Basic Information for New Comers to Trigger System    
================================================== 

Last update:   Su Dong   Feb/10/2005   

!!! Welcome to the trigger group !!!

The main sources of information are all available from the 
trigger system main web page: 
http://www.slac.stanford.edu/BFROOT/www/Detector/Trigger/

A) The basic introduction to the system: 
   Most of the relevant information are under the "Documentations"
   section of the trigger web page. Breaking things up into
   different levels of details: 
   a) top level:   BaBar NIM paper trigger section  
                   (on the trigger main page "doc" section) 
                   This is the best summary of the whole system
                   before the DCZ upgrade. 
   b) intermediate level:
      From other links in the trigger main web page "doc" section:
      1) IEEE papers on DCT design and EMT design/performance.
      2) For documentations on the Drift Chamber Trigger upgrade:
         From trigger main page, follow the top tab for 
         [Level-1 upgrade], then "Trigger upgrade Final Design Review
         page" to examine some of the top level documents for 
         an overview.   
   c) detailed: level:
      1) Remaining links in the trigger main web page "doc" section:
         1.1) "Kirsten report" for DCT+GLT implentation 
              (old system but TSF/BLT/GLT still largely apply).  
         1.2) Stephen Gerig's thesis on original trigger design studies
      2) For the DCT upgrade, check the FDR page as in b).3). 
      3) Under the "LINKS" section 
         -> L1 subsystem links for EMT, GLT, IFT and upgrade DCT
         -> L3 trigger  
         -> Other Trigger Doc & Link: a full set of preliminary/final 
            design review web pages for the old pre-DCT upgrade system.

B) Sign up to E-mail lists and hypernews:
   a) The trigger BFMAIL list
      This is the largest lists including all people interested in
      trigger system so that the most general announcements typically
      go on here. To subscribe to this list, please check under            
      the "communications" section of the trigger page there is an 
      item for "BFMAIL: substription/usgae instructions".
   b) The trigger Hypernews:
      The main trigger related hypernews links are listed under the 
      "communications" section:
      Trigger operations:  
        Current system operations 
      Trigger software/software-trigger: 
        Trigger software / Level-3 discussions / BGfilter discussions 
        / trigger analysis software etc.
      L1 Simulation Upgrade: 
        L1 simulation upgrade and associated trigger software 
        technical discussions.        
   c) Hyprenews usage tip: 
      In case of need to post plots to hypernews, please avoid using 
      you owner web page pointers (www.slac.stanford.edu/~username/*)
      as these tend to get broken easily from your cleaned up later or 
      if you leave BaBar. You can either use the weekly trigger meeting
      directories, or your hypernews auxilliary directory (typically of
      the form e.g. $BFROOT/doc/HyperNews/hndocs/aux/auxvol03/username) 
      to ensure the archive will not be broken.      

C) Safety related procedures:
   The requirements:
   1) Everyone needs to complete the office JHAM 
      (signed by BaBar/SLAC PIs)
   2) For taking shift and performing any systems tasks at IR2
      needs to complete the IR shifter JHAM  (signed by Run coordinator)
   3) Any work related to L1 hardware at IR2 or Lab needs to
      complete the trigger system JHAM (signed by Su Dong or Rainer)  
   There is also a general safety guide (and other hardware tips) on 
   the trigger web page operations section safety row.  

D) Meetings:
   There are 3 regular weekly trigger meetings:
    a) Tuesday  2:00pm  Trigger operations meeting  
    b) Friday  11:00am  Level-3 meeting 
    c) Thursday 9:00am  L1 simulation meeting 
   The meeting agenda and material are posted at:
    a) main page -> Trigger meetings and presentations (Top tab [meetings]) 
    b) main page -> Level 3 Software Trigger  (Top tab [Level-3 Trigger])     
   
E) Information on operations and software & computing access:
   From trigger main web page top tabs: 
   a) Trigger Operations: trigger operations page
      this contains many online operations and monitoring instructions
   b) Trigger Software: Trigger software documentations page 
      This contains instructions on how to run the various trigger  
      software plus various other useful general information on data 
      samples, detector geometry, software tools etc. 
   c) For trigger related disk accesss, please check the trigger  
      software page -> Trigger Disks and Data samples section   

Please let me know if there are incorrect/out of date information 
in this note, or anything else important I should include. 

Su Dong