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Introduction
By utilizing four spare MBE dipoles one can build a twin chicane
(to introduce half- quarter-wavelength delay) at the end of the South Linac.
Furthermore, an extraction dump chicane, to deposit energy recovered beam,
needs to be installed, at the end of the South Linac. These two additions will
create noninvasively CEBAF with full scale Energy Recovery/Current Doubling capability.
For the first stage of the experiment - The Energy Recovery Experiment -
a twin chicane will be configured for half-wavelength delay. It will turn
the ordinary CEBAF into a single pass ERL (Energy Recovery Linac).
The beam will be accelerated in the North and South Linac, then it will
get decelerated in the North and South Linac (one pass up, one pass down,
beam extracted at the injection energy, SL dump).
The second stage - The Current Doubling Experiment – requires a quarter-wavelength
delay chicane (appropriate reconfiguration of the twin chicane) and the same dump;
both at the end of the South Linac. The beam will be accelerated in the North and
South Linac, then it will drift through the North and South Linac, and it will
finally be decelerated in the North and South Linac (one pass up, one pass drift,
one pass down, beam extracted at the injection energy, SL dump).
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