R. Meuser

Design of epoxy-free superconducting dipole magnets and performance in both Helium I and pressurized Helium II

LBL-12455 | H 1 Lawrence Berkeley Laboratory K J UNIVERSITY OF CALIFORNIA Accelerator & Fusion Research Division P r e s e n t e d a t t h e V l l t h I n t e r n a t i o n a l Conference on Magnet Technology, K a r l s r u h e , Germany, March 3 0 - A p r l l 3 , 1981 DESIGN OF EPOXY-FREE SUPERCONDUCTING DIPOLE MAGNETS AND PERFORMANCE IN BOTH HELIUM I AND PRESSURIZED HELIUM II C. Taylor, R. Althaus, S. Caspi, W. Gilbert, W. Hassenzahl, R. Meuser, J. Rechen, and R. Warren March 1S81 H T B n W O T I M » K T IS UIUMIIHI S m i a F H S Prepared for the U.S. Department ot Energy under Contract W-7405-ENG-48

Measured mechanical properties of superconducting coil materials and their influence on coil prestress

LBL-12438 r Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA Accelerator & Fusion Research Division Dc P r e s e n t e d a t t h e V l l t h I n t e r n a t i o n a l Conference on Magnet Technology, K a r l s r u h e , Germany, March 3 0 - A p r l l 3, 1981 MEASURED MECHANICAL PROPERTIES OF SUPERCONDUCTING COIL MATERIALS AND THEIR INFLUENCE ON COIL PRESTRESS Robert B. Meuser, Shlomo C a s p i , and W i l l i a m S. G i l b e r t TWO-WEEK LOAN COPY March 1981 This is a Library Circulating Copy which may be borrowed for two weeks. For a personal retention copy, call Tech. Info. Division, Ext. 67S2 Prepared for the U.S. Department of Energy under Contract W-7405-ENG-48

ESCAR Superconducting Magnet System

The ESCAR (Experimental Superconductinq Aqcelerator Ring) project has been described previously. , Twentyfour superconducting dipoles each about 1 meter long, provide the guide field for this proton acceleratorstorage ring. Injection of 50 MeV protons corresponds to a 3 kG central dipole field, and a peak proton energy of 4.2 GeV corresponds to a 46 kG central field. Thirtytwo quadrupoles provide focusing.

Design of a 10-T superconducting dipole magnet using niobium-tin conductor

LBL-14434 Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA I • Accelerator & Fusion Research Division Presented at the 1982 Applied Superconductivity Conference, Knoxville, TN, November 28-December 3, 1982; and to be published in the Proceedings DESIGN OF A 10-T SUPERCONDUCTING DIPOLE MAGNET USING NIOBIUM-TIN CONDUCTOR C. Taylor, R. Meuser, S. Caspi, W. Gilbert, W. Hassenzahl, C. Peters, R. Schafer, and R. Wolgast November 1982 Prepared for the U.S. Department of Energy under Contract DE-AC03-76SF00098

Performance of Dipole Magnets in Helium II

Data from tests in He II of four 1-meter-long magnets are presented. The maximum quench current is increased up to 30 percent, compared with tests in He I. Data from calorimetric measurements of heat generated during cyclic operation are presented. Quenches were induced by heaters placed near the conductor, and the energy required to induce quenches in He II and in He I are compared.

Prospects for 10T Accelerator Dipole Magnets

LBL-12456 0 Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA <Lr^-^ai4--ll7 Accelerator & Fusion Research Division Presented at the Particle Accelerator Conference, Washington, D.C., March 11-13, 1981 PROSPECTS FOR 10T ACCELERATOR DIPOLE MAGNETS C.E. Taylor and R.B. Heuser March 1981 MASTER Praparad for tha U.S. Department of Energy under Contract W-7405-ENG-4B

ESCAR mid-term report

A status report is given of the design and fabrication of a small pilot-project accelerator and storage ring using superconducting magnets. The project is called ESCAR, for Experimental Superconducting Accelerator Ring. Work is reported on a pre-production dipole magnet, a 1500W helium refrigeration plant, planned major systems tests, and conventional component development. (PMA)

Conceptual Magnet Design for an Iron-Free Colliding Beam Accelerator

Superconducting accelerator magnets usually have magnetic iron yokes to obtain maximum magnetic field and to limit stray field. However, the iron is expensive and heavy. The smaller size and weight of an iron-free magnet can result in lower magnet and refrigeration costs. However in a colliding beam accelerator the stray field from one ring produces aberrations in the field in the other. A way to eliminate this mutual interference is to surround each magnet with a coil that exactly cancels the field from the in the other ring magnet. That is expensive in terms of superconductor requirements. However the cancellation of the external dipole field component is unnecessary. Only a small amount of superconductor is required for cancellation of the higher-order field-aberration components. Parameters for the iron-free magnet concept are investigated, and a preliminary conceptual design for an accelerator is presented.

A four layer, two inch bore, superconducting dipole magnet

LBL-15372 Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA Accelerator & Fusion Research Division Presented at the 1982 Applied Superconductivity Conference, Knoxville, TN, November 28-December 3, 1982; and to be published in the Proceedings A FOUR LAYER, TWO INCH BORE, SUPERCONDUCTING DIPOLE MAGNET W.V. Hassenzahl, C. Peters, W. Gilbert, C. Taylor, and R. Meuser November 1982 Prepared for the U.S. Department of Energy under Contract DE-AC03-76SF00098

Items from the Construction of ESCAR

ESCAR is an experimental superconducting accelerator which is being built at Lawrence Berkeley Laboratory to gain timely, full-scale experience in the construction and operation of a fully cryogenic accelerator. A report is given of the construction of several non-conventional items.