Fnal beam test results update tracking in r plane for ref detectors
This presentation is the property of its rightful owner.
Sponsored Links
1 / 13

FNAL beam test results update -- tracking in (r, ϕ ) plane for ref. detectors PowerPoint PPT Presentation


  • 37 Views
  • Uploaded on
  • Presentation posted in: General

FNAL beam test results update -- tracking in (r, ϕ ) plane for ref. detectors. A. Zhang, V. Bhopatkar, M. Phipps, J. Twigger , M. Hohlmann HEP Group A, Florida Tech 02/24/2014. Methodology. ϕ in the range of (- π /2, + π /2) Actually: (-20mrad, +20mrad). origin. CMS Eta5.

Download Presentation

FNAL beam test results update -- tracking in (r, ϕ ) plane for ref. detectors

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Fnal beam test results update tracking in r plane for ref detectors

FNAL beam test results update-- tracking in (r,ϕ) plane for ref. detectors

A. Zhang, V. Bhopatkar, M. Phipps,

J. Twigger, M. Hohlmann

HEP Group A, Florida Tech

02/24/2014


Methodology

Methodology

ϕ in the range of

(-π/2, +π/2)

Actually:

(-20mrad, +20mrad)

origin

CMS

Eta5

  • Transfer (x,y) to (r,ϕ) coordinates.

  • The CMS straight & Zigzag radial strips have a fixed angle pitch (~1.3mrad). If the origin is selected as the vertex of this trapezoidal detector, strip position can be expressed in ϕ.

  • The vertex was not measured when the data was taken, need to find a way to figure it out (optimization).

  • In the figure above: the starting origin is set at 2127mm to the center of REF2, this point is close to the vertex.

  • The results are tried out for the 4 ref. detectors.

REF

2

X

2127mm


R distribution

r distribution

REF2

REF3

UVA3

REF1

Distribution in R is close to the distribution in X: r≈x

The spacer in UVA3 can be seen


Distribution

ϕ distribution

REF2

REF3

UVA3

REF1

Distribution in ϕ is similar to the distribution in Y: y≈rϕ


Inclusive residual distribution in r

Inclusive residual distribution in r

REF2

REF3

σ=46μm

σ=69μm

UVA3

REF1

σ=55μm

σ=59μm


Inclusive residual distribution in

Inclusive residual distribution in ϕ

REF2

REF3

σ=21μrad

σ=31μrad

UVA3

REF1

σ=23μrad

σ=25μrad


Inclusive residual in r versus r

Inclusive residual in r versus r

REF2

REF3

UVA3

REF1

Another way to look into the residual distributions


Inclusive residual in versus

Inclusive residual in ϕ versus ϕ

REF2

REF3

UVA3

REF1


Ex clusive residual distribution in r

Exclusive residual distribution in r

REF2

REF3

σ=166μm

σ=98μm

UVA3

REF1

σ=89μm

σ=137μm


Ex clusive residual distribution in

Exclusive residual distribution in ϕ

REF2

REF3

σ=75μrad

σ=44μrad

UVA3

REF1

σ=38μrad

σ=56μrad


Inclusive exclusive resolutions

inclusive & exclusive resolutions


Resolution comparison in r and x y coordinate systems inclusive

Resolution comparison in (r,ϕ) and (x,y)coordinate systems (inclusive)

Resolutions in (x,y) are also calculated at this origin.

Resolution in r is very close to resolution in X;

The last column is the resolution in y calculated from resolution in ϕ.

Also, <x>≈<r> and <y>≈<ϕ>*L

σϕ

σy

L=2127mm


Summary

Summary

  • Tracking in (r,ϕ) plane is implemented for ref. detectors and is consistent with the resolution results as in (x,y) plane.

  • This means ϕ resolution for radial CMS/EIC with straight/zigzag strips can be studied, and thus resolution in Cartesian coordinates can be estimated.

  • We are going to implement this study…

ϕ distribution

on CMS sector 5.

Strip pitch: 1.3mrad


  • Login