PROPOSED RUN LIST FOR THE JULY 2000 TEST BEAM WITH THE Q4 CHAMBER.
(vers. 17/04/00)

DEFINITIONS: Q4 is with horizontal wires, which are perpendicular to the 
beam. The magnetic field is parallel to the beam. 
PHI is the rotation angle around the chamber VERTICAL axis.  
THETA is the rotation angle around the horizontal axis (i.e., the wires).
For space limitation inside the magnet, PHI < 20 deg.


1) DEFINITION OF THE BTI SETTING PARAMETER (I.E. THE TOTAL DRIFT TIME)
      B = 0 T
      XOFF
      Minimal BTI acceptance
      LTS OFF
      PHI = 0
      THETA = 10, 20, 30, 40 deg (4 runs/angle to find the best setup)

Here we define the best BTI setup's at different angles at zero field. 
Let's call the setup's: S(10), S(20), S(30) and S(40).

      		Total = 16 runs

2) CHARACTERIZATION AT ZERO FIELD - I
      B = 0 T
      LTS OFF
      PHI = 0

      XOFF
      Standard BTI acceptance
      THETA = 0, 10 deg with S(10)
      THETA = 20 deg with S(20)   

      XOFF - XON
      Standard and max BTI acceptance
      THETA = 30 deg with S(30)
      THETA = 40 deg with S(40)

      		Total = 11 runs

3) CHARACTERIZATION AT ZERO FIELD - II
      B = 0 T
      LTS OFF
      PHI = 0
      XOFF
      Standard acceptance
      CHARGE THRESHOLD = standard (4 fC)
      S(10) and S(20)
      THETA = 0, 10, 20, 25, 30, 35, 40, 45, 50 deg

      			Total = 18 runs


4) CHARACTERIZATION AT ZERO FIELD - III
      B = 0 T
      LTS OFF
      PHI = 0
      XOFF
      S(10)
      Standard acceptance
      THETA = 25, 30, 35, 40, 45, 50 deg
      CHARGE THRESHOLD = lower and higher than standard (3 and 6 fC)

      			Total = 12 runs

5) CHARACTERIZATION IN MAGNETIC FIELD - I
      LTS OFF
      XOFF
      Standard acceptance
      S(10)
      PHI = 0
      THETA = 0 - 10 - 20 deg.
      B = 0.2, 0.4, 0.6, 0.8, 1.0, 1.2 T

      			Total = 18 runs

6) CHARACTERIZATION IN MAGNETIC FIELD - II
      LTS OFF
      XOFF
      S(10)
      THETA = 0 
      PHI = 10 - 20 deg
      B = 0.2, 0.4, 0.6, 0.8, 1.0, 1.2 T
      Standard acceptance and max acceptance

      			Total = 24 runs
      
7) DEFINITION OF THE BTI SETTING PARAMETER IN MAGNETIC FIELD
      Minimal BTI acceptance
      PHI = 0
      XOFF
      LTS OFF
      B = 0.6 T
      PHI = 0
      THETA = 10 deg (4 runs to find the best setup)
Let's call the setup S(0.6T)

      Minimal BTI acceptance
      PHI = 0
      XOFF
      LTS OFF
      B = 1.0 T
      PHI = 0
      THETA = 45 deg (4 runs to find the best setup)
Let's call the setup S(1T)

      			Total = 8 runs


8) CHARACTERIZATION IN MAGNETIC FIELD - III
      LTS OFF
      XOFF
      Standard acceptance
      S(0.6T)
      PHI = 0
      THETA = 0 - 10 - 20 deg.
      B = 0., 0.2, 0.4, 0.6, 0.8, 1.0 T
      
      			Total = 18 runs


9) CHARACTERIZATION IN MAGNETIC FIELD - IV
      LTS OFF
      S(1T)
      PHI = 0
      THETA = 45 deg.
      B = 1.0 T
      XOFF - XON
      Standard and max acceptance
      
      			Total = 4 runs

10) CHARACTERIZATION IN MAGNETIC FIELD - V
      LTS OFF
      XOFF
      S(0.6T)
      THETA = 0
      Standard and max acceptance
      PHI = 10 - 20 deg
      B = 0.2, 0.4, 0.6, 0.8 T

      			Total = 16 runs


Grand Total = 145 RUNS, 57 with B = 0 and 88 with B > 0.

If the SiBT max rate is 600 ev/spill, 4 spill/min means 140 kevents/hour.
The efficiency, that is the number of BTI trigger in the correct time 
(in phase with the beam trigger) is 16%. So 1/2 hours means 11000 ev., 
which seem enough (1% precision).
Considering a total time of 1 hour/run (1/2 data taking + 1/2 hour
to change the setup - angles, B, ... -) we need 145 hours = 6 days 
at 100% efficiency for the above program.