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)]