opera experiment and emulsion technique
DESCRIPTION
OPERA experiment and Emulsion technique. Akitaka Ariga [email protected] Nagoya university On behalf of OPERA collaboration Neutrino interaction vertex location method Large area scanning system Vertex location system PEANUT experiment Emulsion spectrometer summary. - PowerPoint PPT PresentationTRANSCRIPT
OPERA experiment and Emulsion technique
Akitaka [email protected]
Nagoya universityOn behalf of OPERA collaboration
1. Neutrino interaction vertex location method2. Large area scanning system
3. Vertex location system4. PEANUT experiment
5. Emulsion spectrometer6. summary
CERN to Gran Sasso, neutrino beam
Gran Sasso 地下研究所
CERN SPS
730km
Vertex locationSampling by Target Tracker planes ( X,Y )
Brick wall
10 c
m
Selected brick
Event as seen by the target tracker
p.h.
Extract selected brick
ECC brick
8 cm
CS
CSVery low bg emulsion
ECCbrick
10cm 2.6 cm
Event as seen by the target tracker
p.h.
Target Tracker
ECC Target tracker
Basic unit of Detector x 200,000
ECCCS
TTCSECC
Large area scan~100cm2
Point Scan~100x100m2
Vertex location procedure
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
emul
sion
emul
sion
Scanback method
neutrino
S-UTS Video
Non-stop tomographic image taking(follow shot method)
pixelHigh speed CMOS
focus
~100 micron
~60micron
Emulsion layer (Stage)
Drive object lens by piezo actuator30~100Hz
Objective lens
Processing speed :
Up to 70cm2/h/board
SUTS Track recognition board
Internal Band width 21Gbyte/s/FPGA
×11
S-UTS data flow.
Raw data
Data Base
150~300MB/s
2~10MB/s
High speed Camera 3,000 frame/s
Front end image processor0 suppression, pixel packing
Track recognition
DAQ
Pipe line processing Noise rejection Vertex reconstruction
2~10MB/s~0.1MB/s
USERs
1.3GB/s
角度精度 : 15 mrad位置精度 : 0.9 micron
10cm
12.5cm
Total ~100,000,000 tracks
Rock mu track from CNGS 2006 run
600micron16
0mic
ron
X Z
Hits on electric detectorsCS view
TTCSECC
Large area scan~100cm2
Point Scan~100x100m2
Vertex location procedure
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
Lead
emul
sion
emul
sion
emul
sion
ScanBack system
How many plates in 1 day?=20bricks * 57 plates = 1140 plates.
Plate Changer Video
ScanBack
OPERA location system has been tested and ready for the run.
600micron
160m
icro
n
ECC 57plate
CS
Rock mu from 2006 CNGS run. Scanback has been finished in 1 hour.
An application of S-UTS : PEANUT
• ECC + Counter Hybrid target
• Same ECC structure as OPERA
• Precision measurement for neutrino interaction.
e/ measurement.• Neutrino cross-section
s.
Full volume scanning by SUTS Read out for Target 2.5kg, 4.8x1019POT at MINOS ND. exp~50 int
ニュートリノ反応点候補
10cm9cm
Plate 1 ~ 20
ニュートリノビーム
pl 57 pl 56 pl 55
30 plates
plate 間の繋ぎ
10cm 9cm
Vertex hunting
Counter independent vertex location
1ry VTX
Side view
e interaction candidate → NC interaction candidate
Proton candidate(dE/dX measurement)
2electron from 1ry vtx
neutrino
Beam view
e-shower
e-shower
e-pa
ir
sho
wer
e-pa
ir
sho
wer
1mm 1mm
PEANUT preliminary
3X0
B = 1.057[T]
Compact spectrometer (30mm) for M-ECCBeam test for 0.5GeV~2GeV pion with B=1.057T
Emul
sion
laye
rA
ir ga
p15m
mEm
ulsi
on la
yer
Air
gap1
5mm
Emul
sion
laye
rC.Fukushima, H.Shibutya, Toho university.
P(GeV/c) S(m)
0.5 79.6
1.0 39.8
2.0 19.89
B
ECC spectrometer
・
e+
30mm
Test exposure at KEK T1 beam line.
+ 0
.5G
eV
+ 1
.0
+ 2
.0R
efer
ence
(B=
0)
- 2
.0
- 1
.0
- 0
.5
The distribution of S (mean, width) is quite consistent with the bending and scattering.
s
em* air em air em 30mm
*em consist of OPERA emulsion with 200micron TAC supporter on both side.
* Proton contamination were rejected by dE/dx measurement
Test module inside
1T compact-permanent magnet
pions
P r
eso
lutio
n1
5.6
%1
5.1
%1
5.3
%
13.
9%
13.
1%
14.
5%
DATA
Momentum resolution with current setup.
p/p ~0.14 + 0.030 x p [GeV/c]
(p/p)MS
(p/p)Pos.Res.total error
p[GeV/c] charge-misID2.0 0.00%5.0 0.00%10.0 0.02%15.0 0.62%20.0 2.72%
Farther improvement can be done by reducing materials (emulsion layer, TAC support) or change length.Technical paper will appear soon. C.Fukushima et.al.
Charge mis-identification probability for Pion.
Calculation assuming position resolution = 1 micron
Summary
• The scanning power and emulsion techniques are in progress.– Large area scanning.– Vertex location system.
• We are ready for CNGS running.
• Wide application of Emulsion detector. e/ ratio, cross-sections measurement.– Emulsion spectrometer.
Mass produced Emulsion FilmProduced by the production line of the photographic color film
Plastic base (200 m)
Surface protection layer
Nuclear Emulsion
(50m)
Nuclear Emulsion
Enables to make direct contact with Lead plate
Cross section
Nuclear Emulsion
(50m)
(1m)
Real-time Image Filtering and Packing ProcessorArrange readout segments
to lines
FIR filtersRing frame buffers
Spatial filter and Pixel Packing
LVDS Camera Interface
LVDS Output Interface
Camera In
スキャン負荷Area to be scanned
Events
/day
Scanning area
cm2/day
CHORUS 1mmx1mm 1000 10
OPERA 1μ 5cmx5cmx4surf 23 2300 total 5100
=250cm2/hOPERA 0μ 10cmx10cmx4surf 7 2800
50mm1mm 100mm
1μevent
0μevent
Required Scanning Power for CS
CHORUS
0.003
0.003
0.1
0.11.2
7.0
4060
200
1000
0.001
0.01
0.1
1
10
100
1000
cm2 /
h
TS(1994) NTS(1996) UTS(1998) SUTS(2006) SUTS(2007- )
Scanning Power Roadmap
1stagefacility
Scanning Power Roadmap
1.5m2/day = 1000cm2/h x 15h
0.000008
0.000048
0.00025
0.00150.003
0.018
0.71.4 2.8
14
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
10
100
MB
yte /
sec
TS(1994) NTS(1996) UTS(1998) SUTS(2006) SUTS(2007- )
1stagefacility
BELLE10MByte/s
LHC 100MByte/s
S-UTS Output Data Speed