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Welcome to Welcome to ILC GDE Meeting ILC GDE Meeting

&& 9th ACFA ILC Physics and 9th ACFA ILC Physics and

Detector WorkshopDetector Workshop

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Hesheng Chen

Institute of High Energy Physics

Beijing 100049, China

Scientific Activities Scientific Activities

at Institute High Energy Physicsat Institute High Energy Physics

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Institute of High Energy Institute of High Energy PhysicsPhysics

Comprehensive and largest fundamental research center in China

Major research fields :Major research fields :– Particle physicsParticle physics– Accelerator technologies and applications Accelerator technologies and applications – Synchrotron radiation technologies and applicationsSynchrotron radiation technologies and applications1030 employees, ~ 650 physicists and engineers, 400 PhD Students and postdoctors

Established at 1950, and became an independent inEstablished at 1950, and became an independent institute at 1973 . stitute at 1973 .

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Research Divisions Experimental Physics center: BES, BESIII, CMS, Atlas… Particle Astrophysics Center ： cosmic ray, astrophysics,

neutrino physics, particle astrophysics… Theory Division: particle physics, nuclear physics, field th

eory, cosmology… Accelerator Center: BEPC, BEPCII, high power proton a

ccelerator Beijing Synchrotron Radiation Lab. Nuclear Analysis Lab. Free Electron Laser Division Computer and Network Center Center of Hi-Tech R&D

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Bird’s Eye View of Bird’s Eye View of BEPCBEPC

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BEPC constructed in 1984 –1988 with beam energy: 1 – 2.8 GeV– Physics Run ： Luminosity 1031cm-2s-1 @ 1.89GeV, 5 month/year– Synchrotron Radiation Run ： 140mA @ 2.2 GeV, 3 month/year

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Main Physics Results from BESBES Precision measurement of mass: world average value

changed by 3, accuracy improved by factor of 10, and approved lepton universality.

R Measurement at 2-5GeV: R/R 15-20% →6.6%– Higgs mass prediction from SM– g-2 experiment – (Mz

2) -1 : 128.890±0.090 → 128.936 ± 0.046• Systematic study of (2S) and J/ decays.

Resonance X(1835) in with mass and width

are consistent with that of the S-wave resonance X(1860)

indicated by the pp mass threshold enhancement.

'/J

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LHC ExperimentsLHC Experiments

1. CMS – 1/3 of CSC at muon end caps– HV boards for RPC – RPC of barrel muon (Beijing Univ.) – Physics and MC

2. Atlas – Drift Monitor chambers– Physics and MC

3. LCG: Tier 2

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ILC R&D ILC R&D 1. Machine: – design of damp ring – positron source – SC cavity – ……2. Detector – RPC– GEM , TPC,

3. Physics: ITP, Tsinghua Univ. IHEP…

As BEPCII/BESIII go smoothly, more machine and detector people will move to ILC R&D.

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Yangbajing Cosmic Ray Observatory （ a.s.l. 4300m ）

IHEP-INFN RPC China-Japan Air Shower Array

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AMS01 permanent magnet and structure were built at Beijing, and became the first big magnet in space as payload of Discovery June 1998.

• Search for antimatter and dark matter • precision measurement of isotopes

Alpha Magnetic Spectrometer

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AMS02 ECAL: IHEP, LAPP and PISA

Space qualification at Beijing

AMS02 ECAL assembling at IHEP

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Hard X-ray Modulate Telescope Satellitescan sky for point sources

Charged particle shielding

Collimator

Crystals

PMTSupport structure

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BEPC

4w1

Diffuse ScatteringX-ray fluorescence

analysis

Topography

4B9

X-ray DiffractionSmall angle scattering

Photoemission SpectroscPopy

3B1

Lithography

3W1

Middle energy

4W1B

4W1A

4B9B

4B9A3B

1B

3B1A

3W1A

3W1B

4 wigglers and 13 beam lines. > 300 exp./year from > 100 institutions

Beijing Synchrotron Radiation Facility

140mA@2.2GeV

1W1A

XAFS1W1B

High-pressure diffraction

LIGA

VUV

Macromolecular

3B3

1w1

4w2

3B3

Soft X-ray Optics

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Structure of third type of light–harvester protein. The structure diffraction data taken at BSRF.

More than 40 Protein structures obtained from BSRF

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2. BEPCII: High Lumi. Double–ring Collider

Build new ring inside existing ring . Two half new rings and two half old rings cross at two IR’s, forming a double ring collider.

BEPCII

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BEPC II Double ring Design• In the existing BEPC tunnel, add another ring, cross over at south a

nd north points, two equal rings for electrons and positrons. Advanced double-ring collision technology.

• 93 bunches ， total current > 0.9A in each ring. • Collision spacing ： 8 ns.• In south, collision with large cross-angle （ ±11 mr ） .• Calculated luminosity ： 1033 cm-2 s-1 @ 3.78GeV of C.M. energy.• Linac upgrade: e+ 50mA/min. , Full energy injection up to 1.89GeV • In north cross point, connecting SR beam between two outer rings, in south cross point, use dipole magnet to bend the beam back to out

er ring.• SR run ： 250mA @ 2.5 GeV.• Major detector upgrade ： BES III.

