Log entry time 20:27:54 on June22,2000

Entry number 44681

This entry is a followup to: 44658

Just a note to further understand Mark's time (charge) estimate needed for this

point (since it seemed different than what I had expected)...

Mark's analysis gives:

	- coll out (Run 2447): with tight W, Q2 and pid cuts:

		315 events/mC

This means 9.2 C of "coll out" running needed (gives 2.9 M "good" events)



To evaluate how to count the 3.5 Coulombs already acquired with 6 msr collimators

in place, there are actually 2 estimates:

	1. using analysis of last night's Run 2438:

		175 events/mC

	    so 3.5 Coulombs scales by (175/315) => 1.9 C "equivalent"



	2. using analysis of May run (run 1416):

		230 events/mC

	    so 3.5 Coulombs scales by (230/315) => 2.5 C "equivalent"



Therefore, the two estimates of how much "open (no) collimator" running needed

at this point are:

	1.   9.2 C - 1.9 C = 7.3 C

or

	2.   9.2 C - 2.5 C = 6.7 C



CONCLUSION:  Split the difference, go for ** 7.0 C ** with no collimators.