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[Te-Chuan Huang <tchuang.phys AT gmail.com>]

Hi Zhenyu and Daniel,

The silicon and sTGC geometries could definitely be separated but we may need 
to build up the GEANT hit tables for each of them (g2t_fst_hit and 
g2t_tgc_hit ?).
Currently, Zhenyu Chen and I just modified the old one (g2t_fts_hit) from 
Jason to get our geometries work.
I said “combine the two” just meant to get both geometries work in the same 
geometry tag (just like ftsref6a we were using) for the further tests.

Cheers,
Te-Chuan


> On Jul 11, 2019, at 10:54 AM, Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:
> 
> Hi Te-Chuan,
> 
> Nice work. 
> 
> On the last slide, do you know what the motivation is  to merge FST and 
> sTGC geometries? I think it is better to keep them separated, same for the 
> simulators, so that one can update the FST or sTGC software without 
> worrying about affecting the other one, or how to keep the code 
> synchronized. This is what we did for HFT, with PXL/IST/SSD separated. I 
> brought this idea up of separating FST and sTGC in the simulation software 
> at a forward upgrade meeting about half a year (?) ago, and Daniel 
> Brandenburg (cc’ed) certainly supported it and agreed to do the splitting 
> for the simulators
> 
> Best,
> Zhenyu
> 
>> On Jul 11, 2019, at 9:06 AM, Te-Chuan Huang <tchuang.phys AT gmail.com> wrote:
>> 
>> Dear All,
>> 
>> Sorry, I couldn’t get my presentation ready before the meeting.
>> i have upload it to the meeting drupal page: 
>> https://drupal.star.bnl.gov/STAR/event/2019/07/11/star-forward-silicon-tracker-meeting/simulation
>> 
>> The problem I presented before that only part of the silicons have hits is 
>> now fixed.
>> The issue was the mother volumes containing silicons were too small that 
>> some of the silicons were outside the mother volumes.
>> So, the GEANT couldn’t catch up the material outside the mother volumes.
>> After fixing this issue, everything looks reasonable.
>> 
>> Cheers,
>> Te-Chuan
>> 
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