TWIST SOFTWARE MEETING MINUTES
                                                                      September 26, 2001

GEANT
=======

GEANT 2.0

 o Art modified MOFIA to read the TDC headers. This causes the analysis
 of MC data to fail since the begin run record is not filled with the proper
 header info in the MC. The group agreed that for the time being this will
 be dealt with by adding a namelist flag to MOFIA to identify MC events.
 In the future the proper headers will be added to the MC so that real and
 MC data cannot be distinguished.

 o Modifying MOFIA to read the new dt_geo file is still on Konstantin's to
 do list!

 o Paul reported compiling problems of GEANT 2.0 on the ALPHA. He was
 asked to email the error to the group.


MOFIA
======

QOD
 o Kate and Art are continuing to work on testing the histogram comparisons.

 o Producing PAW macro files for QOD is still on Blair's to-do list.

CFM

 o Blair will work on CFM once he's done with To.


Helices

 o Konstantin reported that he can now fit helices using first guess results
 from Art's code using the data structures that Jim and Konstantin agreed
 on.

 o Jim will add his first guess code when it is ready.

Time Zero

 o Blair is adding code so that time zero is referenced to the trigger scintillator.
 This is the correct way of dealing with time zero since it does not result in a
 shift  in time zero as a result of a change in the trigger.

PACT

 o Dave showed some histograms from the PACT analysis that suggest a possible
 mapping/cabling problem in PC plane 7. Sun-Chong reported that he checked
 the map and found it to be consistent with plane 6. Cabling need to be checked
 to resolve this mystery!

 o Dave also reported that he was not able to see a correlation of the PACT data
 with particle type. It was pointed out that in the last few runs a scintillator ADC
 was added which should help identify the particle type.

Chamber Efficiency

 o Sun-Chong discussed chamber efficiencies. The DC efficiencies are ~100%
 at a high voltage of ~1900 V. However he reported a low track-to-trigger ratio.
 The group suggested that this needs to be investigated more carefully since the
 low tracking efficiency might be biasing the efficiency result.

 o Sun-Chong also reported variations in the PC efficiencies from plane to plane
 that he was not able to account for yet.

 o Sun-Chong will continue to work on the efficiency code. The next step is to
 run the efficiency code with the wire efficiencies turned on to determine whether
 there are significant variations in efficiency from wire to wire, or across the
 chamber.

ABSOFT

 o The group agreed to switch to the updated version of the ABSOFT compiler
 since one MOFIA module does not compile with the old version with bound
 check turned on. Art reported that he has been using this version for months and
 has not run into any bugs (yet)!

 o Konstantin reported that he already installed the ABSOFT compiler on JAM
 ( 1GHZ machine).

RedHat 7.1

 o Konstantin will upgrade buffalo, lin06, and Art to 7.1. Rob McDonald will update
 his machine at UA.


--
==================================================================
   Maher Quraan                            TRIUMF
   TRIUMF TWIST Collaboration              http://www.triumf.ca
   email: quraan@triumf.ca                 4004 Wesbrook Mall
   phone: (604)222-1047 ext. 6333          Vancouver, BC
   fax:   (604)222-1074                    Canada V6T 2A3

                http://www.thehungersite.com/

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