Star-fst-l mailing list

[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

Below are the questions I asked by email and answers I got by phone.

On Aug 9, 2021, at 10:06 AM, Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:

Hi Matt,

Thank for performing the measurements and putting them into the report. May I have a few questions on the results in the report, and if possible some requests for additional results to be included in the report?

*********** *********** *********** *********** *********** 
Questions

1. How were the coordinate systems in the report determined

"Best match" of the measured positions (Al rings - referred to as ribs, and sensors) to the drawing we provided to him

2. There are three tables "Clouds to Surface Faces Relationship"
1) Clouds to DS RIB
2) Clouds to US RIB

These are the Al half rings

3) Clouds to DS DETECTOR FACE

Sensors 

Can you please explain what each of these tables is for?


*********** *********** *********** *********** *********** 
Requests:

1. Tilted angles w.r.t. the Z axis 
1) Silicon sensors (dark blue wedge-shaped in the drawings on page 1) 
There are three sensors on each module. I understand that not all sensors were measured for disk 1 and disk 3

Yes

2) Peek structures (UNDERNEATH the silicon sensors measured from the reverse side of the sensor)
The sensors are mounted on wedge-shaped peek structures of each module. I see from the drawing on page 1 of the report that you measured those as well. 

Yes

3) Aluminum half rings the modules on mounted on

Yes

2.  Positions 
1) Holes on the Aluminum half rings

Yes, Three holes for each half from front, and three from back.

On Aug 7, 2021, at 9:38 AM, Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:

I am going to verify with him that the data included in the report correspond to the pins on the modules.
I am also going to request for additional info

1. How the coordinate system is determined
2. relative angles of the Silicon sensors in the coordinator system
3. Positions of the holes on the support structures

If you have anything in mind, please let me know.

Zhenyu

On Aug 7, 2021, at 9:26 AM, Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:

Begin forwarded message:

From: "Ilardo, Matthew" <milardo AT bnl.gov>
Subject: RE: need for data from STAR surveys
Date: August 6, 2021 at 1:39:53 PM EDT

Attached please find the report for the STAR Detector. It is subject to change once the detector is installed as a single assembly in the STAR magnet. These numbers are based on each half and how it relates to the model for the detector. The model for the center array is incorrect compared to the way the arrays are installed. Sorry for the delay in processing this report.

Matthew

<BL DETECTOR REPORT.pdf><BR DETECTOR REPORT.pdf>