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LHC MD#4 draft planning

This document outlines the draft planning for LHC MD#4, detailing the proposed schedule and necessary tasks to achieve scientific objectives. Key components include 84 hours of planned activities, incorporating checks with nominal bunches, TCT alignment, and validation processes. The plan includes two ramps for electron cloud effects and long-range beam-beam interactions, with special tests on octupole polarity. Recommendations emphasize completing the work earlier than MD#4 for enhanced data collection and statistical analysis during physics fills.

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LHC MD#4 draft planning

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  1. LHC MD#4 draft planning F. Zimmermann and G. Papotti LMC, 07.11.2012

  2. LHC Schedule v2.6

  3. MD#4: 84h • 25 ns MD: 36h • on top of 24h setup • check with 3 nom. bunches, TCT alignment, validation • 2 ramps for ecloud at the flat top (and arc UFOs) • 2 ramps for long range beam-beam • new request: ‘old’ octupole polarity test • requested at LBOC yesterday • 1 ramp for chroma, 1 ramp with 3 nom. bunches for settings, 1 ramp with 480b: min 12h • effects to be then observed in physics fills • recommendation, if approved: carry out earlier than MD#4 to have enough fills to draw conclusions based on statistics

  4. draft plan for MD block #4 total: 84 h

  5. not (yet) scheduled

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