E895 Meeting Minutes                 4 February, 1997

Attending:  Gulshan Rai, Nathan Stone, Dieter Best, Heng Liu, Jim Draper,
	    James Symons, Doug Olson, Nu Xu

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News & Status Report:

GR  -   Let me first introduce Nu Xu to all of you.

DB  -   We have figured out how to use software to control the DLT stacker.
	I've run the shell script on PDSF. TAS3 crashed in the middle of
	the job because of segmentation fault. So far I can't run EOSGX on HP
	because it requires large memory, I'll try to creat smaller pass1
	executable.
    -   EOS exabyte stackers are not connected to workstations yet.
    -   I got new TASGEN from Mark, the code can compile beautifully but not
	producing anything. He said it has not been finished yet.
    -   Stony Brook has finished copying all the tapes for 6 and 8 GeV, they
	are being sent to LBL.
    -   I'm running some RQMD (2.3) events right now. Dave krofcheck said he
	wants to make contribution to this effort. He has RQMD (2.3) running
	on OSF, it takes about 40 sec/event. For central events (impact
	parameter at about 4fm), it's like 30 seconds per event on PDSF. We
	should present at the PDSF user meeting not only the CPU usage for
	pass1 production but also for the simulation.

NX  -   Does RQMD work for 2 GeV ?

DB  -   We have to check the results, but it's good to start with for
	the purpose of acceptance, tracking efficiency evaluation. We can
	contact Sorge and show him some plots to get his comments.

NS  -   CVS repository have been completed and installed, and some online
	documentation are available. I'll put step-by-step procedure in a
	file and convert to the web page.

GR  -   Speaking of the web page, Can we have E895 home page linked to the
	RNC's one ?

DO  -   I can do that.

HL  -   The laser filter program has been finished. It's a standalone program
	based on Doug's dts_copy. It turned out to be very tricky to modify
	TAS for this purpose. Anyway, we have been writing several files so
	far, and Jim was happy about the result.

JS  -   Motivated by the possibility to study Disoriented Chiral Condensates
	by looking at Npi0/Npi+ ratio event-by-event in STAR, we may be able
	to do something interesting too. Pi0 decays to Gamma+Gamma, then Gamma
	interacts with the medium (2% radiation length in EOS) to produce
	positron and electron. The electron band is very clean in EOS case.

GR  -   This is certainly very interesting. I propose to start with the
	asymmetric system since the PID is much clean in that case.

JD  -	He plotted the canary readings vs. the run number. You can see
	there are a few structures overall. He compared with some TPC laser
	events, they agree with each other. He needs more data points to
	further prove this. The reason to cause this large variation is still
	not being understood.

GR  -   I got the mail from Mike, he said by adjusting several switches his
	new hit_finder runs faster than the old one.
    -   nsdssi and nsdssm have been transfered to OSU.
    -   I got the survey result from BNL. I've generated the rotating matrix,
	the magnet was rotated by 1.85 degree last time, but this time it's
	not rotated after the e910 experiment. 
    -   So far I only got the set of survey data with magnetic field off. For
	some reasons, the lower pole tip is 1/10 inch higher than the last
	run.  I'm trying to get to the bottom of these problems.
    -   There are 5 fiducial marks on TPC. It seems that the survey people
	had made some mistakes, by swapping the sign of x position of point
	A and B in the front plane, I can manage to get a reasonable fit, but
	3-point fit on the back plane seems to give me better chi-square. I
	will try to get the distortion table by the end of this week.
    -   If the collaborator feel we need more hardware for the next run, we
	should seriously consider it and start talking about it now. We should
	also talk about if we want to go back to the lowest energy and
	accumulate more statistic or take data with the highest energy Ion
	beam?

GR  -   Shall we hold the E895 regular meeting at Davis once a while ?

JD  -   Once a month will be good.

DB  -   I'll prepare the talk for the coming PDSF's user meeting.


					Prepared by Heng Liu