Thickness of material to absorb electron beam

In summary, the problem involves directing a beam of electrons with known energy and intensity to a copper absorber. The goal is to find the thickness of the absorber needed to absorb all electrons and determine the absorbed dose. The equation used is D=(1.602*10^-10)* (fluence*E/mass thickness) (Gy). To find the absorber thickness, one needs to multiply the mass stopping power by the density of copper and divide it by the beam energy. The condition for this is thick foil, and the absorbed dose is equal to the absorber thickness multiplied by fluence multiplied by energy and divided by mass thickness.
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amrian
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Homework Statement


Beam of electrons (charged particles!) is directed to copper absorber with known energy (E= 10MeV) and intensity (10^8(s*cm^2)^-1) . I need to find the thickness of absorber so that all electrons would be absorbed. Also under what conditions does it happen and what is absorbed dose then?

Homework Equations



D=(1.602*10^-10)* (fluence*E/mass thickness) (Gy)

The Attempt at a Solution



so to get absorber thickness should I mass stopping power multiply by copper density and then divide it from the beam energy?
is it thick foil condition?
 
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  • #2
if it is, then dose is equal to absorber thickness multiplied by fluence multiplied by energy and divided by mass thickness?
 

Related to Thickness of material to absorb electron beam

1. What is the significance of the thickness of a material in absorbing an electron beam?

The thickness of a material plays a crucial role in determining its ability to absorb an electron beam. This is because as the beam penetrates the material, its energy is gradually absorbed and dissipated, causing it to lose intensity and potentially be completely absorbed by the material.

2. How does the thickness of a material affect the absorption of an electron beam?

The thicker the material, the more distance the beam must travel, and the more energy it will lose along the way. This means that a thicker material will be more effective at absorbing an electron beam compared to a thinner material.

3. Is there an optimal thickness for a material to absorb an electron beam?

There is no one optimal thickness for all materials, as it depends on the properties of the material and the energy of the electron beam. Generally, a thicker material will be more effective, but if the beam has low energy, a thinner material may be sufficient for absorption.

4. What are some factors that can affect the thickness of a material needed to absorb an electron beam?

The energy of the electron beam is the main factor that affects the required thickness of a material. Other factors include the material's density, atomic number, and composition, as well as the angle of incidence of the beam.

5. Can a material be too thick to absorb an electron beam?

Yes, there is a limit to how thick a material can be before it becomes too dense for an electron beam to penetrate. If the material is too thick, the beam may simply pass through without losing enough energy to be absorbed. Additionally, the beam may scatter or reflect off the material rather than being absorbed.

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