Gif cosmic and beam trigger system and geant4 flux simulations
Sponsored Links
This presentation is the property of its rightful owner.
1 / 10

GIF++ cosmic and beam trigger system and Geant4 flux simulations PowerPoint PPT Presentation


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

GIF++ cosmic and beam trigger system and Geant4 flux simulations. Dorothea Pfeiffer. GIF++ SBA Presentation 14 .03.2013. Flux simulations. Detailed study with FLUKA dose and flux simulations by Bart Biskup

Download Presentation

GIF++ cosmic and beam trigger system and Geant4 flux simulations

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


GIF++ cosmic and beam trigger systemand Geant4 flux simulations

Dorothea Pfeiffer

GIF++ SBA Presentation

14.03.2013


Flux simulations

  • Detailed study with FLUKA dose and flux simulations by Bart Biskup

    (B. Biskup, "Studies for GIF++," CERN, 30 11 2011. [Online]. Available: http://indico.cern.ch/getFile.py/access?resId=1&materialId=1&confId=115583.)

  • Opening of angles upstream and downstream to +/- 37 degrees vertically and horizontally made recalculation necessary, since a lot more scattering occurs

  • Further the shielding request of the cosmic trigger and the beam trigger groups necessitated new simulations

  • After several iterations the flux for all chambers is at or under the requested maximum values

Dorothea Pfeiffer


GIF++ Geometry

  • Irradiator with lead filters

  • RPC chambers surrounded by 4 cm of steel

  • Floor chamber also covered by 17 cm of steel

  • Beam trigger shielded by 5mm Tungsten rubber

  • Roof chamber shielded by 2 cm lead plate in air

Beam trigger

Lead shield for roof chamber

Irradiator with filter frame

roof chamber

Beam trigger

Finetracking chamber

floor chamber

Steel floor (2 cm)

Dorothea Pfeiffer


GIF++ projection yz

Average flux above source 4.7e5 s^-1 cm^ -2

roof chamber

Lead shield

steel plate

fine tracker

floor chamber


GIF++ projection xz

Downstream beam trigger:

average flux 1.8 e4 s^-1 cm^ -2

Average flux 1.0 e5 s^-1 cm^ -2

roof chamber

Upstream beam trigger:

average flux 5.9 e4 s^-1 cm^ -2

Average flux 5.1 e5 s^-1 cm^ -2

Average flux 1.2 e3 s^-1 cm^ -2

floor chamber

fine tracker


Cosmic and beam trigger

  • Beam trigger uses 40 cm x 60 cm TGC quadruplets and will be used during muon beam time and when muon halo is available

  • Beam trigger uses 5 L of mixture of CO2 and flammable n-Pentane (heated stainless steel pipes needed -> n-Pentane liquid at room temperature)

  • Upgrade with larger chambers is foreseen to improve halo triggering and enable triggering of horizontal cosmics

  • Cosmic trigger uses RPCs and will be used for vertical to ~ 45 degree cosmics when beam or halo are not available

  • Gas mixture 95% C2H2F4. (tetrafluoroethane) and 5% C4H10 (isobutane)

Dorothea Pfeiffer


Cosmic triggger: top tracker

  • Trigger and high time resolution.  

    • 4 independent detectors area 1x0.5 m2. Gap structure to be finalized

    • strips 3 cm wide;  

      • The 1 m long strips (16 per read-out panel) in all 4 RPCs

      • 0.5 m long strips in 2 out of 4 chambers.  

      • # strips: 64 x 2 = 128 strips

  • Fine tracking. 

    • One or 2 RPC 30x30 cm2with 1 cm strips in both direction ( 32 strips vertically + 32 strips horizontally). Centroid reconstruction in both directions.  # strips: 64

Fine trackers

40 cm

  • Y-Z readout

  • Y only readout

  • Y-Z readout

  • Y only readout

30 cm

30 cm

100 cm

50 cm

View from bottom

Slide: courtesy G. Aielli


Cosmic trigger: bottom tracker

  • Trigger and high time resolution:

    • One chamber 1x0.5 m2 as for the top tracker: strips: 16 + 32 = 48

    • Fine tracking: 1 chamber 30x30 cm2 as in the previous point.  # strips: 64

  • Underground detector

    • One doublet chambers:  size 2.8 x 2.4 (=2x1.2) m2  (two chambers; bi-dimensional read out with 40 mm strips. .  # strips: 224  (20 E/ channel)

Fine tracker

Y-Z readout

Iron shielding

30 cm

50 cm

Concrete

30 cm

100 cm

Concrete

240 cm

280 cm

Slide: courtesy G. Aielli


Beam trigger: test beam setup

sTGC quadruplets within the

Mechanical frame. Allows to

Adjust the quadruplet position

Monitor chambers

For external reference

Needed to select parallel tracks

Slide: courtesy G. Mikenberg


Beam trigger: layout

Slide: courtesy G. Mikenberg, Y. Benhammou


  • Login