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EBIS and EBIT - Spallation Neutron Source

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Cross<br />

sections<br />

(cm 2 )<br />

10 -15<br />

10 -16<br />

10 -17<br />

10 -18<br />

10 -19<br />

10 -20<br />

10 -21<br />

Single step versus multiple step ionisation<br />

10 1<br />

0 -->1<br />

1 -->2<br />

10 2<br />

2 -->3<br />

3 -->4<br />

4 -->5<br />

5 -->6<br />

6 -->7<br />

7 -->8<br />

0-->1-->2-->3-->4-->5-->6-->7-->8<br />

This takes time – needs confinement !<br />

10 3<br />

argon<br />

0 -->8<br />

Electron energy (eV)<br />

10 4

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