more on BCAL light yield estimates

[Alex Dzierba <dzierba@indiana.edu>]

Dear Colleagues

It is important for us to understand the apparent factor of 4 discrepancy
between the photoelectron yield estimates and measurements for
cosmic rays using the BCAL test module.  I find the same factor of
4 (roughly) as George -- but I get there by a somewhat different path.

Please read the attached and comment.

Our goal should be to produce a note on our understanding of light
yields since setting specifications for the fibers and SiPM's depend
on this.   In my role as Design Report editor I will generate this note
with help and input from others.   I will also be spending the first week
of December in Regina working with my good friends there on the BCAL
section of the Design Report.

Cheers
Alex
-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Alex R. Dzierba
Chancellor's Professor of Physics (Emeritus)
Department of Physics / Indiana U / Bloomington IN 47405 / 812-855-9421
JLab Visiting Fellow
Jefferson Lab / 12000 Jefferson Ave / Newport News, VA 23606 / 757-269-7577
Home Phone: 812-825-4063  Cell:  812-327-1881  Fax: 866-541-1263
http://dustbunny.physics.indiana.edu/~dzierba/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

fiber_loss2.pdf