Test results of the prototype combined sextupole-dipole corrector magnet for LHC

Ijspeert, A.; Perin, R.; Walckiers, L.; Baynham, E.; Clee, P.; Coombs, R.; Begg, M.; Landgrebe, D.

doi:10.1109/77.233818

Cited by 5 publications

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“…Already in the period of prototyping [3], it was noticed that the training curve could often be matched with a power function of the type I n = I 1 *n p (1) where "I" is the quench current, I 1 the current of the first quench, "n" the number of the quench in a sequence, and the exponent "p" a constant which seemed to be about 0.2. Such a power curve forms a natural choice because re-written as…”

Section: The Shape Of the Training Curvesmentioning

confidence: 99%

“…These magnets had the peculiarity that the dipole coil was assembled around the sextupole coil and impregnated together [3] as a nested construction. After training one of the coils to a certain current, the training of the other started at a current level corresponding to the same longitudinal force, pointing to a relation between the longitudinal force or strain, and the training.…”

Section: Suspicion Concerning the Longitudinal Stressmentioning

confidence: 99%

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What is Common in the Training of the Large Variety of Impregnated Corrector Magnets for the LHC

Ijspeert¹,

Kate²

2004

AIP Conference Proceedings

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The Large Hadron Collider (LHC) will be equipped with about 5000 superconducting corrector magnets of 10 different types, ranging from dipoles through quadrupoles, sextupoles and octupoles to decapoles and dodecapoles. Four wires are used with 2 copper/superconductor ratios. Magnet lengths range from 0.15 m to 1.4 m. However, the magnets are all epoxy-impregnated and wound with enameled monolithic wires. The paper highlights the features that are common in the training of all these different magnets and uses that to give some clues for the possible origin of the training. ABSTRACTThe Large Hadron Collider (LHC) will be equipped with about 5000 superconducting corrector magnets of 10 different types, ranging from dipoles through quadrupoles, sextupoles and octupoles to decapoles and dodecapoles. Four wires are used with 2 copper/superconductor ratios. Magnet lengths range from 0.15 m to 1.4 m. However, the magnets are all epoxy-impregnated and wound with enameled monolithic wires. The paper highlights the features that are common in the training of all these different magnets and uses that to give some clues for the possible origin of the training.

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Section: The Shape Of the Training Curvesmentioning

confidence: 99%

Section: Suspicion Concerning the Longitudinal Stressmentioning

confidence: 99%

What is Common in the Training of the Large Variety of Impregnated Corrector Magnets for the LHC

Ijspeert¹,

Kate²

2004

AIP Conference Proceedings

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Status of the Large Hadron Collider magnet development

Perin¹

1994

IEEE Trans. Magn.

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13th Intemational Conference on Magnet Technology (MT13), Victoria, Canada, and ready for testing.seven full size dipoles is well advanced and two prototype quadrupoles are completed showing no adverse effects of the twin-aperture configuration. Fabrication in industry of validity of two major technical choices by behaving perfectly in superfluid helium and quenches well above the LHC required field. A 10 m long prototype confirmed the dipole model reached the record field of 10.51 T and after thermal cycling had all R & D for the LHC high field magnets is now approaching its goals. The last short the two beams placed in a common yoke and cryostat. magnets will all be of the twin-aperture configuration, i.e. with the magnetic channels for 8.65T and 600, 3.2 m long quadrupoles of 220 T/m gradient will be used. These main elements. For the regular arcs of the machine 1300, 13.5 m long dipole magnets of 10'000 superconducting magnetic units, including main magnets and correction Large Electron-Positron Collider (LEP). The LHC will require in total about Hadron Collider (LHC), which will be installed in the existing 27 km tunnel of the CERN is preparing the construction of a new particle accelerator-collider, the Large collider components.of the main dipoles is now 8.65 T for a proton beam energy installed in the 27 km long LEP tunnel, above the LEP units extended from 9 m to 13.145 m. The operational field advanced technology superconducting magnets which will be Q1 50 mm to ¤ 56 mm and the magnetic length of the dipoleThe new machine will mainly consist of a double ring of teristics [5]. The coil aperture has been increased from (LEP) at up to 1.3 TeV centre-of-mass energy. cost has recently led to some changes in the magnet charac with the elecuons of the Large Electron Posiuon Collider points of view of beam stability, operational reliability and will be a unique possibility of colliding high energy protons together with a re-optimization of the machine from the A review of the requirements of the physics experiments with 8 1umm¤sny ot 1.8 X 1027 cm·2 $-1. in addition, there training.centre-of-mass collision energy will be up to about 1150 TeV construction to prevent premature quenches and limit Heavier ions can also be collided; e.g. for lead (Pb) ions the and requires extreme care in the force-retaining mechanical will reach 14 TeV with a luminosity of 10cms 34 "2 '] conductors, such as those originating from sudden motion, planned facilities. For protons the head-on collision energy larly sensitive to quasi-adiabatic heat development in the luminosity higher than that attained in other existing or stored electromagnetic energy, makes the magnets particu collide at higher energies than ever achieved before and with bined with the high forces, proportional to BL, and the high gated with a short dipole model under construction [7], but with the magnetic channels for the two beams placed in a was successfully built and tested [6], is still being investi main magnem will all be of the twin-aperture configuratio...

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Status of LHC programme and magnet development

Perin

1995

IEEE Trans. Appl. Supercond.

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The Large Hadron Collider (LHC) is a superconducting acceleratodcollider for protons, heavy ions and electron-proton collisions in the multi-TeV energy range, which will be installed at CERN in the 27 km tunnel of LEP. This new facility will mainly consist of a double ring of high field superconducting magnets operating in superfluid helium at the temperature of 1.9 K. To reach the wanted beam energy (7 TeV for protons) the main dipole magnets will operate at about 8.4 T and the quadrupoles at 220 T/m field gradient. These main magnets have a two-in-one configuration with the magnetic channels for the two beams placed in a common yoke and cryostat.The LHC will have more than 10'000 superconducting magnetic units. The arcs of the machine will require about 1250,14 m long dipoles and 400,3 m long quadrupoles.After a general outline of the project with more detailed information on the design of the magnets, the paper describes the state of magnet R&D and presents results of short models, among which one reached the record dipole field of 10.5 T, as well as of industry made full scale prototypes which have been successfully tested and measured.

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Test results of the prototype combined sextupole-dipole corrector magnet for LHC

Cited by 5 publications

References 3 publications

What is Common in the Training of the Large Variety of Impregnated Corrector Magnets for the LHC

What is Common in the Training of the Large Variety of Impregnated Corrector Magnets for the LHC

Status of the Large Hadron Collider magnet development

Status of LHC programme and magnet development

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