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README.md

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+# XIAEventBuilder
+event builder for XIA PIXIE16 digitizer, from evt to root
+
+## prerequiest
+ROOT 6.00+
+
+Codes need to be compiled are in armory/
+
+# armory/DataBlock.h
+this is the source file for the class DataBlock, it stored all information from a single data block from pixie16 output. 
+
+# armory/evtReader.h
+this is the source file for the class evtReader.
+It read the *.evt file (which is same as pixie16 output) and convert each measurement (or data block) from byte into meaningful data and use DataBlock class to store the information.
+It can also scan the evt file.
+
+# armory/MergeEVT
+this merges all evt files into *_raw.root. 
+
+# armory/EventBuilder
+this builds events from *_raw,root to *.root file
+
+# armory/evt2hist
+this processes evt file to hstograms. 
+
+# armory/to2root
+this build events from *.evt.to files to *.root file (need to check the compactability with EventBuilder)
+
+# armory/pxi-fsu-time-order
+this sorting the time from *evt file to *.evt.to.fsu.XXX, where XXX is the time window.
+It will search data within XXX time window, if non of the data is from clover, discard.
+
+# armory/xia2root
+this is old evt to root for custom pixie DAQ. 
+
+# Analyzer.C/h
+this is a TSelector for analysis the *.root file
+
+# PreAnalyzer.C/h
+this is a TSelector for consolidate the *.root and save to new *.root file.
+It only save added-back gamma and GAGG data.
+
+# PIDAnalyzer.C/h
+this is a TSelector for analysing particle-gamma
+
+# GAGGPIDCutCreator.C
+this is a PID Cuts Creator