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

FNAL Main Injector Particle Production

Experiment Hall

Multi Wire Proportional Chamber (MWPC)

• 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

- Magic Gas & Ionization- Negative applied voltage- Electric Field- Field lines

• 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

11 Stesalit Frames

Preamplifiers

Iron Frame

Mylar Cover

• Gas Mixture of MWPCs

- Noble gases – Low electric field

- The suitable gas- Argon- Polyatomic gases

- 80 % Argon and 20 % CO2

• RMH System

RMH Module Crate Encoder Control Unit

-CAMAC Package

Branch Receivers

System Encoder

Interface

- A sample of preamplifier

32 wire channels

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

Physics Potential of the FNAL MIPP experiment

E907

- 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

Yusuf Oguzhan Gunaydin

Thank you for

your patience