RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field...
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Transcript of RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field...
![Page 1: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/1.jpg)
RFQ Matcher
![Page 2: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/2.jpg)
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?
![Page 3: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/3.jpg)
Matcher Geometry
Plane vanes Matcher On
![Page 4: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/4.jpg)
Matcher E-field
Plane vanes Matcher On
![Page 5: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/5.jpg)
First three modes’ B-fields
![Page 6: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/6.jpg)
First three modes’ E-fields
![Page 7: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/7.jpg)
Mode Frequencies: Matcher On/Off
![Page 8: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/8.jpg)
Cold Model Field Flatness
![Page 9: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/9.jpg)
Four Metre RFQ Field Flatness
![Page 10: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/10.jpg)
Variation of Finger Length
10mm diameter fingers of varying length15mm in x and y from beam axis
![Page 11: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/11.jpg)
Variation of Finger Position
10mm diameter, 80mm long fingersVary finger distance from beam axis
![Page 12: RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.](https://reader035.fdocuments.in/reader035/viewer/2022070307/551ae4da55034606048b5b19/html5/thumbnails/12.jpg)
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!