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Optimizing CEBAF Energy Use for Experimental Campaigns

Learn how to set up CEBAF machine at <12 GeV for experiments, balance gradient and passes, leverage polarization, and cut energy consumption. Explore system headroom, C25 to C50 conversion, and group scheduling for efficiency. Solve the optimization challenge for impactful results.

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Optimizing CEBAF Energy Use for Experimental Campaigns

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  1. Reducing Energy Consumption of CEBAF & the Experimental Program Operational Paradigms (Machine setup): How do we set up the machine for a specific experimental “campaign” if the total energy is <12 GeV?? • Use 12 GeV gradient with fewer passes?? • Leave all RF on but turn it down??? • Turn off some RF and run others full out??? or the number of passes is < 5 (5.5)?? • Turn off box supplies for unused arcs??? (machine setup challenge) How do you balance the gradient/# of passes equation?? How does polarization at the endstation play into this?

  2. What’s the leverage?? The energy consumption of some 12 GeV CEBAF systems 1MW for 35wks = 5.88mil kw-hrs @ $0.065/kw-hr = $382.2k (~3.5FTE’s)

  3. Reducing Energy Consumption of CEBAF & the Experimental Program Other “Things”: • System “head room” – i.e. Trip rate optimization wrt experimental requirements. What is good enough? • Should C25’s be reprocessed into C50’s for the sake of energy efficiency?? • Scheduling – does it make sense to group certain experiments together for the sake of energy efficiency?? Should this be added into the scheduling algorithm?? Bottom Line: It’s an optimization problem that forces the understanding of how power is utilized, leading you to the systems or operational paradigms whose improvement would have the “most bang for the buck”.

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