1. Super-B Overview John Seeman Accelerator Systems Division
SLAC National Accelerator Laboratory
Feb 15, 2009
Super-B Orsay Meeting

2. Outline Overview Results from Mini-MAC Meeting July 2008
Super-B parameters and updates
Interaction region
Lattice
Polarization RF
Collective effects
Feb 15, 2009
Super-B Orsay Meeting

3. Super-B Project
Super-B aims at the construction of a very high luminosity (1 x 1036 cm-2 s−1) asymmetric e+e− flavor factory, with the location at the campus of the University of Rome Tor Vergata, near the INFN Frascati National Laboratory.
Aims:
Very high luminosity
High reliability
Polarized e- at IP
Ability to collide at the Y4S and the J/Psi
Flexibility in achieving the luminosity goals
Feb 15, 2009
Super-B Orsay Meeting

4. Super-B Accelerator Contributors
M. E. Biagini, M. Boscolo, T. Demma, A. Drago, S. Guiducci, M. Preger, P. Raimondi, S. Tomassini, C. Vaccarezza, M. Zobov (INFN/LNF, Italy)
K. Bertsche, Y. Cai, M. Donald, A. Fisher, S. Heifets, A. Krasnykh, A. Novokhatski, M. Pivi, C. Rivetta, J. Seeman, M. Sullivan, U. Wienands, W. Wittmer, G. Yocky (SLAC, USA)
E. Levichev, I. Koop, S. Nikitin, P. Piminov, D. Shatilov, M. Zobov (BINP, Russia)
A. Wolski (Liverpool University, UK)
M. Venturini (LBNL, US)
S. Bettoni (CERN, Switzerland)
A. Variola (LAL/Orsay, France)
G. Marchiori, E. Paoloni (Pisa University, Italy)
T. Agoh, K. Ohmi, K. Oide, Y. Ohnishi (KEK, Japan)
Feb 15, 2009
Super-B Orsay Meeting

5. SuperB footprint on Tor Vergata site
SuperB Ring (about 1800m)
SPARX
Roman Villa
100m
SuperB Injector (about 400m)
SuperB Main Building
Feb 15, 2009
Super-B Orsay Meeting

6. Sky View
Feb 15, 2009
Super-B Orsay Meeting

7. Crab Waist (Raimondi)
Feb 15, 2009
Super-B Orsay Meeting

8. Beams distribution at IP
E. Paoloni
Crab sextupoles
OFF
Without
Crab-sextupoles
waist line is orthogonal
to the axis of one bunch
Crab sextupoles ON
With
Crab-sextupoles
waist moves to the
axis of other beam
All particles from both beams collide in the minimum by region,
with a net luminosity gain
Feb 15, 2009
Super-B Orsay Meeting

9. Lattice layout, PEP-II magnets reuse
Biagini
Lattice layout, PEP-II magnets reuse
Lmag (m)
0.45
5.4
PEP HER -
194
PEP LER
SBF HER
130
SBF LER
224 18
SBF Total
148
Needed 30
Total length 1800 m
280 m
20 m
Dipoles
Available
Needed
Quads
Lmag (m)
0.56
0.73
0.43
0.7
0.4
PEP HER
202 82 -
PEP LER
353
SBF HER
165
108 2
SBF LER 88
SBF Total
253
216 4
Needed
51*
134
Lmag (m)
0.25
0.5
PEP HER/LER
188 -
SBF Total
372 4
Needed
184
Sexts
All PEP-II magnets are reused. Dimensions and fields are properly sized.
Feb 15, 2009
Super-B Orsay Meeting

10. Suggestions from Mini-MAC July 2008
Exciting project!
Establish a management team
Focus design on 1 x 1036 collider as a base line
Plan for parameter flexibility
Finish tests of crab-waist at DAFNE
Perform beam-beam simulations (strong-strong)
Evaluate tolerances
Work on dynamic aperture calculations
Design IR layout
Develop a polarization rotation scheme
Add details to the site layout
Define the injection scheme
Feb 15, 2009
Super-B Orsay Meeting

