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["Cacace, Daniel" <dcacace AT bnl.gov>]

Hi All,

Attached are some slides with images of the model that are 95% up to date. If you want completely updated images or any additional views, let me know.

TPC Line Laser FDR - Design Update.pptx

Laser Images.pptx

Cheers,

Dan Cacace
sPHENIX & ePIC
Physics Department
Office: 631.344.2197
dcacace AT bnl.gov

---

From: Thomas K Hemmick <tkhemmick AT gmail.com>
Sent: Monday, August 28, 2023 12:01 PM
To: Ross Corliss <rcorliss AT mit.edu>; Cacace, Daniel <dcacace AT bnl.gov>
Cc: Hughes, Charles [PHYSA] <chughes2 AT iastate.edu>; sphenix-calibration-l AT lists.bnl.gov <sphenix-calibration-l AT lists.bnl.gov>
Subject: Re: [Sphenix-calibration-l] Steerable Laser QM 23 Poster - Note and Poster

 

Hi guys

I added Dan Cacace to the reply since I think he has an even prettier and more up-to-date version of the CAD model.  

Tom

On Mon, Aug 28, 2023 at 11:47 AM Ross Corliss via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

Hi Charles,

Looks like a decent start.  I assume the bubbles are:

Abstract

"Here's a collision environment and the effect on a track"

"Here's the laser device as installed"

- I propose the attached picture as a more useful sketch than the somewhat noisy thing with all the dangling wires.  that way you have one 'here's the picture' and one 'here's it is installed'.

"Here's how we find our laser in the chamber"

- I think the xy and the transform are a good pair to show.  might want to highlight where the transform is wrt.  

- did we ever establish what some all of that noise was?  I think it was hits being pulled away from the laser path by charge sharing across module boundaries?

- the static field seems out of place here.  Maybe trim that down to only the R component so you can make it larger, and move it to the next bubble

"Here's what happens when we look for our laser with distortions"

- the point being that we want to have a search window that captures all the real hits, so we can compare their positions to their expectations, knowing this large R distortion exists.

 -- nb that the stripe at large R is because the simulation didn't let electrons drift beyond the OFC.

"Here's how we fill space with the lasers"

- I assume this will include the 'want to cover each Z interval with a fixed r-phi spacing of laser lines, in TPC coordinates' or other introduction.

- Not the best coordinate system graphics, if you have time to clean them up.  It would be really neat to see where that hole at theta=0, phi=180 is.

...Obviously don't use my bubble titles.  ;)

-Ross

On Aug 28, 2023, at 4:07 AM, Hughes, Charles [PHYSA] via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

Hello All,

Sorry for the delay. I know we are running out of time.

I have a draft poster and accompanying note on invenio for QM 23 for my poster:

"Characterization of Static Distortions in the sPHENIX TPC with a Steerable Laser System"

Draft Note:

https://sphenix-invenio.sdcc.bnl.gov/records/vey2n-xc948

Draft Poster:

https://sphenix-invenio.sdcc.bnl.gov/records/dzykp-v3g79

Unfortunately, my poster is not finished. I have been working on some other things in the past weeks, it's 4 AM and I have done what I can for tonight (obviously more work to do in next couple of days). I figured it's best at this point to get these out here for feedback before 08/30 (which is the last approval date for QM).

I have shown most of these plots I'm requesting for approval in the calibrations meeting last week, so they aren't totally new, but this is the first time I'm showing the poster and note as a (mostly) complete piece.

Feeback welcome (again, it's not 100% done).

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