1. Progress report since june 2010
muon subgroup meeting
Progress report since june 2010
occupancy in the first layers of the muon system – preliminary results
prototype test preparation
MP Bussa
PANDA wwek - KVI september 2010

2. PANDA wwek - KVI september 2010
Simulation Layout
MDT
layer 0
EMC support
Additional space required for EMC support in june 2010
Il supporto è il disco giallo
MP Bussa
PANDA wwek - KVI september 2010 2

3. PANDA wwek - KVI september 2010
Questions opened by space requirements
Is the (elm) background manageable at the MDT layer 0?
How much the layer 0 improves the
PID?
Layer 0 is the double MDT layer just before the
iron yoke and the Endcap (2x3 cm width)
I 3 cm di alluminio sono stati introdotti per simulare la struttura di supporto del calorimetro nella direzione forward (guardare la mail inviata con la presentazione). Il disegno del supporto che mi ha dato Stefano è molto semplice: per avere una prima approssimazione, in attesa dei disegni ufficiali, ha una forma circolare come anche il buco lungo la linea di fascio.
I momenti del fascio sono rispettivamente per la formazione di J/psi e per il Drell-Yan
I tagli in momento potrebbero ridurre l’occupancy di parecchio
MP Bussa
PANDA wwek - KVI september 2010 3

4. PANDA wwek - KVI september 2010
The Simulation Layout
DPM generator
104 events produced
P beam 4 and 15 GeV/c
elastic + inelastic reactions
3 cm Al at the Endcap to simulate EMC support
No diffractive events
No cut on particle momenta
Occupancy contribution by different particles
Layer 0 and layer 1 divided in sense cells 1x1 cm2
Single cell multiplicity evaluated per each event
No scaling to realistic event rate
MP Bussa
PANDA wwek - KVI september 2010

5. Occupancy per particle flavor @15 GeV/c
MP Bussa
PANDA wwek - KVI september 2010

6. Occupancy per particle flavor @15 GeV/c
Barrel
End Cap e
1153
9884 p
349
4960
321
2001 m 44
428 k 5
(104 events)
Protons from elastic events & pion induced reactions
Protons do not scale with pions
MP Bussa
PANDA wwek - KVI september 2010

7. Occupancy at layer 0 (104 events) for different pbeam
Barrel
EndCap
Total 4
GeV/c
1175
8697
9862
15 GeV/c
1687
15718
17365
MP Bussa
PANDA wwek - KVI september 2010

8. Integrated occupancy for the 8 barrel sectors
@4 GeV/c
Counts per MDT (1 cm)
@15 GeV/c
Counts per strip (1 cm)
MP Bussa
PANDA wwek - KVI september 2010

9. Integrated occupancy for the End Cap
@4 GeV/c
Counts per MDT (1 cm)
@15 GeV/c
Counts per strip (1 cm)
MP Bussa
PANDA wwek - KVI september 2010

10. PANDA wwek - KVI september 2010
Conclusions
Study on mu-det occupancy started
Hit multiplicity per event seems under control
Momentum cut has to be included
Further studies for EndCap are needed with full DPM generator
Crosscheck with warnings by Pythia generator
MP Bussa
PANDA wwek - KVI september 2010

11. PANDA wwek - KVI september 2010
Dubna report
The RS Prototype mechanical structure is close to final welding (absorber plates with support frames)
The fiberglass boards for production of strip boards (24 pieces, 1 m by 1 m size) are obtained.
Cutting of strips is in preparation
MP Bussa
PANDA wwek - KVI september 2010

12. Dubna status report on electronic units production
PCBs (cards/%)
assembly/
welding
tests
ADB-32
72/100%
ready
A-32
80/100%
4/5%
ASum-96
30/100%
6/20%
QTC-16
3/100%
2/66%
A2DB-32
prepaid
MP Bussa
PANDA wwek - KVI september 2010

13. PANDA wwek - KVI september 2010
Dubna software report
The work is finalized to studies of dimuon acceptance
10 M events for DY and J/psi muon pairs generated in Pythia
Acceptance studies with PANDAroot in progress
Solenoid material included in the frame of magnet yoke for studies on dimuon acceptance
MP Bussa
PANDA wwek - KVI september 2010