IBIC2017 - List of Authors (Clarke, C.I.)

Paper	Title	Page
TH1AB2	Beam Containment and Machine Protection for LCLS-2	478
	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
	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.
	Slides TH1AB2 [4.182 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TH1AB2
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Beam Containment and Machine Protection for LCLS-2

478

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

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.

Slides TH1AB2 [4.182 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TH1AB2

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)