1. Mashines&Detectors at Budker INP PhoPSi workshop, Beijing
Novosibirsk, Russia
16/10/2009
PhoPSi workshop, Beijing

2. Academician Gersh Budker
Budker INP is the Research Center
of the Russian Academy of Sciences.
Total staff
Physicists (176 are under 40 year )
The Institute of Nuclear Physics (Novosibirsk, Russia) was founded in 1958 on the base of the headed by academician Gersh Budker Laboratory for new acceleration methods of the Institute of Atomic Energy (Moscow) headed at that time by academician Igor Kurchatov.
Academician Gersh Budker
( )

3. Budker Institute of Nuclear Physics Research activity:
Physics at Electron-Positron Colliders
Physics of Accelerators
Plasma Physics
Synchrotron Radiation Research
Accelerators-Recuperators and Powerful Free Electron Lasers
Electron Accelerators for Industry
Accelerators & Detectors for Medicine and Security
Theoretical Physics
Collaborations:
-participation in physics experiments and accelerator physics (CERN, KEK, SLAC, BNL, IHEP, PSI, Dubna… )
-development and supply of the unique scientific equipment

4. Budker Institute of Nuclear Physics
Workshop
Workshop is very important:
Flexible for fabrication of unique equipment for
research at BINP
Fabrication of equipment for other lab’s including
small serial production (additional money for our
research!)
Wide Product Groups (magnets for accelerators,
SC wigglers and undulators, vacuum
components, electron accelerator for industry and
etc…..)
(1000 employers)

5. Mashines&Detectors at Budker INP
A few generations of the colliders and detectors
Collider E, Gev Detectors Operation
VEP-1 (e-e-) detectors
VEPP detectors
VEPP detectors
(buster, SR, Nucl. Phys)
VEPP OLYA, MD
VEPP-2M OLYA, ND, CMD
SND, CMD-2
VEPP-4M KEDR
VEPP SND, CMD
Tau-Charm ?

6. VEPP-2M Collider Complex
operated ;
Lmax=4x1030cm–2sec–1 at E0=510 MeV; Total integrated luminosity 80 pb–1.
Main results:
- Development of the resonant depolarization technique for precise measurements of
particles masses (from 1975)
- Detailed study of K, , , and - mesons (precise measurements of parameters, rare
decays and etc)
Data analysis is not completed yet

7. Results of e+e– annihilation cross section measurements by SND and CMD-2 detectors at VEPP-2M
These measurements are very important for calculation of the hadronic
vacuum polarization contribution to g-2 of muon and 

8. VEPP-2000 Collider Status: in operation since 2009!
VEPP-2000 Collider Status: in operation since 2009
Round beams (beam-beam effects suppressed), 2E=2000 MeV
CMD-3
SND
injection
13 T solenoids
L=1x1031 cm-2 c-1 at 2E=1.0 ГэВ,
I־I+ =45x35 mA² , ΔƲ=0.10 !

9. Main parameters of VEPP-2000
Circumference
24.38 м
Revolution time
82 ns
Beam current
200 mA
Beam length
3.3 cm
Energy spread
6.4×10-4
1.0 GeV
1031 cm-2s-1
2.0 GeV
1032 cm-2s-1

10. VEPP-2000
Sept 2009

11. Physics at VEPP-2000 Study of hadronic cross sections
e+e– →2h, 3h, 4h …, h= ,K,,…
Precision measurement of
R=(e+e– → hadrons)/ (e+e–→+–)
Study of light vector mesons excitations: ’, ’’, ’, ’,..
CVC testing by comparison of the energy dependence of e+e– → hadr. (I=1) cross sections with spectral functions in t -decays
Measurement of the nucleons electromagnetic form factors and search for NN- resonances
Study of e+e– -annihilation into hadrons at low energy by radiative return (ISR)
Two-photon physics
High order OED processes

12. SND for VEPP-2000 status: ready for data tacking
1 – beam pipe, 2 – tracking system, 3 – aerogel, 4 – NaI(Tl) crystals, 5 – phototriodes, 6 – muon absorber, 7–9 – muon detector, 10 – focusing solenoid.
Upgrade for VEPP-2000:
Cherenkov counter, n=1.13:
e/p separation at E<450 MeV,
p/K separation at E<1 GeV,
New drift chamber: better tracking

13. SND particle identification system
e/π, p/K separation; principle – aerogel threshold Cherenkov counter with wavelength shifter and microchannel plate PMT
1 – MCP PMT; 2 – aerogel; 3 – WLS
The PID system design
Amplitude spectrum for cosmic muons
Aerogel refraction index n=1,13
Aerogel thickness: 31 mm
Reflector – Teflon, R~98%
Shape: cylindrical. Rin=105mm, Rout=141 mm
3 segments, 3 counters each
Solid angle coverage: ~60% от 4p
Thickness: 0.09 X0

14. Cryogenic Magnetic Detector-3
1 – vacuum chamber
2 – drift chamber
3 – electromagnetic calorimeter BGO
4 – Z – chamber
5 – CMD SC solenoid
6 – electromagnetic calorimeter LXe
7 – electromagnetic calorimeter CsI
8 – yoke
9 – VEPP-2000 solenoid

15. CMD-3 LXe calorimeter Thickness 5.7 X0 Total LXe mass 1200 kg (400 l)
Fine granularity:
264 –towers for energy measurements
2124 – strip channels (Z and R-f layers) for coordinate measurements.

