Run Plan -- updated 11 May 2002.
{Nominal start date - 5/22/02}

I. Without the beam package:

- establish operating point for chambers [2 days - day 2] measure
  efficiency for 120 MeV/c pions

- Study beam **need plan here** [3 days - day 5] use straight through
  high momentum pions? other beams such as positrons?  find focus
  (same as above, but not a dispersed beam) how much control do we
  have over the focus position, and beam size at TWIST entrance?

- install trigger scintillator package [1 day - day 6]

- set scintillator voltage and thresholds [1 day - day 7]

- establish trigger in t_0 scintillators

- obtain alignment and t_0 data [2 days - day 9] straight through
  particles at 120 MeV/c; running at 120 MeV/c, dispersed beam,
  multiple B2 settings (2000 Hz X 3600 X 20) events/day

II. With full beam package

- install rest of beam package (few hours)

- commission PACT for use with scintillator

- commission PACT for WC's establish DAQ and pedestal suppression [2
  days - day 11] study gate and timing [1 day - day 12] study pulse
  height vs. operating volts [1 day - day 13]

- study and calibrate the energy cuts in target PC's - stopping
  distribution [5 days - day 18]



III. Take further alignment data for comparison after the run

- 120 MeV/c pions [< 1 day - day 19]

- Stop muons in spectrometer to spray the chambers with decay
  positrons [2 days - day 21] can use cloud muons, stop both upstream
  and downstream 200 Hz * 3600 * 20 => 10^7 per day {Valpo asked to
  come up with plan here}


IV. Ready for field on

- ramp to 2T in one day; take 30 minutes of pion data at 0.5, 1.0, 1.5
  T? [1 day - day 22]

V. Optimize beam

- 30 MeV/c positrons, minimize beam p_perp as tracked through TWIST [4
  days - day 26] (external downstream trigger only if needed)

VI. Initial physics data

- Study systematics of the stopping distribution get data with the
  target centroid shifted "slightly" upstream, centered, and
  "slightly" downstream; can we calibrate out the asymmetry in the
  energy calibration?  We need roughly 24 hours of data @ 2KHz per
  position; stopping peak near edge of target may require more time;
  assume 5 X 24 hours of data, plus five days to play with the gas
  degrader, plus a fudget factor for settings with lower rates [14
  days - day 40]

- beta source alignment data; during a maintenance day [no time charge]

- take data as a function of B field, look for change in the end
  point; one day at 2KHz => 22 hours X 3600 X 2000 = 1.6 X 10^8
  triggers; assume a reduction factor of six => data set of 2.5X10^7;
  1.98, 1.99, 2.01, 2.02T [4 days - day 44]

- study effect of degrader material in the downstream end of the
  detector [4 days - day 48]

- obtain cloud muon beam, stopped in the target [4 days - day 52]
  check that an RF cut can be used to get a beam which is roughly
  unpolarized. What is the upstream/downstream asymmetry?  to obtain a
  comparable data set with a mixed beam at 200 Hz (that is, 2.5*10^7
  in the fiducial volume, 10% beam rate) [20 days - day 72]

- short run with 120 MeV/c pions [a few hours]

- try to stop pions in target [1 day - day 73]

- try to tune negative muons into detector for 0 polarization [2 days - day 75]

VII. Wrap up, field off data

- take more alignment data; straight through particles at 120 MeV/c [1
  day - day 76]

- stopped muons to spray detector [2 days - day 78]


--------------------------
Beam off, ~ 3 September 2002

Subsequent running in October/November 2002 may be dedicated to:
- studies of beam properties
- commissioning of the TEC
--------------------------
Note:
Every two weeks, we get roughly 12 days of running time (ideally)
Therefore, 76 days on this schedule takes at least three months. If we
start the beam-related run plan near 22 May, then the above program
would last at least until about 22 August. Beam is available until 3
September. It seems to me that we need to be careful about how we add
things to the plan, and that discipline will be required to complete
the plan.