Welcome to the 1 st Open Meeting of the Super KEKB Collaboration. (T. Browder, University of Hawaii) [All talks and discussions about the detector, physics.

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Presentation transcript:

Welcome to the 1 st Open Meeting of the Super KEKB Collaboration. (T. Browder, University of Hawaii) [All talks and discussions about the detector, physics and accelerator are open. However, there will be a closed session to discuss critical collaboration issues. The meetings will continue to have this format for at least the next year.]

Critical Role of the B factories in the verification of the KM hypothesis was recognized by the Nobel Foundation (Sorry, Yamauchi, Oide, Takasaki, Suzuki, and Olsen are in Stockholm).

KEKB is the world center for R+D on the Super B factory accelerator If you are a new member, and have time. Please go and see the KEKB control room. KEKB/Belle: A consistent track record of exceeding expectations

 x * =0.9m  x * =1.5m  x * =0.9m crab off

Crab cavities installed and undergoing testing in beam The superconducting cavities will be upgraded to absorb more higher-order mode power up to 50 kW. The beam pipes and all vacuum components will be replaced with higher-current design. The state-of-art ARES copper cavities will be upgraded with higher energy storage ratio to support higher current. SuperKEKB e- 4.1 A e+ 9.4 A will reach 8 × cm -2 s -1 Dampiing ring 5 New IR  * y = σ z = 3 mm Higher current More RF New vacuum system Crab crossing + Linac upgrade

Super Belle (Baseline) New Dead time free readout and high speed computing systems ECL Wave sampling + pure CsI crystal(endcap) PID Threshold Aerogel + TOF → TOP + Aerogel-RICH SVD 4-lyr DSSD → 6lyr DSSD (inner pixels ) CDC Super small cell Longer lever arm KL/  detection RPC → Scintillator +SiPM(endcap)

Schedule is tight (start in 2013) Near-term plan (preliminary) –Detector study report has been completed. –Detector proposals (by summer 2009). –The final detector design by Dec Detector proposals Internal review TDR Actions to invite new collaborators Kick-off meeting (Dec 08) KEKB operation

Super KEKB Luminosity Prospects 3 year shutdown for upgrade 10ab -1 (10x present) L~8x10 35 cm -2 s -1 50ab -1 by ~2020 x50 present

Some goals of this meeting: Reactivate update physics studies groups and conclusions. Update our understanding of the physics issues Decide on baseline options for inner vertexing as well as prepare for final PID decisions. Begin formal set up of collaboration organization. (closed session) Update machine/detector interface design and make more realistic background configurations

BACKUP SLIDES

11 symbolLERHERunit Beam EnergyE3.58.0GeV Beam currentI9.44.1A CircumferenceC3016m Number of bunches nbnb 5018 Number of particles N/bunc h x10 10 Emittance xx 9nm Emittance ratio  y/  x 0.5% Beta (hor.) at IP x*x* 200mm Beta (ver.) at IP y*y* 3mm Bunch length zz 3mm Crossing angle x*x* 30 to 0mrad Beam-Beam (hor.) xx 0.36 Beam-Beam (ver.) yy 0.43 RF AC plug powerP AC 73MW LuminosityL 8.0 x10 35 cm -2 s - 1

12 ItemObject Oku-yen = 1.0 M$ Luminosity New beam pipes Enable high current Reduce e-cloud 178 (incl. BPM, magnets, etc.) x1.5 New IRSmall β*31x2 e+ Damping Ring Allow injection with small increase e+ capture 40 incl. linac upgrade if not, x0.75 More RF and cooling systems High current 179 (incl. facilities) x3 Crab Cavities Higher beam-beam param. 15x2 - x4 Items are interrelated. Tunnel already exists. Most of the components (magnets, klystrons, etc.) will be re-used.