| Title |
Beam Containment and Machine Protection for LCLS-2 |
| Authors |
- A.S. Fisher, C.I. Clarke, R.C. Field, J.C. Frisch, R.T. Herbst, R.A. Kadyrov, B.D. McKee, F. Tao, J.J. Welch
SLAC, Menlo Park, California, USA
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| Abstract |
The first km of the 3-km SLAC linac is being replaced by LCLS-2, a superconducting linac with continuous RF and a maximum beam rate of 1 MHz. The beam will have an energy of 4 GeV and a maximum power of 250 kW, with an upgrade to 8 GeV and 1 MW in planning. The beam will be transported through the accelerator tunnel, passing over the future 1-km FACET-2 and the existing 1-km LCLS linacs, both using normal-conducting copper cavities at repetition rates of up to 120 Hz. The LCLS and LCLS-2 beams will continue together through the Beam Transport Hall to two new undulators, for hard and soft x rays. Kickers will direct individual pulses to either undulator or to a dump. The high power in the beam and potentially in cavity field emission necessitate integrating losses over 500 ms but responding within 0.1 ms. A capacitor for integration and a comparator for the threshold give a simple and robust approach over a wide dynamic range. We plan both long loss monitors covering regions of typically 100 m and point monitors. In regions with two or more beamlines, the system will attempt to determine the line that caused a loss, so that only one is shut off.
|
| Paper |
download TH1AB2.PDF [0.464 MB / 4 pages] |
| Slides |
download TH1AB2_TALK.PDF [4.182 MB] |
| Export |
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※ EndNote |
| Conference |
IBIC2017, Grand Rapids, MI, USA |
| Series |
International Beam Instrumentation Conference (6th) |
| Proceedings |
Link to full IBIC2017 Proccedings |
| Session |
Thursday Before Coffee |
| Date |
24-Aug-17 09:00–10:30 |
| Main Classification |
5 Beam Loss Detection and Machine Protection |
| Keywords |
ion, detector, linac, radiation, electron |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Zhengzheng Liu (FRIB, East Lansing, MI, USA); Steven Lidia (FRIB, East Lansing, MI, USA); Amy McCausey (FRIB, East Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-192-2 |
| Published |
March 2018 |
| Copyright |
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