1. MWPC (Multiwire proportional chamber)
Part-III
MWPC
(Multiwire proportional chamber)

2. First design of MWPC

3. More sophisticated design, later developed

4. Why segmented electrodes?

16. Is diffusion of primary electrons affecting the position resolution?

17. Actually inside the MWPC not much, because signals from
Simulation
Actually inside the MWPC not
much, because signals from
several electrodes are taken
into account

18. Vacuum, gas, liquid, solid-state
The principle of segmented electrodes and induced signal is used in ALL position sensitive detectors:
Vacuum,
gas,
liquid,
solid-state

19. 3-D sensitive MWPV-TPC
Due to the long drift region, the effect of the diffusion should be considered seriously

20. Example-ALICE TPC

22. MWPC vs. bubble chambers
Dimensions/geometry
Event selection (trigger)
Rate capability ~10/sec , LHC ~109/sec
Electronics readout digital files vs. pictures
Data processing computer vs. visual inspection