-- Ice Cream Truck Music --
Okay! So, We are here at Jefferson Lab
and it's about 100 degrees outside
and we though
"Why not make a little bit of ice cream?"
Now, of course we don't have a lot of ice cream on hand,
but we do have half-and-half, sugar and vanilla
and, since we are at Jefferson Lab
where we have a superconductive accelerator,
we have lots of liquid nitrogen.
So, we're going to make ourselves some liquid nitrogen ice cream.
So, Joanna and Stephanie are going to help me out with this,
so dump in the half-and-half, dump in the sugar, dump in the vanilla.
How much?
All of that.
Uh, it's a cup of sugar,
and, it's a quart of half-and-half and...
what... two tablespoons, I think, of vanilla.
But the recipe is on our web site at education.jlab.org, um... somewhere.
In case you have some liquid nitrogen.
Yes, in case you have plenty of liquid nitrogen flying around.
This is true.
And can you stir that up a little bit?
So, of course, what we have is basically melted vanilla ice cream.
So, to cool it down, we'll be adding a little bit of liquid nitrogen,
which is at 321 degrees below zero Fahrenheit.
For those of you who prefer Kelvin,
it's 77 Kelvin or minus 196 on the Celsius scale.
So we'll pour out a tiny bit into our container here.
And, of course, you need to spill some around.
Just because you can.
And... 
Let the scooping begin!
Stephanie scoops, Joanna stirs.
More?
Just a couple drops.
And that's okay, we have plenty more nitrogen.
Of course, the danger is you could make it too cold to actually scoop out.
Which I think I just did.
And so there you go!
With the right ingredients and a couple of minutes,
you can have yourself a nice, cold treat!
-- Ice Cream Truck Music --
