Belle II Constructionand Schedule

ARC 2013.03.04
Y.Sakai1Physics Goal of SuperKEKB
Baryogenesis

SM is incomplete

Neutrino mass

Dark matter

Grandunification

Mass hierarchy

There must be New Physics @ TeV scale !!
But

Supersymmetry ?
ψ ↔ ψ%

Extradimension ?
D>4Co
H, or what?

Direct Search
LHCFlavor physics : key to identify the theory
B

DK

ν

Super B factoryτµ…

2

Belle II Detector
KL and muon detector:

Resistive Plate Counter (barrel outer layers)
Scintillator + WLSF + MPPC (end‐caps, inner 2 barrel layers)

EM Calorimeter:CsI(Tl), waveform sampling (barrel)
Pure CsI + waveform sampling (end‐caps)

Particle Identiﬁcationelectron (7GeV)

Time‐of‐Propagation counter (barrel)
Prox. focusing Aerogel RICH (fwd)

Beryllium beam pipe
2cm diameter

Vertex Detector

2 layers DEPFET + 4 layers DSSD

positron (4GeV)

Central Drift ChamberHe(50%):C2H6(50%), Small cells, longlever arm, fast electronics
3Issues on Belle II UpgradeHigh Background (×10-20)
Radiation Hardness

Fine Granularity

Occupancy

High Speed Readout

Pile-up NoiseHigh Event Rates ( >×10)

New Technology

Improved Performance

Pixel

SVD

Vertex Reconstruction

CDC Inner part

PID, Neutral particles

PID
ECL

Hermeticity

KLM endcap/barrel
DAQVertex detectors PXD/SVD
Beam Pipe
DEPFET
Layer 1Layer 2
DSSD
Layer 3Layer 4Layer 5Layer 6r = 10mmr = 14mm
r = 22mmr = 38mmr = 80mmr = 105mmr = 135mm

5

PXD: Production
Started Metal layer test

Poly-silicon layer(69％)>1 month earlier

Electric test module

2 years of prodiction
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PXD: Gated Operation

Normal operation: ~20% dead time
Noisy bunches fill the DEPFET matrix with background hits
(twice in 20µs integration time)-> hit overlay, pattern recognition impossible-> saturates bandwidth

Gated operation → ~1-2% dead time
Positive pulse on clear → blind
Tested → verified to work !

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SVD progress
MechanicalLayer 3 design: finished
Ladder mounts are designed
Rev.0 3D CAD completed
DESY : thermal mockup

Rev.0 3D CAD

Precision mockup: will be built at KEK

Ladder Assembly
KIPMU & Tokyo joined : L6
Indian group also workat KIPMU : L4
Vienna and Merbourne: L5,38CDC
longer lever arm
improve resolution of momentum and dE/dx

Belle

Belle II

KEK, NTU, OCU,Korea, RCNP

Belle

Belle II

radius of inner most sense wire

88

168

radius of outer most sense wire

863

1111.4

Number of layers

50

56

Number of total sense wire

8400

14336

Gas

He:C2H6

He:C2H6

sense/field wireW(Φ30μm)/Al(Φ120μm)

W(Φ30μm)/
Al(Φ120μm)

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CDC
CDC
Structure

End-plates : drilling finished
KEK, NTU, OCU,
Korea, RCNP

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CDC Construction
Outer CFRP cylinder

Clean Room iat B4 in Fuji

Al support ring isassembled smoothly

inside of cylinder 100um Al
2012/10/1

Main room
11CDC

Nov. 30 VXD dummy loading test

2012.11.21
Delivered to Fuji Exp. hall

Wire Stringing started
Jan. 31, 2013
Dec. 18 1st wire(2012.12.18)

3508 wires (~7%) completed by Jan. 31, 2013
All 56k wires to be completed in ~1 year
Progress with improved preceduresFirstwire

New year holidays

Electronics also in progress: all ASIC chips checked at NTU

12Particle ID

Endcap PID:
Aerogel RICH(ARICH)
200mm

Barrel PID:
Time of Propagation Counter (TOP)

