sPHENIX MAPS tracker discussion

[Barbara Jacak <bvjacak AT lbl.gov>]

Dear all,

Redundancy in the inner tracker is a must. The particles at RHIC are much softer than those looked at by ATLAS and CMS, so the optimization is likely different for sPHENIX.

best regards,

Barbara

On Wed, Sep 26, 2018 at 8:32 AM nouicer <rachid.nouicer AT bnl.gov> wrote:

Dear Ming, 

> To me, it seems 2-layer (or 3-layer for high efficiency) INTT already sufficient and preferred for better Upsilon resolutions. 

 
To me, the same thing can be said for MVTX, I believe we only need two layers of MVTX layers. The third MVTX layer is only for redundancy in case dead region. The MVTX total radiation length is already > 5% with three layers. 
 
I believe it is too risky to have only two INTT layers, in case we have a dead region from beam blast. I don't agree with you that two INTT layers ALREADY sufficient!

I think if we take a conservative approach towards MVTX ( 5% radiation length) , three layers, I think we should take the same approach for INTT, three layers. 
 
ATLAS/CMS have three layers for the intermediate tracker and two layers for inner tracker pixel/hybrid in the new upgrades.

Sincerely, 
Rachid  

On 09/26/2018 10:58 AM, Ming Liu wrote:

Hi Christof, Tony and all,

 

What is the status of evaluating the impact of INTT on vertex seeding in high rate p+p/p+A collisions? It seems this is pretty much the last major item to be resolved to address the recent MVTX review committee’s recommendations:

 

You have already made excellent progress with tracking simulations and showed that:

1. For the global tracking, MVTX+TPC is already showing excellent rejection of pileups in pp collisions, INTT seems not contributing much for further rejection power.   
2. Tracking efficiency seems very similar for 2/3/4 layers of INTT.
3. Di-electron mass resolution prefers less INTT layers (or less mass in general)

 

To me, it seems 2-layer (or 3-layer for high efficiency) INTT already sufficient and preferred for better Upsilon resolutions.

 

Cheers,

Ming

-- 

Ming Xiong Liu

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From: sPHENIX-MAPS-l <sphenix-maps-l-bounces AT lists.bnl.gov> on behalf of Christof Roland <christof.roland AT cern.ch>
Date: Tuesday, September 25, 2018 at 7:21 PM
To: Jin Huang <jhuang AT bnl.gov>
Cc: Mickey Chiu <chiu AT rcf.rhic.bnl.gov>, sPHENIX-INTT <sphenix-intt-l AT lists.bnl.gov>, Sanghoon Lim <sanghoon.lim AT colorado.edu>, Molly Taylor <mitay AT mit.edu>, sphenix-maps-l <sphenix-maps-l AT lists.bnl.gov>, Takahiro Todoroki <todoroki AT rcf.rhic.bnl.gov>
Subject: [Sphenix-maps-l] Next Meeting of the Inner Tracker Task Force

 

Hi Everybody,

 

tomorrow we will have the next meeting of the Inner Tracker Task Force. 

The indico page, bluejeans link and google doc can be found here:

 

https://indico.bnl.gov/event/5106/

 

https://bluejeans.com/553808487/

 

https://docs.google.com/document/d/17PJdu94Ydg25V-cTHIYfSbkfojH4ZUEfsfoZPm0RDb0/edit

 

See you tomorrow!

 

   Christof 

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                                               /                        /
 Rachid Nouicer                               /                        /
 Physicist, Brookhaven National Laboratory   /                        /
 Address:                                   /                        /
 Brookhaven National Laboratory (BNL)      /                        /
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