GEn

Welcome to the Hall A E02-013 GEn experiment wiki page!

Experiment E02-013 is measuring the electric form-factor of the neutron (GEn) with a double-polarization technique. Polarized electrons are quasi-elastically scattered off the neutron in polarized Helium-3 nuclei, and the final state is exclusively selected by detecting the electron and neutron.

This site is highly unorganized, but we are trying to fix that. Please just deal with the clutter for now.

Meetings and minutes

Base Equipment

• The Neutron Detector known as BigHand
• The BigBiteSpectrometer
• The Target of polarized Helium-3 and the reference cells

Analysis Categories and Issues

• BigBite Tracking and Drift Chamber Global Variables
• Neutron Detector Analysis
• Monte Carlo Reports and Package Documentation
• What is that D.ctimeL1A variable?
• How to calculate the different livetimes
• Scalers for GEn (in progress)
• Corrections to apply to the raw asymmetry
• Proposed GEn SQL database

Theory

• Bi-weekly Meeting Theory Topics

Replays of the data:

• Kin4's replay with a list of targets and run numbers
• Original Pass0 Online replay of the data

Looking for a run?

Brandon's log of the runs taken in the different kinematic settings and conditions is available here: gen_runlog_brandon.txt (31.33 Kb)

Running Conditions and DAQ formats

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GEn Target NMR measurments

Simple tools/scripts (NOT for calibration)

• GNUPLOT nucleon Form-factor, cross-section and asymmetry formulas: nucleonFF.gnuplot (2.83 Kb)