[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
new simulations for fdc
Dear Mihajlo,
I have seen by accident some new plots from you studying the impact of the
fdc material on the photon reconstruction in the fcal.
First of al thanks a lot for doing these studies. I apologize in advance
if I ask questions which other people have already asked or you have
explained in your accompanying email, but I have only seen the plots.
I was pretty surprised that the overall improvement is not bigger, to
understand this better I have some suggestions what to plot and some
questions.
Questions:
did you simulate for a point like target or for an extended one
what was the photon energy you simulated
did you place a cut that the conversion of the photon did really happen in
the z-range of the FDC
has the material of the cdc end-plate also been changed
do you understand this sharp edge in the photon reconstruction
efficiency around 5 degree
do you have any idea why reducing the radiation length piratically
everywhere by a factor of 2 has so little influence.
Suggestions:
would it be possible to have a 2 dimensional plot showing photons
converting vs z and r (=radial distance from the beamline)
it would be helpful to have this plots for fixed position along the
beamline.
I apologize for so many questions, but the plots are really important and
on the first look not so easy to understand.
Have a nice evening
elke
( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
) `\ -
/ '. | +
| `, Elke-Caroline Aschenauer =
\,_ `-/ -
,&&&&&V Jefferson Lab +
,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
,&&&&&&&&&&; Mailstop: 12H5 Hampton, VA 23664 -
| |&&&&&&&;\ 12000 Jefferson Ave +
| | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
| | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
'--' `-.--. | +
\_ | |---' Tel.: 001-757-269-5352 =
`-._\__/ Fax.: 001-757-269-6248 -
+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+