Mlr Summ TF

VanWasshenova_Thesis#Mlr_Summ_TF

Moller Summary

Scattering Xsect

Figure 2b: GEANT4 Simulation for the Moller electron scattering angle theta distribution for 6E6 incident 11 GeV electrons in the Lab frame of reference. The LH2 target reduces the mean free path of the Moller electron to around 60 degrees in the lab frame. This property of limiting the Moller angle is independent of the target length.

https://wiki.iac.isu.edu/index.php/Converting_to_barns

[math]\frac{d\sigma}{d\Omega}=\frac{ e^4 }{8E^2}\left \{\frac{1+cos^4\frac{\theta}{2}}{sin^4\frac{\theta}{2}}+\frac{1+sin^4\frac{\theta}{2}}{cos^4\frac{\theta}{2}}+\frac{2}{sin^2\frac{\theta}{2}cos^2\frac{\theta}{2}} \right \}[/math]

Moller E -vs- Theta in lab

Figure 4a: A plot of the number of Moller scattering angle theta in the center of mass frame versus the theoretical differential cross section. The width of the bins is 0.001 degrees for the angles in the center of mass frame corresponding to angles of 5 to 40 degrees in the lab frame. A weight has been assigned for each value in theta which will give the theoretical differential cross section when applied.

Figure 4b: A plot of the number of Moller scattering angle theta in the lab frame versus the theoretical differential cross section. The width of the bins is 0.5 degrees for the angles in the lab frame. A weight has been assigned for each value in theta which will give the theoretical differential cross section when applied.

Moller events using an lH2 target geometry No Raster

DC

Beamline

Magnet Components

FTOn

FTOff

clas12

DC hits -vs- Solenoid

With the Torus at zero Magnetic field the solenoid is changes to show how moller electrons move off the faces of R1 DC.

With Magnet Components

Without Magnet Components

With Only S1R1 DC

What happens when Endplate material is vacuum?

Moller Electron Events(1st hits)

Photons Hits in R1

Tomography

Moller rate -vs- length of a single taerget

0.5 cm radius -vs- Z

Target is a one 0.5 cm radius cylinder of length Z.

By how much does the moller rate change at full field ?

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VanWasshenova_Thesis#Mlr_Summ_TF