AEI-Potsdam: S. Mohanty, S. Mukherjee
CIT: M. Barton, S. Marka, L. Matone, B. Mours, S. Whitcomb, J. Zweizig
Florida: S. Klimenko
LHO: W. Kells, M. Landry, D. Sigg
LLO: R. Adhikari
Michigan: K. Riles
MIT: G. Harry, D. Shoemaker
Oregon: R. Rahkola, R. Schofield
Syracuse: S. Penn, P. Saulson

• The E4 run will begin at noon CDT Friday May 11 (10 a.m. at Hanford) and end at noon CDT Monday May 14. Likely interferometer configurations are discussed below.
• Running will be in 24-hour mode at Livingston, with shifts manned by two IFO operators and two scientific monitors (expert & trainee) - see below. One scientist will be on duty days and evenings at Hanford.
• The 13 E3 investigation teams will continue their work in E4 - see below.
• One purpose of this meeting is to field requests from investigators for special running conditions or for data channels to be included in the reduced data set (RDS). Comments for improving E3 procedures that didn't work well are also welcome.
• The followup teleconference will be the regularly scheduled detector characterization meeting on Friday May 4 at 11:00 a.m. EDT (8:00 PDT). At that meeting, each investigation leader should present a (brief) plan of investigation and make any final special requests. Requests that are difficult to satisfy should be made sooner than that!
• After some discussion it was decided that LHO/LLO telecons will be held Thursday/Friday May 10-11 at 10:00 a.m. CDT / 8:00 a.m. PDT to deal with last-minute issues/problems.
• DMT software writers are reminded that Friday May 4 is the deadline for giving final DMT monitor code to John Zweizig for official E4 running.
• Szabi has set up the official E4 Web Page. Szabi will also collect and post the travel plans of everyone coming to Livingston for E4.

• The Livingston 4K now runs in recombination mode for intervals of tens of minutes. Work is ongoing to achieve recycling, and it may be possible to run in recycling configuration for part of E4. It is likely that there will be at least one configuration change during the run. The decision on what to attempt at LLO during E4 will probably be made early in the week of May 7-11.
• It is highly unlikely that a Hanford interferometer (2K or 4K) will be ready for data taking.

• The shift schedule is in good shape, with nearly every scientific monitoring slot filled (present shift list). One more person is needed for the last Livingston owl expert shift.
• The shifts will be synchronized at the two sites, with day shifts starting at 6 a.m. for Hanford and at 8 a.m. for Livingston, as was done for E3.
• Shift duties for E4 will be quite similar to those for E3.

• The E4 investigation tasks and teams are a continuation of those for E3.
• The default list of channels to be recorded at LLO by the reduced data set (RDS) writer is taken from the final such list used in E3. Requested additions must be made no later than Friday May 4.
• KR proposed that any test points requested for the RDS be temporarily added to the master config file for data acquisition so that they are treated as ordinary data channels. This suggestion is motivated by the experience in E3 of test points disappearing from the data stream, which created havoc for the DMT lock loss monitor (used the normalized X arm transmitted light power) and troubles for the RDS writer.
• Stan didn't like the idea of adding test points to the regular data stream, seeing it as a step backward from our goal of moving toward normal science running. He prefers simply to change operating procedures to prevent test points from disappearing. The apparent problem in E3 was a certain test point manager window on a control room workstation being closed from time to time by someone ignorant of its purpose. There was some discussion of other options for making the test point availability more robust, but there was no clear consensus that it could be made so in time for E4.
• Daniel raised the worry that changing the DAQ master config file would require recompiling the front end software (not merely restarting the processors). He will discuss this with Rolf Bork.
• A decision on what to do for E4 was deferred until we hear from Rolf. It was agreed that a more robust means of monitoring test points in the DMT is needed for the long term. Mike mentioned that the test point troubles in E3 also prevented the injection of standard calibration lines.
• Rana would like to record the test point corresponding to the recycling cavity power pickoff. No other test points have been requested so far, aside from transmitted arm light powers.
• The calibration team requested two dedicated calibration running periods (8 a.m. - noon on Friday, just before the run start; and 8 a.m. - noon on Monday to finish the run. They would also like to inject the same calibration lines used in the E2 run. No one objected.
• Robert wondered whether a vault magnetometer would be available during E4. Szabi said it would not, but that he expects another above-ground coil, distant from the LVEA, to be available.