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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???
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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?
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)
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”.
