[Halld-offline] major upgrade to FCal geometry description

[Shepherd, Matthew]

Richard,

Without visualization it is a little hard to completely double check this.  I don't see any problems, but my ability to read and decipher the XML is limited.  

You say in your commit note that you checked with hdgeant4 visualization.  Do you have the ability to quickly take some screen shots and send to me?  I don't need exact dimensions, but just looking at the ends of the blocks with the steel frames and the cross section view of the unit cell should let us see if there are any obvious problems.  I'll trust you to get all the dimensions correct.

Matt


> On Jul 13, 2017, at 3:03 PM, Richard Jones <richard.t.jones at uconn.edu> wrote:
> 
> Hello Matt,
> 
> Based on your email from about 6 weeks ago (sorry it took so long) I have made the following changes to the FCal description in hdds. The addition of a major amount of material in front of the blocks may or may not produce observable effects in the efficiency/resolution. Please have a look at the pull request on github and offer comments or suggestions.
> 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_hdds_pull_35&d=DwIFAg&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=oyKV5joTkJsuRYv6hh48IMTw3i-IrYD-ZUAHHU0DdAY&m=ESSRVFAV88D2mSBMJROq6bpBhMmaVX7Dgj_3L1V_Y9A&s=hwCgw7sQEagpsGvrWGLvRO9YP89-mWDXqbOoId-AY6E&e= 
> 
> The only thing you highlighted that I did not include is the light cover over the front of the blocks. I could not find any documentation on what this was made of or its thickness, but I surmised that it is probably a lot less than the 0.5" plexiglass sheet, so I just put in the plexi sheet and left it at that. If tell me how much, I can increase the thickness of the plexi a bit to account for the material in the front light cover.
> 
> -Richard Jones