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[Aschenauer Elke-Caroline <elke AT bnl.gov>]

On Jan 11, 2021, at 10:05, videbaek <videbaek AT bnl.gov> wrote:

Hi I will take at look at this later, I am not completely sure what you mean by
i.e. is the center

of the first module at 0 with the center of the next at (2pi)/12?

Maybe we can chat later  after 11 .30 when I am done with some other work.

Flemming


Elke, The Si sensors are not at the same position. Inner and outer are displaced and alternate wedges are displaced relative to the center of the disk.

yes, I know this, but inner and outer are the same z, so this can be used.

cheers elke

On 2021-01-11 09:59, Aschenauer Elke-Caroline wrote:

Daniel,
maybe I misunderstand, but the 12 wedges in one disk, all sit at one
z, the design I have seen does not allow anything else.
cheers elke

On Jan 11, 2021, at 09:50, Daniel Brandenburg
<dbrandenburg.ufl AT gmail.com> wrote:
Hi All,
I could not join this morning due to another meeting. I have been
working on updating the tracking code to use the correct
module-by-module z location instead of using a single z location for
each disk. I expect that this is an important aspect in resolving
the performance regression issue.  However, I am having a hard time
getting the algorithm for the z location correct.
My algorithm splits each disk into 12 equal angle wedges. Even
wedges are assigned one z location and odd wedges are assigned a
different location (and also separated for inner and outer) My
question is:
Is there an angle offset for the first module -> i.e. is the center
of the first module at 0 with the center of the next at (2pi)/12?
I am having an issue where some hits from GEANT within one of these
(2pi)/12 wedges appear to be in the next z-position, so I thought I
may be off by a fixed angle. I have also histogrammed the positions
but I'd like some confirmation that my understanding is correct.
Thanks,
Daniel
On Sun, Jan 10, 2021 at 11:12 AM Ye, Zhenyu <yezhenyu AT uic.edu>
wrote:

Dear all,
We will have the first weekly FST meeting in 2021 tomorrow
starting at 8:30am EST (BNL local time).

https://drupal.star.bnl.gov/STAR/event/2021/01/11/star-forward-silicon-tracker-meeting

0. follow-ups on review and action items *
1. Integration
by Rahul Sharma, Felix Archampong
2. Hybrid and T-board
by Maowu Nie, Mike Capotosto
3. Mechanical Structure
by Yi Yang
4. Production module assembly
by Xu Sun
*

https://drupal.star.bnl.gov/STAR/event/2021/01/11/star-forward-silicon-tracker-meeting/follow-action-items

Zhenyu
********** ZOOM Meeting ********** **********
ID: 879 0430 2955
Passcode: fSTAR2021
********** ********** ********** ********** *******
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--
Flemming Videbaek
senior scientist
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596

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  \,_  `-/        Brookhaven National Lab                         +

  ,&&&&&V         Physics Dept.,            25 Corona Road         =

 ,&&&&&&&&:       Bldg. 510 /2-195          Rocky Point, NY,        -

,&&&&&&&&&&;      20 Pennsylvania Avenue                 11778       +

|  |&&&&&&&;\     Upton, NY 11973                                     =

|  |       :_) _  Tel.:  001-631-344-4769   Tel.:   +1-631-569-4290    -

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