R&D Tags

The R&D conducted for the inner tracking upgrade required that a few specialized geometry tags be created. For a complete set of geometry tags, please visit the STAR Geometry in simulation & reconstruction page. The below serves as additional documentation and details.

Taxonomy:

  • SSD: Silicon strip detector
  • IST: Inner Silicon Tracker
  • HFT: Heavy Flavor Tracker
  • IGT: Inner GEM Tracker
  • HPD: Hybrid Pixel Detector

The TPC is present in all configuration listed below and the SVT is in none.

   Tag    

 SSD IST HFT IGT HPD Contact Person  Comment

UPGR01

+

 

+

 

 

   

UPGR02

 

+

+

 

 

   

UPGR03

 

+

+

+

 

   

UPGR04

+

 

 

 

+

 Sevil

retired

UPGR05

+

+

+

+

+

 Everybody

retired

UPGR06

 +

 

+

 

+

 Sevil

retired

UPGR07

 +

+

+

+

 

Maxim

 

UPGR08

 

+

+

+

+

Maxim

 

UPGR09

 

+

+

 

+

Gerrit

retired  Outer IST layer only

UPGR10

+

+

+

   

Gerrit

Inner IST@9.5cm

UPGR11

+

+

+

 

 

Gerrit

IST @9.5&@17.0

UPGR12

+

+

+

+

+

Ross Corliss

retired  UPGR05*diff.igt.radii

UPGR13

+

+

+

+

 

Gerrit

UPGR07*(new 6 disk FGT)*corrected SSD*(no West Cone)
UPGR14  +    +  +    Gerrit  UPGR13 - IST  
UPGR15 + + +     Gerrit  Simple Geometry for testing, Single IST@14cm, hermetic/polygon Pixel/IST geometry. Only inner beam pipe 0.5mm Be. Pixel 300um Si, IST 1236umSi  
UPGR20  +         Lijuan   Y2007 + one TOF  
UPGR21   +         Lijuan   UPGR20 + full TOF  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Eta coverage of the SSD and HFT at different vertex spreads:

Z cut, cm

eta SSD eta HFT

5

1.63 

2.00

10

1.72

2.10

20

1.87

2.30

30

2.00

2.55

 

 

 

 

 

 

Material balance studies for the upgrade: presented below are the usual radiation length plots (as a function of rapidity).

 

Full UPGR05:

 

 

Forward region: the FST and the IGT ONLY:

 

 

Below, we plot the material for each individual detector, excluding the forward region to reduce ambiguity.

 

SSD:

 

 

IST:

 

 

HPD:

 

 

HFT: