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Questions lecture 3 MV

What limits the use of a conventional focusing system at low energy in a proton/ion linac, forcing us to use RFQs? What do you need in order to deliver a high brightness beam to your users? What are the causes of filamentation ? And what is its effect?

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Questions lecture 3 MV

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  1. What limits the use of a conventional focusing system at low energy in a proton/ion linac, forcing us to use RFQs? What do you need in order to deliver a high brightness beam to your users? What are the causes of filamentation? And what is its effect? What have in common the low-energy sections of proton and electron linacs? How many consecutive identical cells can we have in a linac structure? And what limits their number? Why heavy ion linacs have lower operating frequencies than proton linacs? And why electron linacs have higher operating frequencies? Why for superconducting linacs pulsed operation presents additional problems than CW operation? What are these problems? Is it always convenient to try increasing the accelerating gradient of a normal-conducting linac up to the breakdown limit? Why? What do you need to do in order to operate your NC linac structure at very high gradient (for example, 2.5 Kilpatrick peak surface field)? Questions lecture 3 MV

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