PHY397K - NUCLEAR PHYSICS - 10 - Department of …cmarkert/home/Teaching_files/...1 PHY397K -...
13
1 PHY397K - NUCLEAR PHYSICS - 10 PHY397K - NUCLEAR PHYSICS Spring 2015, Unique numbers: 57115 RLM 5.116, TTH 12:30 - 2:00 pm Christina Markert Office: RLM: 10.305 Phone: 512 471 8834 Email: [email protected]
Transcript of PHY397K - NUCLEAR PHYSICS - 10 - Department of …cmarkert/home/Teaching_files/...1 PHY397K -...
1
PHY397K - NUCLEAR PHYSICS - 10
PHY397K - NUCLEAR PHYSICS Spring 2015, Unique numbers: 57115 RLM 5.116, TTH 12:30 - 2:00 pm Christina Markert Office: RLM: 10.305 Phone: 512 471 8834 Email: [email protected]
2
NA49 Vertex TPC (sorry this labels are in German on this plots !!!)
electron drift
electron drift
3
Ionization Detectors
4
Proportional counter
Signal is proportional to number of electrons from ionization
5
STAR Experiment
6
End view STAR TPC
STAR TPC
Au+Au √s = 200 GeV Side view STAR TPC
7
Alice Experiment and TPC
8
Alice Experiment and TPC
https://www.youtube.com/watch?feature=player_embedded&v=zEX5qKvFZSs
9
Alice Experiment and TPC
10
Alice Experiment and TPC
Outer radius = 2.8m Inner radius = 0.8m Length = 5 m àAngle : little larger than 45° Pseudo – rapidity (theta =45°) Eta = 0.88
Pseudo -rapidity
Rapidity
Example: pz = 1 GeV/c, p = 2 GeV/c, Pseudo-rapidity = 0.5493 Rapidity pion = 0.5262, rapidity proton = 0.4878
θ
11
Alice Experiment and TPC
Outer radius = 2.8m Inner radius = 0.8m Length = 5 m àAngle : little larger than 45° Pseudo – rapidity (theta =45°) Eta = 0.88
Pseudo -rapidity
Rapidity
Example: pz = 1 GeV/c, p = 2 GeV/c, Pseudo-rapidity = 0.5493 Rapidity pion = 0.5262, rapidity proton = 0.4878
θ
y / η
Rapidity!Pions!
Pseudo-!rapidity!
12
Energy loss in the TPC (ALICE)
- dE/dx ≈ 1/β2 = M2 c2 γ2 / p2 à γβ = p/Mc
( 1/v2 = M2 γ2 / p2 ) velocity dependence
13
Energy loss in the TPC (ALICE)
- dE/dx ≈ 1/β2 = M2 c2 γ2 / p2 à γβ = p/Mc
( 1/v2 = M2 γ2 / p2 ) velocity dependence
