Minutes from meeting 13 October 2009

Q=Question

A=Answer

C=Comment

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Updates/Progress

Misc.:
Alice and Will C: Someone with karma/more familar with gamma maker should look into TMinuit library issue here: http://www.star.bnl.gov/HyperNews-star/protected/get/phana/388.html
Will C: No Michael,updates on filtering?

Alice Q: Ilya, were you able to run with full geometry yet?
Ilya A: No, adding "east endcap" back in only allows for EEMC only running.

EEMC Geometry Tests

Old:
Discussed yesterday at EEMC meeting
 

New:
Will and Hal C: Need to label "front" and "back" differently
Ilya C: Exclusion is done by not generating material.  Materials added one at a time.
Will Q: What is there?  Is it air?  What?
Will Q: We compare upper left and lower right?
Ilya A: Yes
Hal Q:  UVS refers to particle hitting first U, then V, then S from interaction point?
Ilya A: Yes
Hal C: Seems the wrong way.  U plane in front - less hits?
Will C: A megatile layer is directly in front of shower max.
Ilya C: Shower is not so developed so less hits in first plane.
Will C: What bothers me is that 12 and 2 are not the same - same U/V cadence.  Or is this because you just don't generate material and we don't know what is taking its place?  Many agree.
Ilya C: v-Plane first sectors seem to agree better.
Will C: Should maybe try without LOW_EM option.
Scott C: For pions shower in front layer is narrower than one in back.  j-all plot looks fine.  This is what we really care about.
Ilya, Scott C: In geometry cvs there is no spacer, sectors 11 and 12 were the same?  Or was there air in the spacer?
Hal A: In cvs air was in spacer location.
Jim C: The scale difference for u and v plots makes it hard to interpret.  A 1-D plot would be helpful.
Hal C: Can Ilya send me geometry file with how you did these cases?
All: Energy plots looks good

Plans:
Will Q: Is there separation in towers?
Hal A: "wiggle" Option is there, not implemented.  But isolation gap in eta is there.  Not sure about phi.
Will Q: Do we need more documentation?  Jason added lots of documentation in the form of comments.  What about variables - i.e. LOW_EM option variables?
Will Q: What about TWIST/EGGS?
Hal A: EGGS is similar to Geant3.  Worry about hadrons not doing a good job - what about FLUKA (sp?)?  Seem to remember lots of parameters that dictate how particles are "tracked."
Jim C: Most backgrounds for gamma/jet are EM anyway.
Everyone: We seem stuck until full geometry is working.
Hal C: Someone should contact Jerome directly and see what we can do.
Alice C: Victor just replied to you.