Quartz radiatornhotovpenko
Cher

Aerogel radiatorn~1.05

Aerogel radiator

Hamamatsu HAPD + readout

200

Nagoya, KEK, Ljubljana, Hawaii, Cincinnati

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PID: TOP counter• Quartz radiator– 2.6mL x 45cmW x 2cmT
– Excellent surface accuracy• MCP‐PMT– Hamamatsu 16ch MCP‐PMT• Good TTS (<35ps) & enoughlifetime• Multialkali photo‐cathode SBATOP

TOF〜1.2m

MCP‐PMT14

TOP: Belle II DOE Reviews

 Skip CD-3B and do CD-2/3 in Aug-2013 : Full system test results- concentrate the effort ?
 need to re-evaluate Quartz-bar production/processing timeline: crucial
15

TOP: Preparation of LEPS Beam Test
Performed2-9, Oct. 2012
(analysis inprogress)

16TOP: Cosmic Ray Test
at Fuji Exp. Hall

17

E-PID: Aerogel RICH
Position-sensitive photon sensor+ Readout Electronics

Hybrid Avalanche
Photo-Detector(HAPD)• Dveloped with Hamamatsu– 144 channel, 5mm×5mm/pixel
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ARICH: HAPD radiation test
Neutron irradiation at J-PARC

Photon irradiation at J-PARC

Further tests are planned for (possible) feedback

19

ARICH: Readout ASIC
SA01(2007) → SA02(2009) →SA03(2011)

Prototype FE board
FE with SA03
→ Beam Test planned
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ARICH: Aerogel Tile
Conventional method

Pin-Drying method
n=1.065
T.L = 49mm
20mmt

21

ARICH: HAPD Config.
Re-optimization

1/6 mockup
formechanicaldesign~1 photon loss
~ -0.5% KID effic.
~29% lighter
Radiation tolerant
Cost effective22

ECL: Waveform Sampling
Shaper DST

New Electronics Modules

Collector

New version• All main functions: Tested→ Production

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Progress of EKLM production

MOU• NRC Kurchatov institute – KEK (June 25, 2012)
Prof. M.V. Kovalchuk – Prof. A. Suzuki• ITEP – KEK+Belle II (ready to sign now)
Prof. Yury F. Kozlov – Prof. M. Yamauchi

Mass production
fibers ready to beglued
gel pump

Fiber processing: cut; milling two ends; gluing toconnector; mirroring far end: (started August, 20)

Fiber gluing to strip:
filling the strip groove with
optical gel from the top
insert fiber; cover groove:(started September, 3)

Segment gluing:
Use 5 tables; press with
air-bag. 5 segments = 75
strips/day by 2 persons(started September, 13)

speed control(gel feed&moving)
movingcarriage

2012/10/1

gluing tables

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Delivery & Installation
First delivery !
1‐Jan‐2013 from Russia
28 boxes(290 x 14 x 62 cm3, 120kg)
1/4 of whole~30 Boxes in April, July, Oct.
→ Assembly, Test → Installation
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2012/10/1

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Belle Rotation

28

Belle Rotation in Progress
2012.11.10

Roll in for Rotation（2013.2.7）
Detector Rotation2013.1.23

Installed modifiedcarriers(almost done)29Commissioning Scenario~5 mo.
Vacuumscrabing~4 mo.
Low βBkg tune

First target luminosity
1 x 1034 cm-2s-1

Baseline

Scenario 1~5 mo.
Vacuumscrabing~3 mo.
“Low β”Bkg ?

~4 mo.
Low β
Bkg tuneFirst target luminosity
1 x 1034 cm-2s-1

Backup

Scenario 2
2012/10/130

Construction Schedule[JFY2012]• Belle rotaRon: ~Mar. 2013

JFY: April 1 – March 31[JFY2013]• KLM installaRon: ~Dec. 2013 (Mar. 2014?)[JFY2014]• ECL barrel electronics installaRon: Feb.– Jun. 2014
• ECL endcap electronics installaRon: Dec. 2014– Mar. 2015
[JFY2015]• ARICH installaRon: Feb.–May 2015
• Endcap ready for installa1on: summer 2015
• TOP installaRon: Mar.–Apr. 2015
• CDC installaRon: May–Jun. 2015
• SVD/PXD ready at KEK: Aug. 2015
• VXD integra1on, ready for installa1on: autumn 2015
• Belle II DAQ integraRon, commissioning, …
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APossible
BEASTII
Strategy
Modular design, where we can easily add/remove sub detectors as required• Perhaps grouped into Inner BEAST, Outer BEAST• Three conﬁguraRon: T0, T1, T2
All scenario

