T1008 status

T1008 status

W.Baldini for the SuperB-IFR Group

2

R&D for the SuperB Instrumented Flux Return

• Muon Identification E< 5GeV• Superconducting solenoid Flux Return Instrumented

with active material • Plastic scintillator bars readout through WLS fibers

and Silicon Photo-Multipliers (SiPM)• Baseline layout to be tested on beam with a

prototype• TDR to be written in spring…

The IFR Baseline Detection Technique • Magnet Flux Return instrumented to detect Muons and KL

• BaBar-like detector with hexagonal barrel and two encaps

• Plan to re-use BaBar IFR structure, adding iron to improve μ-ID

• Scintillator as active material to cope with higher flux of particles

• Minos-like scintillator bars readout through WLS fibers and Silicon Photo-Multipliers

• 8-9 active layers

Barrel Endcap

μ

4

The Prototype

Active Layers (Pizza Boxes)

• Iron: 60x60x92 cm3, 9 slots for the active layers • up to 9 active layers readout together • 4 Time Readout (TDC-RO) “standard “• 4 Binary Readout (BiRo) “standard”• 4 special modules to study different fibers or SiPM geometry

Iron

Prototype

Active Layer (“pizza box”)

5

Summary of activities

• Installation: March 1-4 • Security walkthrough: March 5, first beam: March 3• Trigger timing and apparatus setting up • Data taking summary:

– 8,6,5 GeV – Cherenkov scan– Muons:

• Selected with Cherenkov (C1) • Selected with downstream scintillators (S3 and S4)

– Pions• Selected with Cherenkov (C1)

– Control triggers • No Cherenkov • Only Electrons (C2) veto

• Still 16 hours of beam (until 6 am)

6

Cherenkov scans

• For us is of fundamental importance to collect clean samples of muons and pions

very important to understand how well the cherenkov tags the particles

scan needed for each beam momentum: 8,6,5 GeV/c

7

Cherenkov pressure scan: 8 GeV (N2)July-11 scan

3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.000

0.01

0.02

0.03

0.04

0.05

0.06

pressure (psi)

muo

n tr

igge

r/be

am

March-12 scan

Muon peak

Pion peak

8

5.00 7.00 9.00 11.00 13.00 15.00 17.000

0.02

0.04

0.06

0.08

0.1

0.12

pressure (psi)

muo

n tr

igge

r / b

eam

Cherenkov pressure scan: 6 GeV (N2) July-11 scan

March-12 scan

9

Cherenkov pressure scan: 5GeV

9 11 13 15 17 19 21 230

5

10

15

20

25

30

35

pressure (PSI)

muo

n tr

igge

r / b

eam

March-12 scan

Event samples…

Detector hit map for a sample of Muons at 8 GeV

time (samples of of 12.5 nsec)

Hit

chan

nel

Event samples…

Detector hit map for a sample of Pions at 8 GeV

time (samples of of 12.5 nsec)

Hit

chan

nel

12

Summarizing…..• We have taken data at 8,6,5, GeV • Now the Cherenkov seems to be more efficient at 6 and 5 GeV

than in October (something happened in the meanwhile?)• 24h running since Friday • Apart from a few interruption at the beginning (March 6-th)

the beam was very stable• We plan to take data until tomorrow morning (8am?) then

move the equipment out of the area