This page is going to be a 'whiteboard' where we can write the advantages of 1.3GHz and 3GHz RF on either side (just e-mail comments to a webmaster and they'll add them).
In favour of 1.3GHz
- More turns possible with a lower frequency, so can study resonance crossing in more detail.
- This is the frequency used for TESLA (and ERLP, the Daresbury injector).
- Can also use the 'linear RF distribution' technology developed for TESLA.
- The lower frequency can achieve a larger acceleration range with a smaller ring.
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In favour of 3GHz
- Eberhard Keil's lattices currently use this frequency.
- Technology for this is also well-developed at CERN.
- Smaller waveguides reduce cost of RF delivery.
- Could possibly fit multi-cell (2 or 3) cavities into one drift.
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Conclusion from meeting on Friday 14th January is that we will assume 1.3GHz will be used for now, pending the results of comparative costing of the two.
A cost estimate for the 1.3GHz RF system is now available!