1. Super-B Accelerator Status
J. Seeman
For the Super-B Accelerator Consortium
June 16-19, 2009
Perugia Meeting

2. Outline Overview Project high level organization
Accelerator Consortium
Mini-MAC meeting April 2009
Super-B parameter list
TDR planning
June 16-19, 2009
Perugia Meeting

3. How Super-B accelerator fits in the Super-B Project
June 16-19, 2009
Perugia Meeting

4. Super-B Accelerator Technical Board
Accelerator collaboration:
J. Seeman
Scientific-Technical:
P. Raimondi
S. Tomassini
U. Wienands
Regional coordinators:
M. Biagini Italy
M. Sullivan US
G. Bassi UK
E. Levichev Russia
A. Variola France
June 16-19, 2009
Perugia Meeting

5. Super-B Accelerator CDR Contributors (2008)
M. E. Biagini, R. Boni, M. Boscolo, T. Demma, A. Drago, S. Guiducci, M. Preger, P. Raimondi, G. Sensolini, S. Tomassini, C. Vaccarezza, M. Zobov (INFN/LNF, Italy)
K. Bertsche, M. Donald, A. Fisher, S. Heifets, A. Novokhatski, M. Pivi, J. Seeman, M. Sullivan, U. Wienands, W. Wittmer, G. Yocky (SLAC, US)
I. Koop, S. Nikitin, E. Levichev, P. Piminov, D. Shatilov (BINP, Russia)
G. Bassi, A. Wolski (Cockroft Institute, UK)
M. Venturini (LBNL, US)
S. Bettoni (CERN, Switzerland)
A. Variola (LAL/Orsay, France)
E. Paoloni, G. Marchiori (Pisa University, Italy)
K. Ohmi (KEK, Japan)
June 16-19, 2009
Perugia Meeting

6. TDR Super-B Accelerator Contributors (Spring 2009)
D. Alesini, M. E. Biagini, R. Boni, M. Boscolo, A. Clozza, T. Demma, A. Drago, M. Esposito, A. Gallo, S. Guiducci, V. Lollo, G. Mazzitelli, C. Milardi, L. Pellegrino, M. Preger, P. Raimondi, R. Ricci, C. Sanelli, G. Sensolini, M. Serio, F. Sgamma, A. Stecchi, A. Stella, S. Tomassini, C. Vaccarezza, M. Zobov (INFN/LNF, Italy)
K. Bertsche, A. Brachmann, Y. Cai, A. Chao, A. DeLira, M. Donald, A. Fisher, D. Kharakh, A. Krasnykh, N. Li, D. MacFarlane, Y. Nosochkov, A. Novokhatski, M. Pivi, J. Seeman, M. Sullivan, U. Wienands, J. Weisend, W. Wittmer, G. Yocky (SLAC, US)
A. Bogomiagkov, S.Karnaev, I. Koop, E. Levichev, S. Nikitin, I. Nikolaev, I. Okunev, P. Piminov, S. Siniatkin, D. Shatilov, V. Smaluk, P. Vobly (BINP, Russia)
G. Bassi, A. Wolski (Cockroft Institute, UK)
S. Bettoni (CERN, Switzerland)
M. Baylac, J. Bonis, R. Chehab, J. DeConto, Gomez, A. Jaremie, G. Lemeur, B. Mercier, F. Poirier, C. Prevost, C. Rimbault, Tourres, F. Touze, A. Variola (CNRS, France)
A. Chance, O. Napoly (CEA Saclay, France)
F. Bosi, E. Paoloni (Pisa University, Italy)
At present approximate totals:
10 FTEs from LNF Frascati
4.5 FTEs from SLAC
3 FTEs from BINP Novosibirsk
2.5 FTEs from France
0.5 FTEs from Pisa
Not complete!
June 16-19, 2009
Perugia Meeting

7. Mini-MAC Members Full Attendance at this Meeting April 23-24, 2009.
Klaus Balewski (DESY)
John Corlett (LBNL)
Jonathan Dorfan (SLAC, Chair)
Stuart Henderson (ORNL)
Tom Himel (SLAC)
Claudio Pellegrini (UCLA)
Daniel Schulte (CERN)
Ferdi Willeke (BNL)
Andy Wolski (Liverpool, by phone)
Frank Zimmermann (CERN)
June 16-19, 2009
Perugia Meeting

