[Bteam] two Comptons

[Matt Poelker]

Or just built (or buy) an short-pulsed RF laser.  Then the beamline 
aperture could be made a meter wide and all the locking could be done on 
the laser table: timing via rf phase lock, and position via 
piezo-electric steering mirror. 
Matt

Jay Benesch wrote:
> Some thoughts about low background and energy lock in two halls.
>
> 1. would it help to have a 25 keV copper energy lock cavity in parallel 
> with a slow lock on the arc dipole bus to keep xC12.XPOS constant on the 
> hall which doesn't have control of the SL20 vernier?
>
> 2. would the combination of energy lock and polarization benefit justify 
> the cost of a superconducting 499 MHz cavity at 4.5K with a recondenser 
> on the cryostat?  No cryo lines, just electricity and RF into the BSY.
>
> Jay
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Matt Poelker
Jefferson Lab
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