IBIC2015 - List of Authors (Lidia, S.M.)

Paper	Title	Page
MOPB070	FRIB Machine Protection System Design and Validation Studies	221
	S.M. Lidia, M. Ikegami, Z. Li, Z. Liu, T. Russo, R.C. Webber, Y. Zhang, Q. Zhao FRIB, East Lansing, Michigan, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. The FRIB heavy ion superconducting linac will present the highest peak power hadron beam facility, with beams carrying >400 kW power with kinetic energy >200 MeV/u. Fast protection systems are required to detect and remove beam within 35 us. Detection of beam losses in the low energy linac segment is confounded by two effects: small fluxes of secondary radiation from beam impacts, and large fluxes due to cross-talk from neighbouring, higher energy linac sections. We describe a machine protection scheme based on multiple families of diagnostics and diagnostic networks. On-going fault mode studies are utilised to assess risk and to assist in the definition of specific detection networks for high reliability and responsivity.
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MOPB071	Overview of Beam Diagnostic Systems for FRIB	226
	S.M. Lidia, S. Cogan, D. Constan-Wahl, J.L. Crisp, M. Ikegami, Z. Liu, F. Marti, I.N. Nesterenko, G. Pozdeyev, T. Russo, R. Shane, R.C. Webber, Y. Zhang, Q. Zhao FRIB, East Lansing, Michigan, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. The Facility for Rare Isotope Beams will extend the intensity frontier of heavy ion linac facilities, with continuous beam power up to 400 kW and beam energy ≧200 MeV/u. Strict demands are placed on the beam diagnostics in the front end, linac, and beam delivery systems to ensure delivery of high quality beams to the target with minimal losses. We describe the design of diagnostic systems in each accelerator sector for commissioning and operations.
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MOPB073	Cryogenic Thermometers as Slow Beam Loss Detectors	231
	Z. Zheng, Z.Q. He, S.M. Lidia, Z. Liu, R. Shane, Y. Zhang FRIB, East Lansing, Michigan, USA
	Due to the folded geometry of the linac, beam loss monitoring at the Facility for Rare Isotope Beams (FRIB) [1], especially for small losses, is extremely challenging in the low energy section of the linac. Fast detection is not required for slow/small beam losses, and we therefore propose thermometers installed in the cryomodules at potential hot spots, such as the locations upstream of solenoids. Cryogenic thermometry tests were implemented in the ReA6 cryomodule with heaters and RTD thermometers. The preliminary study shows that the 10 mK signal resolution of thermometers corresponds to ~5 mW heat power in 100 seconds, or ~1 W heat power in 10 seconds, which is sufficient to satisfy the requirement for small beam loss at FRIB.
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Paper

Title

Page

FRIB Machine Protection System Design and Validation Studies

221

S.M. Lidia, M. Ikegami, Z. Li, Z. Liu, T. Russo, R.C. Webber, Y. Zhang, Q. Zhao
FRIB, East Lansing, Michigan, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
The FRIB heavy ion superconducting linac will present the highest peak power hadron beam facility, with beams carrying >400 kW power with kinetic energy >200 MeV/u. Fast protection systems are required to detect and remove beam within 35 us. Detection of beam losses in the low energy linac segment is confounded by two effects: small fluxes of secondary radiation from beam impacts, and large fluxes due to cross-talk from neighbouring, higher energy linac sections. We describe a machine protection scheme based on multiple families of diagnostics and diagnostic networks. On-going fault mode studies are utilised to assess risk and to assist in the definition of specific detection networks for high reliability and responsivity.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

MOPB071

Overview of Beam Diagnostic Systems for FRIB

226

S.M. Lidia, S. Cogan, D. Constan-Wahl, J.L. Crisp, M. Ikegami, Z. Liu, F. Marti, I.N. Nesterenko, G. Pozdeyev, T. Russo, R. Shane, R.C. Webber, Y. Zhang, Q. Zhao
FRIB, East Lansing, Michigan, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
The Facility for Rare Isotope Beams will extend the intensity frontier of heavy ion linac facilities, with continuous beam power up to 400 kW and beam energy ≧200 MeV/u. Strict demands are placed on the beam diagnostics in the front end, linac, and beam delivery systems to ensure delivery of high quality beams to the target with minimal losses. We describe the design of diagnostic systems in each accelerator sector for commissioning and operations.

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

MOPB073

Cryogenic Thermometers as Slow Beam Loss Detectors

231

Z. Zheng, Z.Q. He, S.M. Lidia, Z. Liu, R. Shane, Y. Zhang
FRIB, East Lansing, Michigan, USA

Due to the folded geometry of the linac, beam loss monitoring at the Facility for Rare Isotope Beams (FRIB) [1], especially for small losses, is extremely challenging in the low energy section of the linac. Fast detection is not required for slow/small beam losses, and we therefore propose thermometers installed in the cryomodules at potential hot spots, such as the locations upstream of solenoids. Cryogenic thermometry tests were implemented in the ReA6 cryomodule with heaters and RTD thermometers. The preliminary study shows that the 10 mK signal resolution of thermometers corresponds to ~5 mW heat power in 100 seconds, or ~1 W heat power in 10 seconds, which is sufficient to satisfy the requirement for small beam loss at FRIB.

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)