16. CMD-3 barrel calorimeter energy resolution (CsI+LXe)

17. Motivation for CMD-3 LXe calorimeter
Determination of photon's point of entry to calorimeter with 1 mm resolution allows to reconstruct pi0 and other final states with photons with high accuracy
The calorimeter is longitudinally segmented into seven layers, allowing particle identification using shower profile and dE/dx
Coordinate resolution vs. layer number
Spatial resolution In crystal
calorimeters:
~5-10 mm/E(GeV) !!!!

18. CMD-3 is ready to move at VEPP-2000 (sept 2009)

19. VEPP-3 and VEPP-4M Collider Complex4.
Detector KEDR
ROKK-1M
2Е=211 ГэВ
L=2х10**30 см-2с-1
L= 8х10**31 см-2с-1

20. Detector KEDR at VEPP-4M

21. VEPP-4M and KEDR detector
The luminosity of VEPP-4M is rather low than at B-factories
But some advantages:
Large energy region 2Е=211 ГэВ
Technology of high precision measurement of the beam energy (concentration on high precision particle mass measurement).
Detector KEDR equipped by LKr calorimeter with high energy and space resolution.
High resolution tagging system (two-photon physics).

22. Resonance depolarization method at VEPP-4M
New development of method precision improved by 10 times
The beam energy at VEPP-4M can be measured by this method with accuracy of
5х10-7 ! (Ме /Ме=10-7)

23. Energy measurement by Compton backscattering
VEPP-4M, , MeV

24. Compton backscattering at VEPP-4M
The precision of energy measurement
is KeV ( 1keV for RD!)
BUT!
No polarized beams needed
Energy measurements during
experiments (in case of any jumps RD
used)
Energy spread can be measured with
precision of 5%
A few isotopes used for detector calibration and stability check
The final calibration by resonance depolarization
The new system prepared for BES-III experiment at IHEP (Beijing)

25. Detector KEDR tagging system for two photon physics
Resolution for 2 invariant mass is 0.1%
Only one place where total cross section of  hadrons can be measured
reliably
High energy resolution photon beam (<0.5%) is available:
-Calibration of the detectors
-Study of non-linear QED processes: Delbruk scattering and Photon splitting

26. Physics at KERD&VEPP-4M
High precision measurements of particle masses:
J/, (2S), (3S), D-mesons, -lepton, (1S) (2S) ,(3S), Y(4S)…………….
Spectroscopy of cc and bb states
The measurement of R in the energy region 2E=2-7 GeV
Two photon physic: total cross section hadrons ,
study of C-even states _ _

27. High precision particle mass measurements
with KEDR at VEPP-4M

28. High precision particle mass measurement with KEDR at VEPP-4M
Tau-lepton mass measurement
VERY important for test of μ  universality!

29. Novosibirsk Tay-Charm factory
Exist Injection facility VEPP-5
(will be used for VEPP-4M
and VEPP-2000)
Tunnel for the linac and the technical straight section of the factory is ready
L = 2×10**35 cm-2s-1, Variable energy Ecm= 2 – 5 GeV
(Mashine in Levichev’s presentation)

30. VEPP-5 injection complex (linac’s) status: in operation (2x10¹º e± /s)

31. VEPP-5 injection complex (damping ring) status: in operation

32. Super C/tau Factory at Novosibirsk (physics)
► D-Dbar mixing
► CP violation searches in charm decays
► Rare and forbidden charm decays
► Standard Model tests in  leptons decays
► Searches for lepton flavor violation t→mg
► CP/T violation searches in  leptons decays
Requirements: L > 1035 cm-2 s-1, longitudinal polarization, General Purpose with perfect PID

33. Polarization at Super C/tau Factory
If even one beam polarized,  almost 100% longitudinally polarized near the threshold
Michel parameters
CP-violation in -decays
Polarization may increase sensitivity by several times!

34. Budker INP collaborations (particle physics)
CERN: ATLAS, LHCb
KEK: BELLE
SLAC: BaBar
Super-B
PSI: MEG
BNL: G-2
IHEP :BES-III (energy measurements +analysis)

35. BINP contribution in ATLAS
New designs for LAr EM end-cap calorimeter and presampler have been proposed and accepted by collaboration
Construction:
-test beam facility
-LAr EM end-cap calorimeter
-presampler (full responsibility)
-EM end-assembly table (full responsibility)
-big muon MDT wheels (full responsibility)
-bus-bars for all ATLAS magnet (full responsibility)
Simulation
-EM end-cap calorimeter (full responsibility)
-calorimeter calibration
Computing
-GRID software development
-ATLAS front-end computing development
Commissioning
Data analysis
-search for Mayorano neutrino
-tau-lepton physics

36. BINP contribution in LHb
Beam lost monitor
Computing
Commissioning
Data analysis
LHb is very attractive for BINP’s physicists next step in
B-physics after BELLE and BaBar (Bondar’s presentation)

37. Goal 10-13 (possibly 10-14 in future)
Italy, Japan, Russia,
Switzerland, U.S.A.
The MEG experiment
Approved at PSI in 1999
Goal 10-13 (possibly in future)
BINP contribution to MEG:
Construction (transport SC solenoid)
Data tacking
Data analysis

38. Conclusion
A few generations of colliders and detectors successfully operated at Budker INP with world wide recognized contribution to particle physics
VEPP-4M and VEPP-2000 with 3 detectors are in operation at present interesting physics in the coming years
Budker INP successfully collaborates in a few outstanding experiments outside (we have to keep balance between home and outside experiments)
Super Tau-Charm is a future (but official approval is necessary!)

39. From VEP-1 to Tau-charm factory!
VEPP-2
VEPP-3
VEPP-2000
VEPP-4M
VEPP-4
Tau-charm