2nd workshop on SuperB17 .03,2006 LNF

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Marcello A. GiorgiUniversità di Pisa and INFN Pisa

Closeout Remarks

2nd Workshop on SuperBFRASCATI 16- 18 March 2006

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OUTLINE

• More on physics case at Super Flavour Factory

• Status of the art• Goals of the workshop

From my opening talk

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From Physics presentationM.Ciuchini

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Olympic medals

Beam Polarization

Run at 4.0 GeV

M.Ciuchini

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ON THE MACHINE

Pantaleo has presented the results of simulations on various possible designs.

John has presented a solution possibly making use of he present PEPII setup and components (including the tunnel)

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Machine design under discussion• USE of ILC DR + ILC FF Requires virtually no R&D- Uses all the work done for ILC- Ring and ff layouts virtually done, 3km circunference rings- 100% Synergy with ILC - IR extremely simplified 80-100 m straight line- Beam stay clear about 30sigmas with 1cm radius beam pipe- Currents around 1.5Amps- Background better than PEP and KEKB- Possibly to operate at the tau with L=10^35- Polarization of one beam considered- UNDER STUDY the possibility to run down to the phi with lumi<10^34- Total cost about half of the ILC e+ DRs (2 e+ 6km rings in ILC) - Power around 40MW, still to be further optimized (goal 25MW)- Possible to reuse PEP RF system, power supplies, Vacuum pumps, etc.,

further reducing the overall cost- Needs the standard injector system, probably a C-band 7GeV linac like in

KEKB upgrade (already designed)

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Round Flat (1) Flat (2) Flat (3)Sigx* m 0.9 30 (1 betatron) 30 (1 betatron) 2.67Etax mm 0.0 +-1.5 +-1.5 0.0Sigy nm 900 12.6 12.6 12.6Betx mm 0.55 2.5 2.5 17.8Bety mm 0.55 0.080 0.080 0.080Sigz_IP mm 0.8 0.100 0.100 4.0Sige_IP 1.0e-3 2.0e-2 2.0e-2 1.0e-3Sige_Lum 0.7e-3 1.0e-3 1.0e-3 0.7e-3Emix nm 1.5 0.4 0.4 0.4Emiy nm 1.5 0.002 0.002 0.002Emiz m 0.8 2.0 2.0 4.0Cross_angle mrad Optional Optional 2*25 2*25Sigz_DR mm 0.8 4.0 4.0 4.0Sige_DR 1.0e-3 0.5e-3 0.5e-3 1.0e-3Np 10e10 7.0 7.0 1.0 2.0Nbunches 10000 10000 5000 5000DR_length km 6.0 6.0 3.0 3.0Damping_time msec 10 10 10 10Nturns_betwe_coll 50 50 1 1Collision freq MHz 10.0 10.0 500 500Lsingleturn 1e36 1.3 1.3 1.2 0.8Lmultiturn 1e36 0.9 0.9 1.0 1.2

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ILC ring & ILC FF

Simplified layout in the Small Disruption Regime Collisions every TurnUncompressed bunchesCrossing angle = 2*25 mradCrabbed Y-Waist

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John Seeman idea:4400m collider (2 rings in the 2200m tunnel

of PEPII)

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Decompressor Decompressor

IPFF FF

ILC ring with ILC FFILC CompressorColliding every turncrossing angle optional

RaimondiFeb 2006

C = 6000 m

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Layout of One Ring: Other Ring is the Reverse!

•

IP AndDetector

Final Focus

ReverseFinal Focus

Damping ring = 2200 m

Bunch expander

Bunch compressor

Linac injector

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Super-B-Factory in a 4400 m Tunnel 0.4 mm

•

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2 most popular solutions

John and Pantaleo designs seems so far the closest to a possible baseline choice.

We need from now and next workshop a lot and well coordinated work to arrive to a satisfactory decision before the summer.

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First meeting of the steering Committee Yesterday, we will meet again tomorrow morning at 9.0

Next workshop on june 14,15,16 (To be confirmed) at SLAC.

Decision on the baseline design for the machine.

Start writing the first conceptual document.

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Toward the CDR

A final workshop is needed in October (beginning of) to be able to write a reasonable CDR before the end of the current year.

A theory workshop will be held contiguous to ours and devoted to the preparation of the physics chapter of the CDR