sPHENIX HCal discussion

[Edward Kistenev <kistenev AT bnl.gov>]

Thanks, Ron, pictures are always better then 1000 words. I would love also to get TH2 of the data in the figure. There are also couple of extra figures to see

- Light yield across the tile at 10, 50 and 90 cm distance from narrow side;

- Light yield along both legs of the fiber and along the line in the middle (between fiber legs) along the loop length;

- Light absorption length (lateral) vs X/Y position of a source (you may think that light is collected in two fiber points closest to emission point);

- add Al foil or Al’ed mylar on top surface and remeasure few points;

- same with black paper;

- same with Al foil and black paper then replace black paper by plastic used at UNIPLAST and try to see the difference;

I am confused by the depth of the valley along the tile central line. The party rule for the tile grooving was 1:2:2:2:1 (division of tile in lateral direction) - would be nice to understand this difference.

Finally fibers in the short tiles were 25+2*10 cm long - cladding light was dominant what explains x2 lower light yield. 

Thanks again

Edward

;

 

Edward Kistenev, PhD

PHENIX Physicist

On Oct 27, 2015, at 6:17 PM, Ron Belmont <ron.belmont AT colorado.edu> wrote:

Hi All,

I've uploaded a brief set of slides showing the first results from the big tile tests to my phenix/p/draft area: https://www.phenix.bnl.gov/WWW/p/draft/belmonrj/HCal/bigtile.pdf

Comments and suggestions are welcome!  If you're not on PHENIX but would like to have a look, please let me know and I'll send them to you directly.

Cheers,

Ron

--

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Ron Belmont
Postdoctoral Research Associate
University of Colorado, Boulder
ron.belmont AT colorado.edu
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