Abstract: A new type of fast beam chopper is developed and tested. The chopper is basically a periodic beam energy transformer which performs 10% modulation of beam’s kinetic energy. The modulated fraction of the beam is chopped off by a downstream RFQ due to the relatively narrow injection energy window of the RFQ. The chopper uses magnetic-alloy cores and a fast highvoltage transistor switch in order to produce output voltage pulses with short rise- and fall-time and a good flat-top. The chopper system, that includes a chopper cavity and a pulsed power supply, is installed at the HIMAC facility. Test operations so far demonstrate that an efficient chopping can be obtained with this type of chopper. Capture experiments of the chopped beam at the HIMAC main-ring, as well as improvements of the chopper power supply, are on the way.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
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Cited By Count: 2
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