Scenario 2

Scenario 1

BEASTII‐T0

BEASTII‐T1

BEASTII‐T2

w/o QCS, w/osolenoid

w/ QCS, w/osoldenoid

w/QCS, w/solenoid ,No SVD, PXD

ECL shielding

NNN

Diodes & beamabort

YY

Y

Micro‐TPCsYY

Y, in dock

BGONY?

CDC prototype

NYNSVD, PXD
ladders &monitors

NYYDiamonds

YYY

Outer Beast

Inner Beast For BEASTII_T2, place some sub system in PXD DOCK space Keep up development of all BEAST sub systems.
8/28/2012

BEAST II MeeRng

32

Summary
 Most of the design has been finalized Production of components in progress
Mostly on schedule Baseline Commissioning scenario is settled
Installation schedule
discussion for fall back option
 Crucial item for schedule in Belle II:
TOP quartz bar procurement, DOE review
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Belle II Detector (vs Belle)

SVD: 4 DSSD lyrs  2 DEPFET + 4 DSSD lyrs
CDC: small cell, long lever arm
ACC+TOF  TOP+A‐RICH
ECL: waveform sampling (+pure CsI end‐caps)
KLM: RPC  Scintil.+MPPC(end‐caps+barel 2lr)

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Belle II Collaboration

International Collaboration
20 countries, 70 institutes, ~450 collaborators
35

DAQ & Trigger

Larger data size than LHC !

Belle II Link Test done
CDC

SVD

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Belle II Software
Belle-IHEP

Belle II computing

Belle-Krakow

RMS

DIRAC Software Layer

NeCTARWMS

DMS

Logging

Slave

Security log.

gLite
RMS

WMS

MasterDMS

Belle-KEKIFJ
CYFRONET

Accounting

DESY

WMS

Monitoring

FTS
GridKa1 weekSlave
KEK

Proxy mgrOSG

RMS

KIT
DMS

DMS

Configuration Slave
RMS

Cloud

TTU
SIGNET

WMS

Belle-PNNL

FNAL
KISTI

VT
Nebraska

Large MC data
1st Data Challenge
Need to repeat
tests till data taking
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Necessity:2000

Gain

ThresholdGreen : Good
Red : BadEnergy Frontier vs Flavor Physics
Direct Production by High Energy Coll.

p

Virtual Production via Quantum Eff.

~qpb~g ~ ~ ~q χ ν_lq q

Tunnel effect

Energy Frontier
Diagonal terms(m ) =
2q% ijm112 m122 m132
221231~χ222232223233mmmmmmsγ
Luminosity
Frontier

Off-diagonal terms
Higher Energy Scale
Can be searched(even if LHC finds
no New Physics)
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New Physics Prospects
Complemantarity
Super B factory
LHCb
K experiments
theory uncertainty
matches the expectedexp. precision
theory uncertainty will
match the expectedexp. precision withexpected progress inLQCD
G. Isidori et al.,Ann.Rev.Nucl.Part.Sci. 60, 355 (2010)

B(B →Xsγ)
B(B →Xdγ)S(B →ργ)B(τ →µγ)
B(B+ →Dτν)
B(Bs →γγ)
sin2θW @ Υ(4S)

6%Super-B
20%Super-B
0.15
Super-B
3 ·10-9 Super-B (90% U.L.)
3%
Super-B
0.25 ·10-6 Super-B (5 ab-1)
3 ·10-4 Super-B

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Identification of NP typeb)
te tanodera ge tanb)m(ArRlamSUGSUGRA ( T with nR
Um
SY G ive SUSYUS)t
SU(5Effec exchangeton ensionsivar
KK g extra dim nsionsrgeimes in la al extra d ensions
niosrmimredefva
itirlxt
UnSprsal e
Univeitynitar
Bd u violation sPcayC
B dedent
alsepen
Raredsignree
TimOt h“DNA chip ofNew Physics”+ LHC,…

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