Discussion
Status of pre-project elements:
Photoinjector improvements
Injector design:
- Some progress on agreement between model and experiment
- More work on modelling and understanding of energy spread required before we can perform detailed design work on a new injector. Also depends on the gun we will use.
- 3-bunch operation could be tested with a split Mizar beam (with Alcor as first bunch)
Gun test stand:
- Rasmus and Thomas will get together for a first rough outline.
- The test stand should also address the question of how to handle three bunches in the machine
- This test stand could also profit from R'Equip, but on a later timescale.
- Possible contribution from CHART (the gun test stand could be useful for high-bunch-charge operation as required for FCC-ee) (Paolo)
6-GeV Test Stand in Porthos arm
- R'Equip proposal to be submitted next spring. Requires survey of potential users.
- Main problem now is availability of installation time and manpower during SLS-2.0 construction phase.
Advanced Acceleration
- Promising recent results from colinear wakefield acceleration experiment with dechirper.
- Using such a wakefield accelerated witness bunch for lasing is technically conceivable, but still requires a lot of development - most likely beyond the timescale of Porthos. But addressing some of the open questions in the framework of the Porthos pre-project may make sense.
Choice of undulator type and configuration, synergy between Aramis and Porthos
- Marco Calvi on vacation, we wait for his assessment of helical SCU and SCAPE afterburner as candidates for Porthos.
- Hard to reconcile all experimental requests with the existing boundary conditions. We should get back to the users and request a prioritization of their wish list... how important is it to reach 25 keV photon energy?
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