sPHENIX MAPS tracker discussion

[Grazyna Odyniec <g_odyniec AT lbl.gov>]

Hi Hao-Ren,

A very nice poster.

A few comments for your consideration:

My main concern is:

I am not sure that it is a good idea to complain about huge original 
background in the way you do in “Initial sample of Au+Au” window.

It sounds like complain against CAD and their performance, and this does 
not sound right. They are terrific. And BTW they fixed this background 
by closing collimator a bit. The start is usually difficult, it is 
normal. Please, ask Ming for the advice.

I think it will be enough if you say that the originally higher 
background was eliminated with the cut on cluster size. And this topic 
does not deserve the entire window.

A few other remarks:


Abstract:

3^rd line:

….to be performed by sPHENIX concerns the charged-particle multiplicity, 
which  … ->... to be performed by sPHENIX is the charged-particle 
multiplicity, which …

Last line:

…will be discussed. -> … is discussed.


Status of commissioning the MVTX:

More than 99.99 % … Why not 100%? (are there any pixels dead?)

to my knowledge all were active upon arrival to BNL


Analysis:

point a:

I am not sure if I understand this:

... The vertex candidate Z position is calculated by linearly 
extrapolating the Z position of the constituent clusters in the tracklet 
to the beam …

Do you mean that you extrapolate line which connects the z coordinates 
(positions) of two constituent clusters? (your statement does not say 
it, it is my guess) or you mean something else ?

Thanks and best regards,

Grazyna



On 8/30/23 8:08 PM, Hao-Ren Jheng via sPHENIX-MAPS-l wrote:
> Dear all,
>
> I have updated my QM poster based on the feedback and suggestions 
> during the plot approval today: 
> https://sphenix-invenio.sdcc.bnl.gov/communities/sphenixcommunity/requests/4cba182a-7fd4-4b3f-b9dc-8267b282874a.
>
> Please let me know if you have any further comments or questions about 
> the updated version.
>
> Best,
> Hao-Ren
>
>
>
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