8. Mini-MAC PARAMETER REQUIREMENTS FROM PHYSICS
Comment
Luminosity (top-up mode)
1036 U(4S)
Integrated luminosity
75 ab-1
Based on a “New Snowmass Year” of 1.5 x 107 seconds (PEP-II experience-based)
CM energy range
From just below charm ≈t threshold to U (5S)
For a better study of CP violation in Charm and for BS measurements.
Minimum boost
bg = 0.28 (4x7 GeV)
1 cm beampipe radius. First measurement at 1.5 cm
e- Polarization
60-85%
Enables t CP and T violation studies, measurement of t g-2 and improves sensitivity to lepton flavor-violating decays. Detailed simulation, needed to ascertain a more precise requirement, are in progress.
LNF April 24,2009
June 16-19, 2009
Perugia Meeting
Marcello A. Giorgi 8 8

9. Highlights from the MAC Committee April 23-24, 2009
Committee: Klaus Balewski (DESY), John Corlett (LBNL), Jonathan Dorfan (SLAC, Chair), Stuart Henderson (ORNL), Tom Himel (SLAC), Claudio Pellegrini (UCLA) , Daniel Schulte (CERN), Ferdi Willeke (BNL), Andy Wolski (Liverpool), Frank Zimmermann (CERN)
“The MAC now feels secure in enthusiastically encouraging the SuperB design team to proceed to the TDR phase, with confidence that the design parameters are achievable.” Recent strong progress:
Crab waist tests at DAFNE
Beam-beam measurements (DAFNE) and simulations
IR design
Lattice
Polarization spin rotators
“Nonetheless, much detailed work remains to bring the design to the level where (a) ground-breaking, (b) final engineering of accelerator components can commence.” Further needed work areas:
Emittance tuning and evaluate tolerances
Dynamic aperture calculations
IR and arc vacuum systems
Injection system
Vibration studies
Polarization lattice
June 16-19, 2009
Perugia Meeting

10. TDR Topic List Vacuum system Arcs pipe Straights pipe IR pipe
e-cloud remediation electrodes
bellows
impedance budget simulations
pumping system
Diagnostics
Beam position monitors
Luminosity monitor
Current monitors
Synchrotron light monitor
R&D on diagnostics for low emittance
Feedbacks
Transverse
Longitudinal
Orbit
Luminosity
Electronics & software
Control system
Architecture
Design
Peripherals
Injection System
Polarized gun
damping rings
spin manipulators
linac
positron converter
beam transfer systems
Collider design
Two rings lattice
Polarization insertion
IR design
beam stay clear
ultra-low emittance tuning
detector solenoid compensation
coupling correction
orbit correction
stability
beam-beam simulations
beam dynamics and instabilities
single beam effects
operation issues
injection scheme
RF System
RF specifications
RF feedbacks
Low level RF
Synchronization and timing
Site
Civil construction
Infrastructures & buildings
Power plants
Fluids plants
Radiation safety
Magnets
Design of missing magnets
Refurbishing existing magnets
Field measurements
QD0 construction
Power supplies
Injection kickers
Mechanical layout and alignment
Injector
supports
June 16-19, 2009
Perugia Meeting

11. Tor Vergata Site (February)
CDR
~2008
June 16-19, 2009
Perugia Meeting

12. Potential LNF Super-B location (May)
(Tomassini, Raimondi,
and Sanelli, May 09)
June 16-19, 2009
Perugia Meeting

13. Injector RF Layout (Boni, Guiducci, Seeman) A B C D ACCELERATING FIELD
e- DR
> 4 GeV e- A B C D
GUN
SHB
L GeV
5.7 GeV
0.1GeV
0.8 GeV
> 7 GeV e+ PS
e+ DR
ACCELERATING FIELD
MEDIUM GRADIENT
HIGH GRADIENT
23 MV/m
26 MV/m
60 MW
klystron
50 MW
klystron
55 MW
45 MW X X
SLED
SLED
≈ 210 MeV
≈ 156 MeV

