[DIRC] meeting Wednesday

[Carsten Schwarz]

Hi,

there are 2 files in the repository


test_barrel3 is a spherical lens with 35x35mm2

test_barrel3_cyl is a cylindrical lens with 35x70mm2

the bar is in both cases 17.5x35mm

I attached some pictures

Now I leave since it is a holiday here. Fathers day is celebrated in 
Germany different from other parts of the world...

http://en.wikipedia.org/wiki/Fathers%27_Day#Germany

Best regards
Carsten


On 05/09/2013 03:55 AM, hyde at jlab.org wrote:
> Dear Carston,
> The cross section of your lens designs, 15 mm x 35 mm matches
> the DIRC bar cross section.
> However, the expansion volume is of course larger than the bar,
> and includes a 'step down' of ~10mm.
>
> I have been discussing with Heghine the possibility of
> using a lens with a square cross section:  35 x 35 mm.
> I am hopeful that this would allow us to better transmit and image
> the large angle photons (particularly from tracks near 90deg).
>
> We realized today a problem, however.
> With your most recent design, it is impossible to expand the
> profile to square:  the thickness parameter of the second lens, currently
> 1 mm (thickness at edge) becomes negative (the radius of curvature
> of the second interface is too small).
>
> I wonder as you explore different lens parameters, if it would be able
> to explore designs compatible with a square lens.
>
> Sincerely,
> Charles
>
>
> _______________________________________________
> DIRC mailing list
> DIRC at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dirc


-- 
--
Dr. Carsten SCHWARZ               C.Schwarz at gsi.de
                                   Hadron Physics/PANDA
                                   Room SB3 4.180

Phone:  +49-6159-71-2765   FAX:   +49-6159-71-3762
PGP: http://www-aladin.gsi.de/~carsten/pgp.asc

GSI Helmholtzzentrum fuer Schwerionenforschung GmbH Planckstr. 1
D-64291 Darmstadt

www.gsi.de

Amtsgericht Darmstadt, HRB 1528
Geschaeftsfuehrer: Prof. Dr. Horst Stoecker, Peter Hassenbach;
Vorsitzende des Aufsichtsrates: Dr. Beatrix Vierkorn-Rudolph,
Stellvertreter: Ministerialdirigent Dr. Rolf Bernhardt
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_screen.png
Type: image/png
Size: 75966 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0006.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_x.png
Type: image/png
Size: 9224 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0007.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_y.png
Type: image/png
Size: 9837 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0008.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_cyl_screen.png
Type: image/png
Size: 60148 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0009.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_cyl_x.png
Type: image/png
Size: 9097 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0010.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: test_barrel3_cyl_y.png
Type: image/png
Size: 9434 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/dirc/attachments/20130509/07e4c682/attachment-0011.png