10 January 2020

Neutron Therapy

A place where you can find some neutrons if you lost yours somewhere.
 
If you knock on each door, one of them will open. Thus, a group of curious people finds themselves inside a small workshop. From here, the conveyor line begins.
The carts travel four 90-degree turns in a tunnel lined with blocks of barite concrete. That means that the labyrinth leads to an interesting place.
The labyrinth comes to a dark hall. The dosimeter shows normal.
The lights come on. A large high-voltage installation appears before the eyes of the guests.
An additional protective screen.
Look at this cube made of polyethylene blocks.
Inside the cube, there is a molybdenum target, which when irradiated with electrons emits braking radiation, which hits the second target from the element with excess neutrons (or if the radiation energy is higher than the binding energy of neutrons of the nucleus, as in the case of beryllium), and causes it to emit neutrons. The neutrons pass through the moderator. Depending on the thickness of the moderator, neutrons with different energies can be produced.
The electron beam exit channel towards the heavy target.
Polyethylene is used as the moderating material because of its ability to absorb neutrons.
On the left side of the installation, you can see a filter (probably made of beryllium), which additionally cuts off unnecessary radiation.
Let's look at this linear accelerator.
It has several applications other than inducing neutrons. For this purpose, additional units are attached to the beam exit channel. When experiments are conducted on them, the beam is directed onto them by electromagnetic lenses.
A computer for data registration and adjusting the experiment parameters.
Boxes with lead bricks and polyethylene blocks are stored near the first wall of the conveyor labyrinth.
Near the racks stands an industrial betatron for sterilizing products or objects.
Let's look at the whole complex from above. It looks like an octopus spanning a barrel of electrons.
Until we meet again!

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