14. Luminosity Equation for a Circular e+e- Collider
xy is the beam-beam parameter (~0.09)
Ib is the bunch current (~1 mA)
n is the number of bunches (~1500)
by* is the IP lattice optics function (vertical beta) (<0.2 mm)
E is the beam energy (4 and 7 GeV)
Luminosity (1036 cm-2 s-1)
June 16-19, 2009
Perugia Meeting

15. Super-B Parameter Options
June 16-19, 2009
Perugia Meeting

16. Comparison of design and achieved beam emittances (*achieved)
E (GeV)
C (m) g
ex (nm)
gex (mm)
ey (pm)
gey(nm)
Spring-8 8
1430
15656 6 94 5 78
ILC-DR
6400
9785 1 10 2 20
Diamond* 3
561
5871
2.7 16 29
ATF*
1.28
138
2524
2.5 4
SLS*
2.4
288
4700 28
3.2 15
SuperB LER
1800
7828
2.8 22 7 55
SuperB HER
13699
1.6
Emittance tuning techniques and algorithms have been tested in simulations and experiments on the ATF and on the other electron storage rings to achieve such small emittances (ex. CesrTA as an ILC-DR test facility has a well established one).
(Biagini)
June 16-19, 2009
Perugia Meeting

17. Simulations for SuperB
Strong-Strong
Weak-Strong
Quasi-Strong-Strong
(June 2008 parameters)
K. Ohmi
June 16-19, 2009
Perugia Meeting

18. Luminosity and Dynamic Aperture Scans
Piminov, Shatilov, Zobov Qx Qy
Tune point optimization is done together with bb simulations and luminosity and lifetime optimization
June 16-19, 2009
Perugia Meeting

19. Injector and Linac Will the SLC polarized gun be adequate?
Can a short pulse polarized laser on the cathode make a 3 mm bunch?
Can the beam emittance from the gun be smaller?
Parameters of the spin rotators?
RF and structure design? (Boni)
Quadrupole lattice for the linac?
Quadrupole lattice for the transport lines?
Geometry of the transport lines?
Diagnostics needed?
Tolerances on magnets and RF?
June 16-19, 2009
Perugia Meeting

20. Damping Rings Lattice (~54 m) (Guiducci) DR energy: 1 GeV or 800 MeV?
RF parameters?
Injection septa and kickers?
Vacuum system needed?
Tolerances of all magnets, RF, alignment?
June 16-19, 2009
Perugia Meeting

21. Ring Injection Injection kicker design? Septa design?
Septa fringe fields on stored beam?
June 16-19, 2009
Perugia Meeting

22. Arc Lattice
Raimondi, Biagini, Wittmer, Wienands
Arc cell: flexible solution is based on decreasing the natural emittance by increasing mx/cell, and simultaneously adding weak dipoles in the cell drift spaces to decrease synchrotron radiation
All cells have: mx=0.75, my=0.25  about 30% fewer sextupoles
Better DA since all sextupoles are at –I in both planes (although x and y sextupoles are nested)
Distances between magnets compatible with PEP-II hardware
All quads-bends-sextupoles in PEP-II range
Arcs & FF
June 16-19, 2009
Perugia Meeting

23. Possible layout with spin rotators near IR (Wienands, Wittmer)
June 16-19, 2009
Perugia Meeting

24. Polarization versus Energy of HER (Wienands)
June 16-19, 2009
Perugia Meeting

25. Dipoles Quads Sexts 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
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 can be used, dimensions and fields are in range
RF requirements are met by the present PEP-II RF system
June 16-19, 2009
Perugia Meeting
Biagini

