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Re: forward endcap quest goes on [message #8939 is a reply to message #8616] Thu, 02 July 2009 15:57 Go to previous messageGo to previous message
Aleksandra Biegun is currently offline  Aleksandra Biegun
Messages: 64
Registered: May 2007
Location: Groningen
continuous participant
From: *
Hi Irina, hi All,

the problem Irina has had with the forward endcap
with GEANT 4 is fixed now.
Somehow, the single Reflection() I have made
for Quarter number 2 and 4 caused the problem with the Z shift.

So, I have changed the macro which creates the geometry
of the forward endcap (FwEndCap) and now it is called:
It does not have Reftection() function.
It is committed to svn to:
and creates the root file with the same name like was before,
i.e. emc_module3new.root
(also commited to svn),
so you don't need to do any changes,
just do svn update.

I also had to change a little bit

I put the same plots made twice:
for GEANT 4 and, to compare, for GEANT 3.

At the plots:

you can see that Z-position for all 4 Quarters of the FwEndCap
is in the same Z for GEANT 4. For GEANT 3 it was fine before.

The mapping is also fine, should be the straight line
in each Quarter (each copy), what you can see at plots:
xpad_x_points_m3_g4_fixed.png - for X direction
ypad_y_points_m3_g4_fixed.png - for Y direction

Quarters of the FwEndCap are placed in the clockwise direction looking downstream.

Different parameters for Points, also Z-position of all 4 Qarters, are shown at plots:

points_g4_fwendcap_m3changed_fixed.png - for GEANT 4
points_g3_fwendcap_m3changed_fixed.png - for GEANT 3.

Irina, please check it.
I do hope there will not be any problem, but in case of any,
let me know.

If you have any question, do not hesitate to ask.

Best regards,

Aleksandra Biegun
University of Groningen/KVI
Zernikelaan 25, 9747 AA Groningen
tel. +31 50 363 3630
fax. +31 50 363 4003
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