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1029

1030

1031

1032

1033

1034

1035

1036

1037

1 10 100 1000

GLC

ADONE

VEPP2000

KEK B and PEP II

KEK BPEP II

CESR

DAFNE

DAFNE2

BEPCIII

CESRc

Ecm

(GeV)

L (cm-2 sec-1)

VEPP2M

LEP

TRISTANPETRA

VEPP4MDORIS

SPEARBEPC

COLLIDERS

FACTORIES

SUPER FACTORIES

ee++-e-e-- Colliders: Past, Present and Future Colliders: Past, Present and Future

C. Biscari, Workshop on e+e- in 1-2 GeV Range, September 10-13, 2003, Italy

L (cm-2 s-1)

E (GeV)

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Physics at BEPCII/BESIII• Precision measurement of CKM matrix elements

• Precision test of Standard Model

• QCD and hadron production

• Light hadron spectroscopy

• Charmonium physics

• Search for new physics/new particles

Physics

Channel

Energy

(GeV)

Luminosity

(1033 cm–2s –1)

Events/year

J/ 3.097 0.6 1.0×1010

3.67 1.0 1.2×107

’ 3.686 1.0 3.0 ×109

D* 3.77 1.0 2.5×107

Ds 4.03 0.6 1.0×106

Ds 4.14 0.6 2.0×106

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Light Hadron spectroscopy• Baryon spectroscopy• Charmonium spectroscopy• Glueball searches• Search for non-qqbar states

1010 J/ events is probably

enough to pin down most

of problems of light hadron

spectroscopy

Spectrum of glueballs from LQCD

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Precision measurement of CKM — Branching rations of charm mesons

• Vcd /Vcs: Leptonic and semi-leptonic decays

• Vcb: Hadronic decays

• Vtd /Vts: fD and fDs from Leptonic decays

• Vub: Form factors of semi-leptonic decays

• Unitarity Test of CKM matrixCurrent BESIII

Vub 25% 5%

Vcd 7% 1%

Vcs 16% 1%

Vcb 5% 3%

Vtd 36% 5%

Vts 39% 5%

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QCD and Hadron production• R-value measurement• pQCD and non-pQCD boundary

• Measurement of s at low energies

• Hadron production at J/’, and continuum • Multiplicity and other topology of hadron event • BEC, correlations, form factors, resonance, etc.

Error on R (5)had (MZ

2)

6% 0.02761 ±0.00036

3% 0.02761 ±0.00030

2% 0.02761 ±0.00029

Errors on R will be reduced to 2% from currently 6%

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Stage #1: Linac upgrade reached designed specifications

RF Gallery

Linac Tunnel

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Performance of the BEPCII Linac

note： *） The values for 1.89 GeV is extrapolated from those of 1.30 GeV， should be measured when the energy is at 1.89 GeV.

parameters Design (BEPC) Achieved

Beam energy （ GeV ） 1.89 (1.55) 1.89 (e-); 1.89 (e+)

current (mA) e+ 37 (4) > 63

e- 500 (50) > 800

Repetition rate (Hz) 50 (12.5) 50

Emittance (mmmrad ）

e+ 0.40 (1.70) 0.40±0.05

e- 0.10 (0.58) 0.09±0.03

Energy spread（）

e+ 0.5 (0.8) 0.45 @ 1.89 GeV

e- 0.5 (0.8) 0.55 @ 1.89 GeV *)

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Stage #2: Storage Ring upgradereached Goal

1. Jan.- June 2005 SR running √

2. Production of Double ring components Finished√

3. Remove old ring√, install Double ring√

4. BESIII components√

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Storage Ring installation finished

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SC Quads at Interaction Region

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Beam was stored successfully in the storage ring Nov. 18. 2006

BSRF opened to light source users Dec. 25 2006

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BESIII Detector — Adapt to high event rate : 1033cm-2 s-1 and bunch spacing 8ns

— Reduce sys. errors for high statistics: photon measurement, PID…

— Increase acceptance ， and give space for SC quads

Be beam pipe

SC magnet, 1TMagnet yoke

MDC, 120 m

CsI(Tl) calorimeter, 2.5 %@1 GeV

TOF, 90ps

RPC

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Main Drift Chamber• Small cell • 7000 Signal wires: 25m gold-plated tungsten • 22000 Field wires: 110 m gold-plated Aluminum • Gas: He + C3H8 (60/40)• Momentum resolution@1GeV: • dE/dX resolution: ~ 6%.