26. PEP-II Magnets and RF Components
June 16-19, 2009
Perugia Meeting

27. (A. Drago)
June 16-19, 2009
Perugia Meeting

28. HER/LER Lattice design? (Raimondi, Wienands, Wittmer)
General magnet parameters? (Biagini)
New magnet designs?
Tolerances on fields and power supplies?
Dynamic aperture calculations (Yocky, Donald, BINP)
Vacuum system design?
Pumping and vacuum requirements?
Diagnostics (BPMs, SLMs, BLM, polarimeter)?
HOM reduction? (Novokhatski, ?)
Skew quadrupoles needed?
Magnet movers?
Vibration requirements and damping?
Supports?
Water cooling requirements?
Beam loss monitors
Shipping and refurbishing PEP-II magnets? (Kharakh, Seeman, Sullivan)
June 16-19, 2009
Perugia Meeting

29. RF Plan: Use PEP-II RF system and cavities
(Novokhatski, Bertsche)
June 16-19, 2009
Perugia Meeting

30. Super-B RF: power required
S. Novokhatski
Jan. 2009
Super-B RF: power required 30
June 16-19, 2009
Perugia Meeting
01/26/09

31. RF System PEP-II system reuse?
Needed RF-longitudinal parameters? (Novokhatski)
Refurbishment needed?
Need more cavities?
Klystron inventory?
Radiation shielding?
Supports?
HV power supply rebuilds for 50 Hz?
June 16-19, 2009
Perugia Meeting

32. SuperB Interaction Region Layout View (Jan 2009)
Sullivan
M. Sullivan
June 16-19, 2009
Perugia Meeting

33. SC Quadrupoles at the IP (E. Paoloni, S. Bettoni)
June 16-19, 2009
Perugia Meeting

34. Locations of Fast Dipoles for Luminosity Feedback
K. Bertsche
June 16-19, 2009
Perugia Meeting

35. IP (+/- 3 m) Beam separation and beam stay clear? (Sullivan)
Be chamber at IP?
Magic vacuum flange?
Expansion bellow in IP?
IR quadrupoles? (Paoloni, Bettoni)
Solenoid compensation (antisolenoids, skew quads, skew sextupoles)?
Steering to bring beams into collisions?
Fast collision feedback? (Bertsche, Sullivan)
IR supports?
Vibration sensitivity and active damping?
Vacuum pumping for sub-nTor pressures?
Luminosity monitor?
Assembly fixtures and procedure?
Power supply specifications?
June 16-19, 2009
Perugia Meeting

36. W. Wittmer
June 16-19, 2009
Perugia Meeting

37. Final Focus (+/- 200m)
Chromatic corrections? (Wittmer, Wienands, Raimondi)
Collimation?
Separation geometry? (Raimondi, Nosochkov)
Vacuum chambers and pumping?
Tolerances on vibration and power supplies?
New magnets needed?
Special diagnostics?
June 16-19, 2009
Perugia Meeting

38. Safety Systems Fire suppression? Safety egress (40 m?, 300m?, 5000 m?)
Smoke alarms?
Earthquake?
Radiation monitoring?
Personnel Protection zones? …
June 16-19, 2009
Perugia Meeting

39. Accelerator Technical Board
Charge:
Make technical and management suggestions to the Super-B accelerator consortium.
Review technical accelerator parameters of the Super-B Accelerator.
Suggest parameters that should be included in the Global Accelerator Parameter Document.
Suggest a person to be responsible for each accelerator parameter in the spreadsheet.
Present members:
M. Biagini, E. Levichev, P. Raimondi, J. Seeman, M. Sullivan, S. Tomassini, A. Variola, U. Wienands, G. Bassi
June 16-19, 2009
Perugia Meeting

40. Initial Accelerator Tech. Board Parameters
June 16-19, 2009
Perugia Meeting

41. Super-B Conclusions
The Super-B parameters are being optimized around 1 x 1036.
The team is addressing the Accelerator Mini-MAC suggestions from the April meeting.
IR present design has a solid basis; now start adding engineering features.
IR polarization (spin) rotators have now been added to the HER lattice. Polarization has changed the geometrical layout.
Beam-beam and lattice dynamic aperture calculations are continuing. The new lattice layouts show improvement.
Beam loading and RF parameters have taken the next solid step. Looks acceptable.
Organizing and planning for the Technical Design Report aiming at Fall 2010.
June 16-19, 2009
Perugia Meeting