Proposal for December 1996 Hall B Commissioning
                           V. Burkert and D. Sober
                           DRAFT  -  25 Sept. 1996

        INTRODUCTION

        Since the July 1996 CLAS meeting, several significant changes have
        occurred which affect our planning.  Among these are: 

        1) The dates for the first beam in Hall B have been shifted from 22-27
        November to 5-11 December, a delay of 2 weeks and an increase from 6
        days of beam to 7.

        2) Although the Region I drift chamber will not be in place by
        December,  the Region I mechanical prototype will be installed with a
        few wires instrumented to allow measurement of rates and backgrounds.
        
        3) The south clamshell will not be moved to the installed position,
        in order to allow the Large Angle TOF installation to continue.

	4) The forward carriage will be moved (on Nov. 7) to a position 
	approximately 4 feet from its full forward position, and will remain
	there for the December run.
	

	PROPOSED SCHEDULE (consistent with the Sept. 20 installation meeting):
        
	Oct. 28		Last Reg. II chamber installed.
			Remove Reg. II installation cart and rails.
			Begin cooldown of torus.

	Oct. 30 - Nov. 1
			Install 5 o'clock Cherenkov counter

	Nov. 4 - 6	Install first Reg. III chamber.

	Nov. 7 -8 	Move forward carriage partly forward (within 4 feet of
			nominal installed position) to allow work in downstream
			tunnel.

        Nov. 11 - 15	Continue Region III installation and cabling.

	Nov. 15		Safety review

	Nov. 18 - 21	Complete cabling of detectors, trigger, DAQ.
	
	Nov. 22		Begin cosmic ray tests.

        Nov. 22 - Dec. 1
			Cosmic-ray testing of all installed systems 
			(using trigger counter at CLAS target position).
			Complete installation of beamline, target, mini-torus.

	Dec. 2		Energize torus magnet cosmic ray and beam run

	Dec. 5 - 11	Beam        
   
        Adequate personnel must be made available for both the cosmic-ray
        and the beam runs.
	MINIMAL READINESS REQUIREMENTS FOR COSMIC-RAY AND BEAM TESTS:

	o  Minimal DAQ and trigger (Level 1, Level 2 cluster finder for 
	   10-45 deg. angle range) , run control, CED, online histograms

 	o  At least one sector installed, instrumented, operational:
       	   		Reg.II + Reg.III + TOF + EC + CC

	o  Reg. I prototype installed for rate measurements

	o  Basic beam line instrumentation:
    		BPMs (Accel. Div.) 
    		vacuum
    		Faraday cup
		targets for (e,e'):  12C (0.3, 3, 30 mg/cm2), CH2 (3 mg/cm2)
    		mini-torus
		beamline counters

	o  CLAS torus

	o  Tagger magnet and beam dump



                                
	GOALS OF COSMIC-RAY RUNS

        o  Check out trigger, DAQ, and run control

        o  Check on-line monitoring and event display

        o  Check operation of installed detectors (HV, timing, ...)

        o  Check reconstruction software

        o  Perform minimum ionizing particle calibration of ECs, TOFs (?)

        o  Other:  To be provided by Working Groups

        o  Take data with torus B field OFF/ON (leave ON for beam run)



	ORGANIZATION OF DECEMBER RUN:  (First attempt - 25 Sept. 1996)
	
	A run coordinator for the December run should be elected at the
	October 12 CLAS Collaboration meeting.
    
	A detailed task list and run schedule, based on the best information 
	at the time of the October 12 meeting, will be approved by the CLAS 
	Collaboration.  This schedule can be modified as necessary by
	the run coordinator and the hall leader.

	Each working group must schedule sufficient personnel to cover the 
	shifts for which it is responsible according to the task list, and
	submit a complete list of staffing to the run coordinator.

	For each task for which the working group has responsibility, a task
	supervisor should be named by the working group.  

	Because of the substantial uncertainties in the time required to get 
	beam into the hall, the scheduling of each task should initially be 
	considered uncertain by (at least) plus or minus two shifts.

	At 4:00 PM each day, the run coordinator will announce revisions in the 
	run plan which are to be effective at 8:00 AM the following morning.
	The run coordinator will appoint a shift supervisor for each of the 
	following day's shifts.