%37.0%32.0 t

P

Pt

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Current status of MDC• Wiring completed with good quality• Inner chamber and outer chamber assembled• Gas leakage test finished• Cosmic-ray test started

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Installation of HV Cables & Preamplifiers

33Cosmic ray test

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CsI(Tl) crystal calorimeter• Design goals:

– Energy: 2.5% @ 1GeV

– Spatial: 0.6cm @ 1GeV

• Crystals:– Barrel: 5280 w: 21564 kg– Endcaps: 960 w: 4051 kg– Total: 6240 w: 25.6 T

2 Photodiode+2 Preamp+ (1 Amplifier)Photodiode(PD): Hamamatsu S2744-08 (1cm x 2cm)Preamplifier noise: <1100 e (~220kev)Shaping time of amplifier: 1μs

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Cosmic rays test for Detector cells 5263 cells of barrel

Relative Light-output uniformity

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Support Structure of EMC Barrel

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Barrel EMC: view from inside

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PID: Time-Of-Flight counters• To measure the flight time of particles in order to identify them: m=P/(L/t)

Barrel TOF Endcap T

OF

High quality plastic scintillator: 2.4 m long, 5cm thick

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Test beam at IHEP: for various types of scintillators, thickness, wrapping materials, …

protons electrons104±11ps 70±2ps 94±3ps

pions

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system : RPC• 9 layer, 2000 m2

• Special bakelite plate w/o lineseed oil • 4cm strips, 10000 channels• Noise less than 0.1 Hz/cm2

• Good candidate for ILC HCAL and muon chamber

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Super-conducting magnet• Al stabilized NbTi/Cu conductor from Hitachi

• 1.0 T, <5% non-uniformity

• 921 turns, 3150A @4.5K

• R = 1.475 m, L=3.52m, cold mass 3.6t

• Thickness: 1.92 X0

• Inner-winding method

Esti mati on of the vol tage by quench

0. 050. 0

100. 0150. 0200. 0250. 0300. 0350. 0

1 2 4 8 10 20 30Quench Length (m)

Coil

Voltage (

mV

)

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BESIII Magnet ProgressThermal

insulation assembl

y

transportation

wiring

installation

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Field reached 1 teslaField reached 1 tesla

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Schedule• May – Oct. 04. : √

– Linac upgrade – BESII detector removing– Transformer system 630KW →1600KW

• Nov. 04 – June 05: Tuning and SR running √• July 05 – Oct. 06: Long shutdown

– Remove existing ring √– Upgrade infrastructure √– Install two rings:√

• Nov. 06 - Sep. 07: Tuning of machine + SR running • Oct. 07: BESIII detector moved into beam line• Nov. 07 : Starting machine-detector tuning. • Physics run by end of 2007

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Medium Term PlanMedium Term Plan• Charm physics @ BEPCII • Modulated hard X-ray telescope satellite• Neutrino experiments:

– Daya Bay Reactor neutrino to measure sin2213 – National underground Lab.– Cosmic ray Tau neutrino telescope– Very LBL oscillation experiment: J-Prac→ Beijing

• Yangbajing Cosmic ray Observatory• LHC exp. And ILC • High power proton Accelerator:

– Chinese Spallation Neutron Source 100KW→200 KW– Accelerator Driven Subcritical system

• Hard X-ray FEL• Convert BEPC into dedicated SR source after BEPCII fi

nished physics runningIHEP extents research fields, to protein structure, nano-sci

ence, material science… → Multiple Sciences Center

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Parameterization of neutrino mixing

6 fundamental parameters in neutrino physics ： Known ： | m2

32|,sin2232 ， m221,sin2221

Unknown: sin22 ， , sign of m232

Exp. ： reactor VLBL oscillation

Daya Bay Reactor J-Parc → Beijing

Neutrino mixing parameters

U 1 0 0

0 cos23 sin23

0 sin23 cos23

cos13 0 e i sin13

0 1 0

e i sin13 0 cos13

cos12 sin12 0

sin12 cos12 0

0 0 1

e

Ue1 Ue2 Ue3U1 U2 U3

U1 U2 U 3

1

2

3

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3535大亚湾与岭澳核电站大亚湾与岭澳核电站

大亚湾核电站大亚湾核电站 岭澳核电站岭澳核电站

Daya bay reactor neutrino experiment with sensitivity of 0.01 to sin22

Daya bay reactor neutrino experiment with sensitivity of 0.01 to sin22

Daya Bay NPPDaya Bay NPP LingAo NPPLingAo NPP

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CSNS layout

Linac: H-beam, RFQ, 81 MeV (DTL) →230 MeV (SCL)

Rapid-cycling synchrotron: 1.6 GeV at 25 Hz

Chinese Spallation Neutron Source

CSNS primary parameters

Phase I Phase II Phase II’

Beam power on target [kW] 120 240 500

Proton energy on target [GeV] 1.6 1.6 1.6

Average beam current [A] 76 151 315

Pulse repetition rate [Hz] 25 25 25

Protons per pulse [1013] 1.9 3.8 7.8

Linac energy [MeV] 81 134 230

Linac type DTL DTL DTL+SCL

Target number 1 1 1 or 2

Target material Tungsten

Moderators H2O (300K), CH4(100K), H2(20K)

Number of spectrometers 7 18 >18

CSNS ParametersCSNS Parameters

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Thanks !