Doubler-tevatron μp quench protection system

Flora, R.; Tool, G.

doi:10.1109/tns.1979.4330066

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…Quench heaters constitute the core of the magnet protection system of the current LHC, and are used in other superconducting accelerators [30][31][32] as well as considered for potential future machines [33]. The QHs consist of resistive strips that are attached onto the magnet coil.…”

Section: Impact Of Magnet Protection Devices On the Beammentioning

confidence: 99%

Fast failures in the LHC and the future high luminosity LHC

Lindstrom

Belanger

Bortot

et al. 2020

Phys. Rev. Accel. Beams

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An energy of 362 MJ is stored in each of the two LHC proton beams for nominal beam parameters. This will be further increased to about 700 MJ in the future high luminosity LHC (HL-LHC) and uncontrolled beam losses represent a significant hazard for the integrity and safe operation of the machine. In this paper, a number of failure mechanisms that can lead to a fast increase of beam losses are analyzed. Most critical are failures in the magnet protection system, namely the quench heaters and a novel protection system called coupling-loss induced quench (CLIQ). An important outcome is that magnet protection has to be evaluated for its impact on the beam and designed accordingly. In particular, CLIQ, which is to protect the new HL-LHC triplet magnets, constitutes the fastest known failure in the LHC if triggered spuriously. A schematic change of CLIQ to mitigate the hazard is presented. A loss of the beam-beam kick due to the extraction of one beam is another source of beam losses with a fast onset. A significantly stronger impact is expected in the upcoming LHC Run III and HL-LHC as compared to the current LHC, mainly due to the increased bunch intensity. Its criticality and mitigation methods are discussed. It is shown that symmetric quenches in the superconducting magnets for the final focusing triplet can have a significant impact on the beam on short timescales. The impact on the beam due to failures of the beam-beam compensating wires as well as coherent excitations by the transverse beam damper are also discussed.

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Section: Impact Of Magnet Protection Devices On the Beammentioning

confidence: 99%

Fast failures in the LHC and the future high luminosity LHC

Lindstrom

Belanger

Bortot

et al. 2020

Phys. Rev. Accel. Beams

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Measured Control Characteristics of the Half-Cell 40mm Aperture Magnet String

et al. 1992

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The data presented here were obtained in the course of operating a five 40mm aperture' dipole string. The eighty eight meter long string of dipoles was assembled to test the various proposed operational scenarios of the SSCL collider. As reported earlier, 1 there had been a short control and system (data procurement) checkout run performed on an abbreviated two dipole string. The problems that were then uncovered with the exception of the high 20K shield heat load, were corrected. There has been over 5000 hours of running time on the system, 3000 hours on the five magnet string alone, and to date, no major problems or incidents have occurred. The quench (superconducting to normal transition) performance of the magnet string was excellent, with the exception of four premature quenches that occurred during power supply commissioning. The operational parameters were all found to be manageable or equal to or greater than design. The operational heat loads were within the budget with the exception of the 20K circuit which was a factor of three too high. The relative internal voltages of the magnets have been higher than previously measured in the shorter string by a significant amount. There will be a discussion of concerns and problems plus their possible solution.

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The Fermilab Saver/Collider and Future Options

1980

Experientia Supplementum

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Doubler-tevatron μp quench protection system

Cited by 6 publications

References 2 publications

Fast failures in the LHC and the future high luminosity LHC

Fast failures in the LHC and the future high luminosity LHC

Measured Control Characteristics of the Half-Cell 40mm Aperture Magnet String

The Fermilab Saver/Collider and Future Options

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