Preliminary Run Program 
                         4 December 1996 15:45am
================================================================================

                                       SYSTEMS ABBREVIATION:
                                       Ac  = Accelerator       
LEFT COLUMN SYMBOLS:                   BL  = Beam line devices
Tag = tagger magnet field on           DC  = Drift chambers
Rad = tagger radiator in beam          Ec  = Electromagnetic calorimeter
Tor = CLAS torus field                 Ta  = Tagger
Min = Mini-torus field                 TOF = TOF counters
Tgt = CLAS target in beam              Tr  = Trigger + DAQ
Tst = Test target in beam

T R T M T T
a a o i g s
g d r n t t                                                Estimated    Systems
                                                         8-hour shifts

                   Thursday 8:00am

- - + - - -  1  Tune 2.4 GeV beam to Faraday cup               1        Ac, BL
                Check operation of Faraday cup

             2  Optimize background rates vs beam steering     1        Ac, BL,
                tune beam counters                                      all
                measure rates in detectors, observe 
                events in CED 

             3  Tune lowest possible beam current ?
                (skip if background rate is acceptable ?)
 

- - + - - +  4  Aluminium target in beam 
                take data with different triggers              3-4       all
                Energy sum EC (low, high thr.), 
                TOF (OR), EC.TOF, ...


                   Saturday 8:00

- - - - - -  5  Change to CLAS target operation                2        Ac, BL,
                                                                        Hall B

+ - + - - -  6  Tune 2.4 GeV beam up to tagger dump            1        Ac, Ta,


                   Sunday 8:00am                                                                        BL

+ - + - - -  7  Measure background rates (from tagger dump)    0.5      all
                in CLAS and tagger detectors 


- - + - - -  8   Steer electron beam to Faraday cup            0.5      Ac, BL

             9   Measure background levels in detectors        0.5      all

- - + + + -  10  Mini-torus on  
                  Thin C target in (L < 10^33 cm^-2 s^-1
                  => 3 mg/cm^2 12C at 100nA)

             11  Ramp up mini-torus current in steps of 500A   1        DC, TOF,
                 up to 8000A, measure DC currents and                   EC
                 rates in TOF, EC, DC, observe hits with CED     


             12  Electron triggers (Level 1):                           TOF, TR,
                      TOF.EC                                            EC

             13  Vary EC energy threshold to get clean trigger 0.5      EC
                 Check events using CLAS Event Display (CED)            all


                  Monday 8:00am
              
             14  Take data with EC, TOF, TOF.EC to check       0.5      EC, TOF 
                    efficiencies

             15  On-line histograms for diagnostics

             16  Write data for off-line analysis:             4       all
                 Various level 1 triggers (see trigger table)
                 C and CH2 targets
                 Vary DC gains ? (to be defined)
                 Others (to be defined)

             17  Test cluster finder for Level 2 
                  (may not be available)


- - - + + -  18  CLAS Torus off, Mini torus on
                  Take data with minimum ionizing trigger      1        EC, TOF
                  in EC, TOF for calibration


- - - - + -  19  Torus off, Mini torus off                     0.5      DC, EC,
                 Very thin target (0.3 mg/cm^2,                         TOF
                 L = 10^32/cm2sec)
                 Test DC performance for alignment 
                 measurements with straight tracks, 
                 use minimum ionizing 
                 trigger, and various thresholds in EC


+ + - - - -  20  Tagger magnet on, radiator in, beam ctrs at 
                  Faraday cup:                                2      
                  Write data to check tagger 
                  counter timing, etc.

===============================================================================
                                total                       19 - 20 

                             # scheduled run shifts           20.0