More on BCAL energy deposition

[Alex Dzierba <dzierba@indiana.edu>]

Hi All

Please see the attached.  In this note I show calculations of BCAL
energy loss per layer as calculated using the analytical form for
longitudinal energy profile, under different assumptions about
the critical energy and Pb/SciFi matrix radiation length and comparing
these with Blake's GEANT-based simulations at 90 degree and
40 degrees incidence.  At 90 degrees incidence it does not seem
possible to simultaneously get good agreement between analytical
and simulations for layers 1 and 2.  Perhaps it is important to
take into account the transverse shape of the shower.  The latter
information is probably even more critical in extending the analytical
results to 40 degrees incidence.  The goal, of course, is to validate
the simulations and then use information on the expected deposition
per layer as a constraint in the calibration.

I understand that Zisis is re-calculating the effective radiation
length for the matrix.

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/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

BCAL_res_cal4.pdf