Quench thresholds in operational superconducting magnets

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6277552

Allinger, J; Danby, G; Foelsche, H; Jackson, J; Lowenstein, D; Prodell, A; Weng, W

Superconducting magnets exposed to intense primary proton beams in high energy physics applications are subject to potentially extreme heat deposition. The beam power density, its duration and spatial distribution, the current density in the superconductor and, potentially, in the normal metal substrate, as well as the construction and cooling details of the magnet, are all relevant parameters. An extension of some earlier work is discussed in which 28.5 GeV/c proton beams with up to 50 k joules of energy were targeted upstream from a 4 m long, 4 T dipole magnet used to deflect the protons through an angle of 8/sup 0/. Quench thresholds much greater than the enthalpy limit of the magnet materials were observed. In the beam exposure experiment described, intense beams of 1.5 GeV/c protons have been deflected directly into the magnet coil at relatively steep angles of incidence. The magnet quench threshold was studied by varying the beam currents and beam sizes.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6277552
• Report Number(s): BNL-25121; CONF-780952-44
• Country of Publication: United States
• Language: English

Related Subjects

420201 -- Engineering-- Cryogenic Equipment & Devices
43 PARTICLE ACCELERATORS
430100 -- Particle Accelerators-- Design
Development
& Operation
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM DYNAMICS
BEAM FOCUSING MAGNETS
BEAMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENERGY TRANSFER
EQUIPMENT
HEAT TREATMENTS
HEATING
MAGNETS
NUCLEON BEAMS
PARTICLE BEAMS
PERFORMANCE
PROTON BEAMS
QUENCHING
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS