Ion induced pressure instability: the threat for

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Ion induced pressure instability: the threat for positively charged beams O.B. Malyshev ASTeC Vacuum Science Group, STFC Daresbury Laboratory, UK ECLOUD22, Isola dElba, Italy, 26-30 Sep. 2022 What is the ion induced pressure instability?

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01
Ion induced pressure instability: the threat for positively charged beams O.B. Malyshev

ASTeC Vacuum Science Group,
STFC Daresbury Laboratory, UK

ECLOUD’22, Isola d'Elba, Italy, 26-30 Sep. 2022<br>
02
What is the ion induced pressure instability?<br>
03
Ion induced instability with the negatively charged beams O.B. Malyshev ECLOUD’22, Isola d'Elba, Italy, 26-30 Sep. 2022 3 CO H2 CH4 CO2  beam Residual gas molecules are ionised by the beam

The positively charged ions build up an ion cloud along the negatively charged beam path

The ions cause the ion induced beam instability

Mitigation:
Better pumping system
Ion collectors + + + + + + + + + + + + + +<br>