Summary of First E159/E160/E161 Phone Conference Nov. 20, 2000 Due to technical problems, only 3 people could talk at once. First, Steve Rock, Peter Bosted, and Don Crabb talked 1) Steve talked to Steve Williams. There is a chance E158 will be delayed until Oct. 2001 if not ready by February. This could delay us since E158 is supposed to be "finished" before we start. Current plan is E158 runs in Feb. (test run), then May-June 2001, with another 2 month run in fiscal 2002. We will try to find out if we could possibly run our experiments starting in 2002, or whether we will need to wait until 2003. Either way, 2 to 3 years is not very far away. 2) Don agreed to figure out a prioritized list for purchasing target items. The most urgent need is probably the target magnet, followed by the pumps. Don and Steve will also find out how long it might take to place an order (do we have to go for bids)? With this list and a commissioning time frame, we can go to Steve Williams and ask for some purchases to start in this fiscal year, if possible 3) We discussed a logical order of experiments. Although E159 is somewhat easier from the target point of view, there is no competition from other experiments, and the detector is more complicated than for E161. So we agreed that E161 should go before E159. We also agreed that E160 should go first, because it does not need the polarized target. Peter agreed to think about making the E160 and E161 setups as close as possible, so that the main change would be in the target. At this point, Don left and Keith Griffioen joined in. Ray Arnold joined soon after (on Steve's speaker-phone). 4) Keith agrees with the order: E160, E161, E159. 5) Keith and Ray will start investigating what scintillator and PMTs to use for the detectors, and whether ODU and UCLA would be interested in forming a group to build them. 6) We discussed polarimetry. Peter will look into the best solution. This might be: measure polarization of 25-40 GeV photons in a dedicated atomic Compton setup in the first half of the E.S.A. This would also be used to measure the intensity profile in this energy range. We would deduce the electron polarization from the endpoint photon polarization, which we know is the same as for the electron. Peter will think about the question: does the polarimeter need to be down-beam of the collimator, or is up-beam sufficient (this is much more practical). It was discussed to have two foils at different z locations, so that a broader range of photon energies could be covered without having to move the analyzing magnet. UMass might be logical group to build the detectors for the polarimeter. 7) We discussed need to get more collaborators, and graduate students and postdocs from the existing collaborators. Everyone will work on this. There may be interest from Fermilab and/or RHIC experimenters. We need to find groups interested in building beam-line monitors: Ion chamber, Cherenkov detector, and SEQ/Faraday cup. 8) We agreed to meet again by phone conference on Monday Nov. 27 at 1 pm Eastern Time (10 am Pacific). Steve will try to get the phone to work with six connections at once, so we can include ODU, UCLA, and whoever else want to join in. 9) It wasn't discussed, but I will suggest that for now the web pages be maintained and improved: E159 Peter E160 Keith E161 Steve I have added some more links to the E159 page. I will put the beam- related items in /e159/beam, just as a place to keep them. E160 and E161 can them link to the index.html in this directory.