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Cost Algorithm for a Super-B Factory

Cost Algorithm for a Super-B Factory. John T. Seeman SBF Workshop SLAC June 15, 2006. Prices. Costs are approximate and can change easily. Oku-yen ~ MEuro ~ M$ Different geometries have very different estimates. Linear-B scheme. HER injection. LER injection. LER. HER.

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Cost Algorithm for a Super-B Factory

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  1. Cost Algorithm for aSuper-B Factory John T. Seeman SBF Workshop SLAC June 15, 2006

  2. Prices • Costs are approximate and can change easily. • Oku-yen ~ MEuro ~ M$ • Different geometries have very different estimates.

  3. Linear-B scheme HER injection LER injection LER HER LER Bunch compressor and FF HER Bunch compressor and FF IP Overall ring length about 6Km, Collision frequency about 120Hz*10000bunch_trains=1.200MHz Bunch train stays in the rings for 8.3msec, then is extracted, compressed and focused. After the collision the bunch is reinjected in its ring

  4. 1.5 GeV Linac 2 GeV Linac 1.5 GeV Linac Damping Rings 2 GeV e- Gun e+ Gun Linac Linac Linear Super B schemes with accelerationand energy recovery, to reduce power 2 GeV e+ injection 4 GeV e- • Use SC linacs to recover energy • Use lower energy damping rings to reduce synchrotron radiation • No electron damping ring • Make electrons fresh every cycle • Damping time means time to radiate all energy • Why not make a fresh beam if storage time is greater than 1 damping time 2GeV e+ DR e- Gun IP 5GeV e+ SC Linac 4GeV e- SC Linac 7GeV e+ e- Dump

  5. Simplified layout in the Small Disruption Regime Collisions every Turn P. Raimondi ILC ring with ILC FF ILC Compressor, 0.4GeV S-Band or 1GeV L-Band Crossing angle optional Decompressor Decompressor FF FF IP Compressor Compressor

  6. Simplified layout in the Small Disruption Regime Collisions every turn Uncompressed bunches Crossing angle = 2*25 mrad Crabbed Y-Waist ILC ring & ILC FF P. Raimondi FF FF IP

  7. SBF projected cost in 2004 for 15 A on 8 A.

  8. K. Oide at CERN Meeting May 2006

  9. SuperKEKB (May 2006) • RF 105 M$ • Vacuum 112 M$ • Magnet 19 M$ • Linac 49M$ • Damping Ring 15 M$ • IR 7 M$ • Beam Monitor 15$ • Intrastructure 76 M$ • Beam transport 2 M$ • Control 6 M$ • Crab cavities 14 M$ • Total 420 M$

  10. SuperKEKB: June 2006 Oku-yen Funakoshi

  11. Draft: top down cost estimate without specific engineering knowledge This is for illustration only and not an official cost estimate.

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