Meeting on Linac4 - PSB BI Line, 15-February-2010

Present:  L. Sermeus, C. Bracco, C. Carli, R. Noulibos, B. Goddard, M. Hourican, J. Borburgh, R. Chamizo, M. Eshraqi

• Follow up previous meetings
  It was mentioned that the specification for the H0/H- injection beam dump is being prepared to be send out for approval. This will be done simultaneously with the specification for the measurement of the beam current at the PSB H0/H- injection beam dump, to be discussed during our next meeting.
• BI.SMV design specifications
  WW presented the current status of the BI.SMV design specifications. For the yoke apertures the specified beam size at 160 MeV, Dispersion -1.4 ± 0.4% and 0.44% momentum shift was used. ME will verify these values and present the results during our meeting in 2 weeks time.
  MH presented the Progress on the BI.SMV magnet design. A Curved magnet yoke has been assembled and verified and the alignment of the laminations was found to be good and this type of yoke could be used to house a curved coil. It is proposed to house the new BI.SMV inside a circular tank. RC mentioned that the head and tail dump will be about 150mm long and it was proposed that she will present the preliminary results on H0 dump simulations during our next meeting.
• BS chicane magnet options; discussion of technical feasibility of 0.5 ms and 5ms decay times
  JB presented the first simulations results of the dump impact on the BS4 field for fast decay under vacuum magnets and slow decay outside vacuum magnet. For the simulations a segmented dump was used and the results show that perturbation of the field in the gap is acceptable for both versions. The preliminary conclusion is that both versions could be envisaged and that mechanical/integration preferences will guide the final choice. The study of the influence of a single, not segmented, graphite block is ongoing and the results will be presented during our next meeting.   
• AOB

WW