- !!- Back up ofadaq cluster/>All backupfilesare on ifarm work disk.
+ Welcometo the Hall AE02-013GEnexperimentwikipage!
- *~adaq/e02013 (without links to external file systems androot files)/> /w/work3503/e02013/GEn/adaq.bk/adaq * ~a-onl/crl (triggerconfiguration)r />* ~a-onl/scaler (scaler data dumped) * ~a-onl/scripts(scripts to putepicsvariables into data stream) /w/work3503/e02013/GEn/adaq.bk/a-onl/>* ~adev/slowc (containsHV maps)/> /w/work3503/e02013/GEn/adaq.bk/adev !!+ Documentation !!! ((GEnDocChannelMap|GEn hardware connection scheme))/>!!!((GEnDocEpics|Epics variables))/>!!! ((GEnDocTrigger|Trigger schemes))r />!!!+ GEn Raw Data Structure (by Robert Michaels) !!!!- Overview The raw data structurerecorded in the GEn DAQ datastreamwill be described. Thisincludes the followingdata: # Event datarecorded witheachaccepted trigger (fastbus and VME data from the two spectrometers and from the BPMand raster) # scalers # EPICS information/># "specialevents" which are inserted onceor infrequently during a run, such as prescale information and detector map.
+ ExperimentE02-013 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 bydetecting the electron and neutron.
- Thesedata are decodedby the Podd Analyzer classes developed forGEn, see also GEn Analyzerdocumentation.I won't go into that here,but suffice it to say you need an up-to-date database with correct crate mapand detector maps.
+ This site ishighly unorganized,butwe are trying to fix that. Please just deal with the clutterfor now.
- Iwill not describe the various other datastreams in Hall A, such as Moller polarimeter, e-P energymeasurement, Compton Polarimeter, etc.
+ !! Base Equipment * The ((NeutronDetector|Neutron Detectorknown as BigHand))r />* The ((BigBite))Spectrometer * The ((Target)) of polarized Helium-3 and the reference cells
!! Analysis Categories and Issues * ((BigBite Tracking and Drift Chamber GlobalVariables))/>* ((Neutron Detector Analysis)) * ((Monte Carlo|Monte Carlo Reports and Package Documentation))/>* ((D.ctimeL1A|What is that D.ctimeL1A variable?)) * ((Livetime|How to calculate the differentlivetimes)) * ((Scalers for GEn)) (in progress) * ((AsymmetryCorrections|Corrections toapply 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 Onlinereplayof the data))
!! Looking for a run? Brandon's log of the runs takenin the differentkinematic 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)]r />* ((GEnDocChannelMap|GEn hardware connectionscheme)) * ((GEnSpecialEvents|Specially inserted events explained)): prescale factors, threshods, epics variables, high Voltages, ((GEnDocEpics|Epicsvariables)) * ((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)]
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