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B field and R VTX

B field and R VTX. Yasuhiro Sugimoto KEK Feb.4, 2008. Baseline design for LOI. Agreement in a phone meeting Two configurations 5 single layers 3 doublets Same inner and outer radii (Rout=60mm) |cos q |=0.95 for inner three layers and outer two layers have same length as the 3ed layer

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B field and R VTX

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  1. B field and RVTX Yasuhiro Sugimoto KEK Feb.4, 2008

  2. Baseline design for LOI • Agreement in a phone meeting • Two configurations • 5 single layers • 3 doublets • Same inner and outer radii (Rout=60mm) • |cosq|=0.95 for inner three layers and outer two layers have same length as the 3ed layer • |cosq|=0.95 for inner two doubles and outer doublet has the same length as the 2nd doublet

  3. Pair background simulation • Generator: CAIN • Crossing angle: 14 mrad • B-field: 3, 3.5, and 4T • Machine parameters: Nominal option in 2005 * Talk by Andrei Seryi at SiD Workshop at SLAC, Jan. 2008

  4. Distribution of p.b. core

  5. Design criteria • Pair background core should not hit the beam pipe • Somewhat realistic assumption for the gaps and spaces (G1, G2, L1, L2)

  6. Results • Assumption • G1 = 2 mm • G2 = 4 mm (core-pipe:2mm and pipe-ladder:2mm) • L1 = 5 mm • L2 = 20 mm • Minimum radius

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