Istituto Nazionale di Fisica Nucleare (Italy) Linac 10-Tsukuba A.Pisent RFQ for cw applications

Questions

1. What is the field of application of Radio Frequency Quadrupoles?

2. Why for RFQ it is convenient to focus transversally with an electric field?

3. What is the modulation factor m and which is the effect to encrease it?

4. Why in a RFQ it is possible to bunch the beam with a very high efficiency?

5. Why at higher energy it is convenient to increase the intervane voltage along the RFQ?

6. Why an RFQ in the case of negligible space charge can be shorter?

7. For an RFQ (already in operation) by increasing the voltage, how does the output energy change (in first approximation)?

8. If during the design the input energy is decreased, what happens to the RFQ length (for similar bunching law)?