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IOWA MULTI WIRE PROPORTIONAL CHAMBER (MWPC) and
PHYSICS POTENTIAL OF THE FERMILAB EXPERIMENT E907 (MIPP)
Yusuf Oguzhan GUNAYDIN
The University of Iowa
Department of Physics & Astronomy
15 July 2004
• Operating Principles - Two Cathode planes sandwich anode wire plane
- l = (3 or 4) x s
x
y
s
l
Cathode Plane
Cathode Plane
Anode Wires
• Iowa Multi Wire Proportional Chambers in Fermilab Experiment E907
- Two Iowa MWPCs each side of the RICH
- 2x2 m2
BC1 BC2 BC3
Beam Ckov1 Beam Ckov2
TPC
Joly
Green
Giant
DC1 DC2DC3 DC4
DIFFCKOV
ROSIE
RICH
DC6 (MWPC)DC5 (MWPC)
EMCAL
HCALBeam
TOF
• Anode Wire Planes
- X vertically
- Y horizontally
- U and V slanted ±28.070
X Plane
U Plane
V Plane
Y Plane
• Gas Mixture of MWPCs
- Noble gases – Low electric field
- The suitable gas- Argon- Polyatomic gases
- 80 % Argon and 20 % CO2
MWPC
Additional Crates
RMH Crate 1
RMH Crate 2
Regular CAMAC Crate
RMH Modules
RMH Modules
RMH Cables
Branch Receiver
System Encoder
Interface
Control UnitCrate Encoder
Preamplifiers
Branch Terminator
RMH System Layout-1
Branch Receivers
System Encoder
Interface
RMH System Layout-2
RMH Modules
RMH Modules
RMH Modules
RMH Modules
Crate encoder
Control Unit
• Efficiency of MWPC - The number of electron-ion pairs . The width of the gap
. The pressure of the gas
. The amount of electronegative gas
. The dE/dx of the fill gas
. The threshold set on the electronics
. The applied high voltage
. Gate width on the read out
Applied voltage is 2600V
Some preamp slots are loosen
Incorrect wire mapping
Correct wire mapping is in the Appendix
- 120 Gev Main Injector Primary protons
- Secondary beams of л±, K±, p± particles
- TPC can measure momenta of all particles
- With ToF, DIFF CHOV, and RICH, MIPP can analyze the charged particle
- Some limited neutrons and photons can be measured
- MIPP supplies high statistics
• Physics Interest - Particle physics
- Nuclear physics
- Service measurements
BC1 BC2 BC3
Beam Ckov1 Beam Ckov2
TPC
Joly
Green
Giant
DC1 DC2DC3 DC4
DIFFCKOV
ROSIE
RICH
DC6 (MWPC)DC5 (MWPC)
EMCAL
HCALBeam
TOF
• Particle Physics - Unbiased high statistics data
- Non-perturbative QCD hadron dynamics
- Scaling laws of particles production
- Investigating light meson spectroscopy
. Pentaquarks
. Glueballs
• Nuclear Physics
- Investigation strangeness production
- Nuclear scaling
- propagation of flavor through nuclei
• Service Measurement - Atmospheric neutrinos
- Improving shower model In MARS, Geant4
- Making measurements to control the near/far systematic
• Exclusive Reactions (Final state’s ides are known)
- Angular distributions
- Correlation
- Exchanged system
0
Strangeness production
StrangenessandBaryon number production
Chargeexchangeand resonanceproduction
Diffaction,strangeness production
DiffractiveDissociation,Pomero
p
p pp
p
p p pp
p p pp
0
ns
Classicρexchangep n
Some Exclusive Reactions