sPHENIX EMCal discussion

["Huang, Jin" <jhuang AT bnl.gov>]

Dear All,

Following discussion in the EMCal meeting, the EMCal setup macro in the 
sPHENIX simulation has been updated to reflect the current estimation of 
material budge for the readout and support structure. 

To downstream analysis modules, the most significant change is that the G4Hit 
DST nodes for the EMCal electronics is renamed to G4HIT_CEMC_ELECTRONICS, 
which follows the name convention for other subsystems. Also there is a new 
node called G4HIT_CEMC_SPT, which records the hits in the EMCal support 
structure behind the SPACAL modules. 

Specifically, the changes includes 
1. a cylinder of 1.5cm Teflon is used as an approximation for the 
10%-X0-thick light collector and electronics before SPACAL modules. They are 
saved in the DST nodes of G4HIT_CEMC_ELECTRONICS
2. a cylinder of 0.5cm SS310 is used as an approximation for the linear rail 
and support plates for EMCal, which will be installed behind the SPACAL 
modules.  They are saved in the DST nodes of G4HIT_CEMC_SPT

Changes uploaded to 
https://github.com/sPHENIX-Collaboration/macros/tree/master/macros/g4simulations
 
These updates apply for both the master branch (which use the 1D projective 
SPACAL module) and the "2DSpacal" evaluation branch (which has the new 2D 
projective SPACAL implemented). 

Cheers,

Jin


______________________________

Jin HUANG

Brookhaven National Laboratory
Physics Department, Bldg 510 C
Upton, NY 11973-5000

Office: 631-344-5898
Cell:   757-604-9946
______________________________

> -----Original Message-----
> From: sphenix-software-l-bounces AT lists.bnl.gov [mailto:sphenix-software-l-
> bounces AT lists.bnl.gov] On Behalf Of pinkenburg
> Sent: Friday, July 31, 2015 7:06 PM
> To: sphenix-software-l AT lists.bnl.gov
> Subject: [Sphenix-software-l] G4_Magnet.C macro changes
> 
> Hi folks,
> 
> I modified and committed the Babar magnet in our simulations according to
> the following numbers:
> 
>                                 inner radius thickness   length
> Cryostat inner wall 1420              10.0        3790
> Coil and bobbin      1508               93.8       3615
> Cryostat outer wall 1745              25.0        3790
> 
> The material is Al 5083 (5%Mg, 0.4%Mn). Previously it was an Al cylinder of
> 1/3rd of the normal density. The main difference is that the radiation 
> length
> went from 1 to ~1.4. The cryostat doss not have endcaps yet.
> 
> Chris
> 
> --
> *************************************************************
> 
> Christopher H. Pinkenburg     ;    pinkenburg AT bnl.gov
>                               ;    http://www.phenix.bnl.gov/~pinkenbu
> 
> Brookhaven National Laboratory        ;    phone: (631) 344-5692
> Physics Department Bldg 510 C ;    fax:   (631) 344-3253
> Upton, NY 11973-5000
> 
> *************************************************************
> 
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