1 / 8

TPG Drift Studies

TPG Drift Studies. Concentrate on Helium based gas mixtures Energy loss of charged particles through ionisation in gas clusters/cm, electrons/cluster Drift properties of electrons Drift velocity, transversal diffusion, longitudinal diffusion.  HEED.  Magboltz.

gocasio
Download Presentation

TPG Drift Studies

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. TPG Drift Studies Edda Gschwendtner

  2. Concentrate on Helium based gas mixtures • Energy loss of charged particles through ionisation in gas • clusters/cm, electrons/cluster • Drift properties of electrons • Drift velocity, transversal diffusion, longitudinal diffusion  HEED  Magboltz Edda Gschwendtner

  3. He/CH4 mixtures: Clusters/cm cluster/cm Ekin = mc2 ( -1) mc2 () ~ 105 MeV  ( -1) ~ 2 cluster/cm electrons/cluster for 200MeV/c muons electrons/cluster for 200MeV/c muons gamma-1 gamma-1 Edda Gschwendtner

  4. He/CO2 mixtures: Clusters/cm cluster/cm Ekin = mc2 ( -1) electrons/cluster for 200MeV/c muons mc2 () ~ 105 MeV  ( -1) ~ 2 cluster/cm electrons/cluster for 200MeV/c muons gamma-1 gamma-1 Edda Gschwendtner

  5. Helium, E=520V/cm Drift Properties 0 Edda Gschwendtner

  6. He/CH4 mixtures, E=520V/cm Drift Properties I Edda Gschwendtner

  7. Drift Properties II He/CO2 mixtures, E=520V/cm Edda Gschwendtner

  8. Summary • He/CH4 mixtures: with more CH4 • More electrons/cm produced • Less diffusion • Faster drift velocity • take maximum CH4 value still compatible with safety? • He/CO2 mixtures: with more CO2 • More electrons/cm produced • Less diffustion • But slower drift velocity • Sufficiently enough gain with little CO2? In ALICE TPC: Neon based gas  look at that… Edda Gschwendtner

More Related