Presentation on theme: "RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How."— Presentation transcript:
What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How much do they affect bulk 4m RFQ?
Matcher Geometry Plane vanes Matcher On
Matcher E-field Plane vanes Matcher On
First three modes’ B-fields
First three modes’ E-fields
Mode Frequencies: Matcher On/Off
Cold Model Field Flatness
Four Metre RFQ Field Flatness
Variation of Finger Length 10mm diameter fingers of varying length 15mm in x and y from beam axis
Variation of Finger Position 10mm diameter, 80mm long fingers Vary finger distance from beam axis
Conclusion Matcher does make large scale differences Modulations will do the same Need to stop using plane-vane models End fingers help, but need to pay attention to field flatness Leads to complicated tuning!