11. DAFNE Luminosity versus Ib2: Very positive! Congratulations!
Feb 15, 2009
Super-B Orsay Meeting

12. Crab Sextupoles Improve luminosity
Feb 15, 2009
Super-B Orsay Meeting

13. Beam-Beam Simulation of DAFNE (Ohmi)
Feb 15, 2009
Super-B Orsay Meeting

14. July 2008
Feb 15, 2009
Super-B Orsay Meeting

15. Biagini
Feb 15, 2009
Super-B Orsay Meeting

16. SuperB Interaction Region Layout View (Jan 2009)
Sullivan
Sullivan
Feb 15, 2009
Super-B Orsay Meeting

17. SC Quadrupoles at the IP (Paoloni, Bettoni)
Feb 15, 2009
Super-B Orsay Meeting

18. Initial Lost Particles backgrounds (M. Boscolo)
Feb 15, 2009
Super-B Orsay Meeting

19. Locations of Fast Kickers for Luminosity Feedback
K. Bertsche
Feb 15, 2009
Super-B Orsay Meeting

20. Super-B Beam-Beam Simulation (Ohmi)
Feb 15, 2009
Super-B Orsay Meeting

21. Beam-Beam Simulation (Ohmi) (Feb 10, 2009)
Super-B Orsay Meeting

22. Lattice overview LNF, BINP, KEK, LAL, CERN
The SuperB lattice as described in the Conceptual Design Report is the result of an international collaboration between experts from BINP, Cockcroft Institute, INFN, KEKB, LAL/Orsay, SLAC
Simulations were performed in many labs and with different codes:
LNF, BINP, KEK, LAL, CERN
The design is flexible but challenging and the synergy with the ILC Damping Rings which helped in focusing key issues, will be important for addressing some of the topics
Further studies after the CDR completion led to an evolution of the lattice to fit the Tor Vergata Site and to include polarization manipulation hardware. Dynamic aperture calculations have continued.
Feb 15, 2009
Super-B Orsay Meeting

23. Arc cells layout LER HER M. Biagini Cell #1 Cell #1 Cell #2 Cell #2
Feb 15, 2009
Super-B Orsay Meeting

24. Feb 15, 2009
Super-B Orsay Meeting

25. IR Longitudinal Polarization
Polarization of one beam is included in SuperB
Either energy beam could be the polarized one
The LER would be less expensive, the HER easier
HER was chosen for now.
Longitudinal polarization times and short beam lifetimes indicate a need to inject vertically polarized electrons.
The plan is to use a polarized e- source similar to the SLAC SLC source.
There are several possible IP spin rotators:
Solenoids look better at present (vertical bends give unwanted vertical emittance growth)
Expected longitudinal polarization at the IP of about 87%(inj) x 97%(ring)=85%(effective)
Polarization section implementation in lattice: in progress with initial success
Feb 15, 2009
Super-B Orsay Meeting

26. Example of spin rotators
Summer 2008
U. Wienands
Proof-of-principle scheme
No V-emittance growth.
Maybe possible to incorporate
into lattice using the Final Focus
bends to provide the spin rotation.
Work in progress
Feb 15, 2009
Super-B Orsay Meeting

27. Winter 2009
W. Wittmer
Feb 15, 2009
Super-B Orsay Meeting

28. Polarization versus Energy of HER (Wienands)
Feb 15, 2009
Super-B Orsay Meeting

29. Possible layout with spin rotators near IR (Wienands)
Feb 15, 2009
Super-B Orsay Meeting

30. RF Plan: Use PEP-II RF system and cavities
Feb 15, 2009
Super-B Orsay Meeting

31. Super-B RF: Supply power Jan 2009
S. Novokhatski
Super-B RF: Supply power Jan 2009 31
Feb 15, 2009
Super-B Orsay Meeting
01/26/09

32. Impedance budget from S. Novokhatski
In progress
Feb 15, 2009
Super-B Orsay Meeting

33. Super-B Feedback Parameters (A. Drago)
Feb 15, 2009
Super-B Orsay Meeting

34. New feedback Kicker design (A. Krasnykh)
Feb 15, 2009
Super-B Orsay Meeting

35. Conclusions
The Super-B parameters are being optimized around 1 x 1036.
The Mini-MAC in July made good suggestions. All being addressed.
IR design (Jan 2009) has a strong basis to start adding subtle features.
IR polarization (spin) rotators have now been added to the HER lattice. Ring geometrical layout changed a bit.
Beam-beam and dynamic aperture calculations have started. Need to make this work well.
Beam loading and RF parameters have taken the next step. Looks ok.
Next Mini-MAC in late April.
Planning for the Technical Design Report has started.
Feb 15, 2009
Super-B Orsay Meeting

36. Oide
Feb 15, 2009
Super-B Orsay Meeting

37. Summary of KEK Roadmap J-PARC KEKB Photon Factory ERL R&D 1st results
Suzuki
2007
2008
2009
2010
2011
2012
operation & completion of 1st goal
J-PARC
power upgrade
upgrading to Super-KEKB
KEKB
Photon Factory
& upgrade
operation
continue R&D and compact ERL
ERL R&D
construction
operation
1st results
LHC
LHC upgrade
ILC R&D
TDP1
Feb 15, 2009
Super-B Orsay Meeting
lots and lots of R&D’s
TDP2 37

38. Conclusion Image of the Roadmap for Particle Physics
in the Next Decade
guerilla boats
K-decay, MEG, m: g-2 …..
KEKB --> Super-KEKB --> ILC　　　　
T2K　　　　
LHC　　　　
KamLAND
Super-Kamiokande
Feb 15, 2009
Super-B Orsay Meeting 38