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Boron/Lithium start-up

Boron/Lithium start-up. What does Boron with no Li get us?. Potential benefits from no Li HHFW Li issues resolved ELMing H-Mode easier to achieve Density control Li comparison redux ELM, pedestal, snowflake divertor, impurity source and density control studies

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Boron/Lithium start-up

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  1. Boron/Lithium start-up

  2. What does Boron with no Li get us? • Potential benefits from no Li • HHFW Li issues resolved • ELMing H-Mode easier to achieve • Density control • Li comparison redux • ELM, pedestal, snowflake divertor, impurity source and density control studies • Potential down-side to boron • Will coat Mo with C/B • Will consume run time to condition first • May require time to remove B/C layer

  3. Unknowns • Will Boron hamper Li performance later • Equivalent ELMy discharges w/o Boron • How much time for boron phase • Will low levels of Li permit good performance while allowing HHFW to work • CHI less C and O is good • Schedule impact

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