The goal of phase 2 is to achieve a continuous 2 Amp DC electron beam. This will be a significant accomplishment not only for
Free-electron Lasers, but may demonstrate technology useful in other areas such as
proton/antiproton cooling.
Illustration of the Phase 2 experiment
The Phase 2 beam optics configuration consists of a drift tube and quadrupole triplet to
symmetrically return the beam to the decelerator tube. The philosophy behind the Phase 2 experiment is to address the formidable
challenges to achieving DC beam operation without the complications imposed by the FEL.
29-Jan-97 Beam is currently at 2.0A, 1.8 MV, 4 milliseconds, 99.972 % recirculation. Energy storage capacitors and current limiting resistors have been added to gun cathode level deck.
7-Jan-97 Beam is currently at 2.0A, 1.8 MV, 400 micro-sec., >99% recirculation (uncalibrated). Pulser and control system
software have been modified to operate in a long pulse/DC mode.
7-Dec-96 Beam is currently at 0.8A, 1.8 MV, 25 micro sec., >99% recirculation (uncalibrated). Current is low because a voltage limiter has temporarily kept us from flashing the cathode.
17-Nov-96 Extensive filtering and shielding of all electrical connections to accelerator have been completed - CAMAC modules now operate free of interference from arcs.
18-Aug-96 All terminal and ground potential electronics is installed (a simple 400 V temporary collector supply is installed)
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[jpeg 58K] photo - 19-Aug-96