Beams Document 6544-v1

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The Recycler and Main Injector in the PIP-II Era

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Phil Adamson
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Phil Adamson
Document Created:
24 Jul 2018, 14:46
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24 Jul 2018, 14:46
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24 Jul 2018, 14:46
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As part of the Nova upgrades in 2012, the Recycler was repurposed as a proton stacker for the Main Injector with the aim to deliver 700 kW. Since January 2017, this design power has been run routinely. The steps taken to commission the Recycler and run at 700 kW operationally while keeping losses under control will be discussed. Looking towards PIP-II, the Recycler and Main Injector will be required to stack and accelerate 50% more beam in order to deliver 1.2 MW beam power for LBNF/DUNE. This intensity increase poses serious challenges of which some will be discussed, such as space charge tune shifts during slip-stacking, transition crossing in the Main Injector and instabilities caused by electron cloud. Different schemes to mitigate these issues, such as resonance compensation and a gamma-t jump system will be investigated.
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