sPHENIX MAPS tracker discussion

[Anthony Frawley <afrawley AT fsu.edu>]

Hi All,

Regarding the MVTX, the basic premise here is wrong. The MVTX total thickness with 3 layers is ~ 1% of a radiation length. This is already not a significant detriment to the physics program.

Best regards

Tony

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From: sPHENIX-MAPS-l <sphenix-maps-l-bounces AT lists.bnl.gov> on behalf of Gunther M Roland <rolandg AT mit.edu>
Sent: Wednesday, September 26, 2018 12:14 PM
To: Rachid.Nouicer AT bnl.gov
Cc: Chiu, Mickey; Todoroki, Takahito; riken-intt-list AT ml.riken.jp; sphenix-maps-l; Molly Taylor
Subject: Re: [Sphenix-maps-l] Next Meeting of the Inner Tracker Task Force

 

Dear Ming, Rachid, 

I am not sure what the final configuration will look like, but I am certain that we will not settle this by email. Once all relevant quantitative studies are in, we'll make any decisions the way we usually do in sPHENIX.

Cheers,

Gunther

On Sep 26, 2018, at 11:27 PM, 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 onlyfor 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 thattwo 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 sameapproach 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

P-25, MS H846                 TEL: 505-667-7125(Office) 

Physics Division                        631-344-7821(BNL)

LANL                                           630-840-5708(FNAL)

Los Alamos, NM 87545  FAX: 505-665-7020

 

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)      /                        /
 Physics Department, Building 510c        /                        /
 20 Pennsylvania Avenue                  /                        /
 Upton, New York, 11973, U.S.A.         / Phone: +1 631 344 8433 /
 E-mail : rachid.nouicer AT bnl.gov       /  Fax: : +1 631 344 3253/
 Web:http://www4.rcf.bnl.gov/~nouicer /                        /
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