History: 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.

!! ((AnalysisMeetings|Meetings and minutes))

!! Base Equipment
* The ((NeutronDetector|Neutron Detector known as BigHand))
* The ((BigBite))Spectrometer
* 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|Monte Carlo Reports and Package Documentation))
* ((D.ctimeL1A|What is that D.ctimeL1A variable?))
* ((Livetime|How to calculate the different livetimes))
* ((Scalers for GEn)) (in progress)
* ((AsymmetryCorrections|Corrections to apply to the raw asymmetry))
* Proposed ((GEnDB|GEn SQL database))

!! Theory
* ((Theory Topics|Bi-weekly Meeting Theory Topics))

!! Replays of the data:
* ((Kin4:Pass1|Kin4's replay with a list of targets and run numbers))
* ((Pass0|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: [http:tiki-download_file.php?fileId=14|gen_runlog_brandon.txt (31.33 Kb)]

!!+ Running Conditions and DAQ formats
* ((AdaqBackup|Back up of adaq cluster))
* [http://hallaweb.jlab.org/experiment/E02-013/wiki/tiki-page.php?pageName=GEnRawDataStructure|GEn Raw Data Structure (by Robert Michaels)]
* ((GEnDocChannelMap|GEn hardware connection scheme))
* ((GEnSpecialEvents|Specially inserted events explained)): prescale factors, threshods, epics variables, high Voltages, ((GEnDocEpics|Epics variables))
* ((GEnDocDiag|GEn trigger and connection diagrams/schemes))

* [http:../RunPlan06/runplan.ps|Experiment run plan]

!! ((GEnNMRData|GEn Target NMR measurments))


!! Simple tools/scripts (NOT for calibration)
* GNUPLOT nucleon Form-factor, cross-section and asymmetry formulas: [http:tiki-download_file.php?fileId=19|nucleonFF.gnuplot (2.83 Kb)]