CERN Accelerating science

Article
Report number	SLAC-PUB-11248
Title	A Preliminary Interaction Region Design for a Super B-Factory
Author(s)	Sullivan, Michael K ; Biagini, Maria ; Donald, Martin ; Ecklund, Stanley ; Novokhatski, Alexander ; Seeman, John ; Wienands, Ulrich
Affiliation	(INFN/LNF, Frascati (Roma) ; (SLAC)
Publication	2005
Imprint	May 2005
Number of pages	3
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2077
Abstract	The success of the two B-Factories (PEP-II and KEKB) has encouraged us to look at design parameters for a B-Factory with a 30-50 times increase in the luminosity of the present machines (L 1e36). In order to achieve this high luminosity, the beta y* values are reduced to 3-2 mm, the bunch spacing is minimized (0.6-0.3 m) and the bunch currents are increased. Total beam currents range from 5-25 A. The interaction region (IR) of these &quot;SuperB&quot; designs presents special challenges. Synchrotron radiation fans from local bending in shared magnets and from upstream sources pose difficulties due to the high power levels in these fans. High-order-mode(HOM)heating, effects that have been seen in the present B-factories, will become much more pronounced with the very short bunches and high beam currents. Masking the detector beam pipe from synchrotron radiation must take into account effects of HOM power generation. Backgrounds that are a function of the luminosity will become very important. We present an initial design of an IR with a crossing angle of &#177; 14 mrad and include a discussion of the constraints, requirements and concerns that go into designing an IR for these very high luminosity e<sup><font size="-1">+

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