Meeting on Linac4 - PSB BI Line, 01-March-2010

Present:  F. Roncarolo, U. Raich, C. Carli, C. Bracco, B. Goddard, J. Borburgh, B. Balhan, R. Chamizo.

• Specification for BTV (slides BG)
  - No major comments on the requirements presented
  - CC said that PPM would be good if it could be possible.
  - JB noted that this will affect the reliability, which is an important design requirement.
  - UR noted that aging effects should be considered - BG said that he would add total expected dose to specification.
  - FR asked whether this was to be combined with foil viewing - not obvious and needs investigation.
• Multipole component in ramping BS magnets (slides JB)
  - Study of effect of changing graphite resistivity ready in a week or so.
   Harmonic analysis of eddy current effects showed about 10-4 T at the 20mm radius, with coefficient strength dropping with increasing order.
  - Inhomogeneity from magnet geometry expected to be in 10-2 range, so can consider this negligible.
• AOB
  - H0/H- dump and monitor specifications circulating for comments.
  - Failure cases for SMV and DIS - BG and CB to provide some input in 2 weeks, impact parameters and angles. Also investigate utility of DIS scrapers.
  - Analysis of failure case effects on SMV needs rough magnet geometry - JB to provide to RC.

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