapor they excite the vapor molecules
the molecules stick together and
condense into a much thicker cloud that
we can see okay let's try again this
time I refroze the water with some salt
in it so hopefully it can stakeholder
longer and now we wait I can see the
mist clearly seems it takes so long to
start detecting something there that was
it I want to try something I've heard
bananas are radioactive so maybe they
provide more all four particles I don't
see much of a difference
good so we can conclude that bananas are
safe to eat
we know that smoke detectors contain
dangerous radioactive material let's see
if they affect our reading at all
this sensor might be quite shielded
though let's see well too bad they might
have shielded it pretty well so I can't
see anything there either but if we were
to take the radioactive stuff out of it
you would clearly see the lines jumping
out of it well it definitely works
although my cooling surfaces doesn't get
super cooled and it's broken but it's
another success story in my books with
the proper cooling system and something
to cycle alcohol this would work
phenomenally I guess exactly like the
commercial ones they sell out there well
I was curious if I could build it and I
did
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