Cost Algorithm for a Super-B Factory

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Presentation transcript:

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 Overall ring length about 6Km, LER injection HER 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

Linear Super B schemes with acceleration and energy recovery, to reduce power 2 GeV e+ injection 4 GeV e- 2GeV e+ DR e- Gun IP 5GeV e+ SC Linac 4GeV e- SC Linac 2 GeV Linac 1.5 GeV Linac Linac Damping Rings 2 GeV e+ Gun e- Gun 7GeV e+ e- Dump 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

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

ILC ring & ILC FF 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

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

K. Oide at CERN Meeting May 2006

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$

SuperKEKB: June 2006 Oku-yen Funakoshi

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