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LIU SPS Beam Scraping System Review Summary 22 nd January 2013

LIU SPS Beam Scraping System Review Summary 22 nd January 2013. J. Wenninger , G. Rumolo , M. Meddahi , B. Goddard. LIU SPS Beam Scrapping Review, 22 January 2013. Contributions. Many excellent contributions covering the different aspects of beam scraping at the SPS. Options.

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LIU SPS Beam Scraping System Review Summary 22 nd January 2013

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  1. LIU SPS Beam Scraping System ReviewSummary22nd January 2013 J. Wenninger, G. Rumolo, M. Meddahi, B. Goddard LIU SPS Beam Scrapping Review, 22 January 2013

  2. Contributions • Many excellent contributions covering the different aspects of beam scraping at the SPS.

  3. Options • Keep the existing scraper system based on a thin mechanical scraper. • Install a new scraper system based on a magnetic bump and absorber. • Advanced / R&D scraping techniques were presented, but they are not sufficiently developed to be an option for this review.

  4. Existing scraping system • After worries during initial LHC operation, very good experience was accumulated in the past 2 years with the system installed in BA1. • But the system has some drawbacks.

  5. New scraping system for BA6 • The design of this new system was started while there were serious worries with the thin scraper system installed in BA5. • Very good system – tailored to the job. • Induced radiation in BA6 its only ‘serious’ drawback.

  6. Recommendations • The current system should be kept as operational scraping system. There are currently no serious issues that would justify building a new system. • But some actions should be implemented (next slide). • The new scraping design was demonstrated to work. It should be kept ready as technical design for possible future operation, for example in case the actions associated to the current system reveal serious issues. • The work should be carefully documented as a design report, such that it can be implemented rapidly if needed. • The effort on crystal extraction should be pursued; ABT available to work on a design (optics, bump, absorber).

  7. Actions for the existing system • Organize an MD at the end of the run to asses damage limit : full scraping with high intensity beam – Action K. Cornelis / EN/STI • Visual inspection of the blades during LS1 – Action: EN/STI • Fatigues tests to be performed during LS1 on a test stand– Action:EN/STI • Prepare an estimate of radiation dose for an intervention during operation (scraper exchange) – Action: H. Vincke/ EN/STI • Define spare policy (BA5?) – Coordination: M. Meddahi • Evaluate other materials or designs for the scraper blade – Action: EN/STI – TE/ABT – H. Vincke • Revision of LIU requirements for existing system: limit to 25% of full beam scraping ( protection by BLMs) –Action: M. Meddahi / EN/STI • Loss localization: study possibility of ‘momentum collimation’ of the debris from the scraper – Coordination: M. Meddahi

  8. Actions for the new system • Write the Technical Design Report – Action: O. Mete et al.

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