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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Bonthond, J. Ducimetiere, L. Faure, P. Vossenberg, E.B. |
| Copyright Year | 2001 |
| Description | Author affiliation: CERN, Geneva, Switzerland (Bonthond, J.; Ducimetiere, L.; Faure, P.; Vossenberg, E.B.) |
| Abstract | Horizontal deflection of the beam in the dump kicker system of the CERN SPS accelerator is obtained with a series of fast pulsed magnets. The high current pulses of 50 kA per magnet are generated with capacitor discharge type generators which, combined with a resistive freewheel diode circuit, deliver a critically damped half-sine current with a rise-time of 25 /spl mu/s. Each generator consists of two 25 kA units, connected in parallel to a magnet via a low inductance transmission line. Originally the pulse generators were equipped with ignitron switches. Unfortunately ignitron switches suffer sporadically from self-firing. In addition these mercury filled devices present a serious danger of environmental pollution in case of an accident. Since the development of new power semiconductor devices now offers an alternative, replacement of the ignitron switches was decided. A suitable semiconductor switch was developed with the same dimensions as the ignitron and compatible with its trigger unit. It consists of a stack of four Fast High Current Thyristor (FHCT) devices with snubber capacitors, a voltage divider and a specially designed trigger transformer. This paper gives a description of the circuit and the construction of the switches, together with measurement results, which were found to be in good agreement with simulation results. |
| Sponsorship | Plasma Sci. & Appl. Committee Pulsed Power Sci. & Technol. Committee of the IEEE Nucl. & Plasma Sci. Soc |
| Starting Page | 1035 |
| Ending Page | 1038 |
| File Size | 206187 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780371208 |
| DOI | 10.1109/PPPS.2001.1001720 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2001-06-17 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Power semiconductor switches Pulse generation Structural beams Capacitors Particle beams Accelerator magnets Pulse circuits Semiconductor diodes Magnetic circuits Inductance |
| Content Type | Text |
| Resource Type | Article |
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