Difference between revisions of "DV RunGroupC Moller"
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==Simulation Setup== | ==Simulation Setup== | ||
| − | Use GEANT4 via GEMC to estimate the Moller background for electron scattering experiments in JLab's Hall B. | + | Use GEANT4 via GEMC to estimate the Moller background for electron scattering experiments in JLab's Hall B. The first step towards this goal is to use GEANT4 without the GEMC infrastructure to create event (LUND) files that will be used as input events for GEMC. |
[[LH2 target]] | [[LH2 target]] | ||
Revision as of 17:05, 14 April 2016
need to insert moller shielding into card after moller LUND file is created. (see clas12/beamline)
Simulating the Moller scattering background for EG12
GEANT4 Simulation of Moller Events
Simulation Setup
Use GEANT4 via GEMC to estimate the Moller background for electron scattering experiments in JLab's Hall B. The first step towards this goal is to use GEANT4 without the GEMC infrastructure to create event (LUND) files that will be used as input events for GEMC.
LH2 target
Distributions For LH2
LH2 Momentum Distribution in the Lab Frame
LH2 Angular Distribution in the Lab Frame
LH2 Momentum Distribution in the Center of Mass Frame
LH2 Angular Distribution in the Center of Mass Frame
Comparing experimental vs. theoretical for Møller differential cross section 11GeV
Figure 5c: The experimental and theoretical Moller electron differential cross-section for an incident 11 GeV(Lab) electron in the Center of Mass frame of reference.
Change to a NH3 Target
Replacing the LH2 target with an NH3 target
Distributions for NH3
NH3 Momentum Distribution in the Lab Frame
NH3 Angular Distribution in the Lab Frame
NH3 Momentum Distribution in the Center of Mass Frame
NH3 Angular Distribution in the Center of Mass Frame
LH2 Vs. NH3
Comparing Momentum Distribution in the Lab Frame
Comparing Angular Distribution in the Lab Frame
Comparing Momentum Distribution in the Center of Mass Frame
Comparing Angular Distribution in the Center of Mass Frame
Effects Due to Target Material
Target Density
Atomic Mass and Electron Number Effects
Differential Cross-Section Offset
Reconstruction of Moller Events
Creating LUND Files
Preparing LUND for Moller Distribution
Running GEMC
Analyzing Reconstruction Data
Reconstruction of Random Moller Events Within Certain Energy-Theta Range
Modified gcards
Effects of Solenoid on Moller Electrons
Moller Events in Solenoid Fields
Results for Random Spread of Energy and angle theta in the Lab frame
Cover Full Solid Angle of Detector
Calculations of 4-momentum components
Alter Phi Angles
Check Differential Cross-Section
PBS install
Running Expanded LUND files in GEMC
Papers used
[1]Farrukh Azfar's Derivation of Moller Scattering
A polarized target for the CLAS detector
An investigation of the spin structure of the proton in deep inelastic scattering of polarized muons on polarized protons
QED Radiative Corrections to Low-Energy Moller and Bhabha Scattering
http://arxiv.org/abs/1602.07609