1. Status of the VEPP-2000 Collider Project at Novosibirsk
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Status of the VEPP-2000 Collider Project at Novosibirsk
VEPP-2000 team
Budker Institute of Nuclear Physics,
630090, Novosibirsk, Russia
30th Advanced ICFA Beam Dynamics Workshop, SLAC
14 October 2003

2. Layout of the VEPP(-2M)-2000 collider complex
ILU
3 MeV
Linac B
-3M
200 M eV
synchro-
betatron
BEP
e,e
booster –+
900 M
VEPP-2M
SND
180–700 M
RF cavity SC
wiggler
CMD -2 ee – +
convertor e
VEPP-2M ( )
ILU
3 MeV
Linac B
-3M
200 M eV
synchro-
betatron
BEP
e,e
booster –+
900 M
SND
CMD -2 ee – +
convertor
2 m
♦ E  1 GeV (per beam)
♦ L  1×1032 cm-2 sec-1 (1×1 bunch)

3. Tasks for VEPP-2000 e+ + e- p + anti-p ; n + anti-n .
1. To study “peculiarities” above 1.4 GeV (total).
2. To measure with good enough precision total hadron cross-section
in GeV (total) - for hadron contribution to muon g-2.
3. To measure form-factors (in time-like region) for
protons and neutrons
e+ + e-
p + anti-p ;
n + anti-n .
4. For accelerator physics: “Round Beams”!

4. Increasing the Luminosity
Number of bunches
Bunch-by-bunch luminosity
Round Beam:
Geometric factor
Beam-beam limit enhancement

5. (V.V.Danilov et al, Frascati Physics
Concept of Round Beams
Conservation of the z-component
of angular momentum
Round cross-section of beams at IP
Machine optics has rotational symmetry
Requirements:
4×4 transfer matrix
Motion in central field with additional integral of motion
reduces the transverse oscillations from 2D to 1D!
(V.V.Danilov et al, Frascati Physics
Series Vol. X (1998), p.321)

6. Practical Realization of Round Beams: Options for VEPP-2000

7. Practical Realization of Round Beams
Conversion of conventional machine using beam adapters
Touschek problem for low energy:
worse life time!
(A.Burov, S.Nagaitsev, Ya.Derbenev, FERMILAB-Pub-01/060-T)

8. View of the Collider

9. Lattice

10. Weak-Strong Beam-Beam Simulation
Emittance of the weak beam vs. the beam-beam parameter. Sextupoles off. 1,2 – two codes.

11. Weak-Strong Beam-Beam Simulation
Emittance of the weak beam vs. the beam-beam parameter. Sextupoles on. 1,2 – two codes.

12. Strong-Strong Beam-Beam Simulation
Macroparticles/bunch Np = 50000, transverse mesh 128x128;
Field calculated via FFT
(K.Ohmi, Phys. Rev. E 59, 7287 (2000))

13. Strong-Strong Beam-Beam Simulation
Beam size and luminosity vs. the nominal beam-beam parameter ( PAC’2003 )

14. Strong-Strong Beam-Beam Simulation
Comparison of the sextupoles on and off options.

15. Main Parameters of VEPP-2000

16. Dipole Magnet (2.4 T)

17. Dipole: Magnetic MeasurementsGs

18. Dipole: Magnetic Measurements
Guiding field 2.38 T
х, cm
Guiding field 0.6 T
х, cm

20. Quadrupole

21. Quadrupole: Magnetic Measurements

22. Vacuum Chamber

23. Single-Mode RF Cavity (172 МHz)

24. Calculated main mode & HOM

25. RF cavity parts

26. Solenoid 13.0 T

27. Solenoid: Coils
Nb-Sn
Nb-Ti

28. Assembly of the Nb-Ti and Nb-Sn coils
Assembly of the Nb-Ti and Nb-Sn coils

29. VEPP-2000 Luminosity

30. POSITRON SOURCE target debuncher electron gun 300 MeV linac
Damping ring
To VEPP-2000
subharmonic
target
photo-gun
linac
to VEPP-4

31. hall of MeV linacs

32. 510 MeV dampintg ring

34. Summary ♠ Start of VEPP-2000 construction – January 2000
♠ Dipole, quads, sextupoles, skew-quads, steering coils,
6 from 8 vacuum chamber are ready, tested and installed
♠ 13 T field is achieved in solenoid prototype
♠ Weak-strong and strong-strong simulation show high ξ for the round beams
♠ Construction of transfer line from e+ source is going on
♠ Beam → at the end of 2004 ♠