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in subjects: "Superconducting Devices 430400* -- Particle Accelerators-- Storage Rings"  
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Alternative dipole magnets for ISABELLE

Description: A dipole magnet, intended as a possible alternative for the ISABELLE main-ring magnet, was designed at LBL. Three layers of FNAL Doubler/Saver conductor were used. Two 1.3-m-long models were built and tested, both with and without an iron core, and in both helium I and helium II. The training behavior, cyclic energy loss, point of quench initiation, and quench velocity were determined. A central field of 6.5 tesla was obtained in He I (4.4 K), and 7.6 tesla in He II (1.8K).
Date: May 1, 1982
Creator: Taylor, C.; Althaus, R.; Caspi, S.; Gilbert, W.; Hassenzahl, W.; Meuser, R. et al.
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Partner: UNT Libraries Government Documents Department
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Dipole aperture and superconductor requirements

Description: The cost of an accelerator is not proportional to the aperture. A change in aperture by a certain percentage results in an overall accelerator cost change by only a fraction of that percentage; the fraction may be between 0.1 and 0.5 and is almost independent of the bending field. This estimate is obtained by analyzing the superconductor requirements as a function of aperture and by making rough estimates of the largest cost items of the accelerator such as magnets and ring tunnel.
Date: December 11, 1983
Creator: Wipf, S.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ISABELLE magnets. A brief description

Description: The modified ISABELLE dipole design, adopted in the fall of 1981, is briefly described, and the assembly procedure and performance of initial prototype magnets summarized. The new magnets incorporate a cabled superconductor wound in a two-layer coil configuration, supported by a laminated split iron yoke. In all cases the prototype magnets reach short sample performance on the first quench, and exhibit virtually no training; eddy current effects are negligible as well.
Date: January 1, 1982
Creator: Dahl, P.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proton-proton colliding beam facility ISABELLE

Description: This paper attempts to present the status of the ISABELLE construction project, which has the objective of building a 400 + 400 GeV proton colliding beam facility. The major technical features of the superconducting accelerators with their projected performance are described. Progress made so far, difficulties encountered, and the program until completion in 1986 is briefly reviewed.
Date: January 1, 1980
Creator: Hahn, H
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Partner: UNT Libraries Government Documents Department
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Window frame or ''superferric'' magnet design for low B(<3T) heavy ion storage ring study

Description: Double magnets share common laminations without magnetic coupling. Single layer coils of rectangular conductor are dry wound on extruded bore tubes. Magnet construction requires no molding or prestress. Absence of superconducting (SC) magnetization fields in the aperture results in very large dynamic range. The coil is wound continuously across the modplane to give unusually large dynamic aperture. Above approx.2.2 T saturation is corrected by simple sextupole windings with no inductive couplin… more
Date: January 1, 1985
Creator: Danby, G.; DeVito, B.; Jackson, J.; Keohane, G., Lee, Y.; Phillips, R.; Plate, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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6. 4 tesla dipole magnet for the SSC. Revision

Description: A design is presented for a dipole magnet suitable for the proposed SSC facility. Test results are given for model magnets of this design 1 m long and 4.5 m long. Flattened wedge-shaped cables (''keystoned'') are used in a graded, two-layer ''cos theta'' configuration with three wedges to provide sufficient field uniformity and mechanical rigidity. Stainless steel collars 15 mm in radial depth, fastened with rectangular keys, provide structural support, and there is a ''cold'' iron flux return.… more
Date: August 1, 1985
Creator: Taylor, C.E.; Caspi, S.; Gilbert, W.; Hassenzahl, W.; Meuser, R.; Mirk, K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compact electron storage rings

Description: There have been many recent developments in the area of compact storage rings. Such rings would have critical wavelengths of typically 10 A, achieved with beam energies of several hundreds of MeV and superconducting dipole fields of around 5 Tesla. Although the primary motivation for progress in this area is that of commercial x-ray lithography, such sources might be an attractive source for college campuses to operate. They would be useful for many programs in materials science, solid state, x… more
Date: January 1, 1987
Creator: Williams, G. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heat-load measurement of prototype cryogenic magnets and leads for the ISABELLE project

Description: A major feature in the cryogenic system development program for ISABELLE is the measurement of the heat loads of prototypical hardware. In particular, superconducting magnet assemblies, magnet power leads and magnet power lead vessels have been measured. In each of these cases it has been possible to build equipment which has a heat load equal to or less than the allowance for it in the heat load budget.
Date: January 1, 1981
Creator: Werner, A. P.; Brown, D. P. & Schneider, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MAGCOOL: the production cooling facility for ISABELLE magnets

Description: The ISABELLE proton accelerator uses over one thousand superconducting magnets to guide the particle beams in two circular rings, 3.8 km in circumference. Prior to their installation in the tunnel all magnets must be tested and measured at their 3.8 K operating temperature. This paper describes the refrigeration system, called MAGCOOL, to accomplish this task.
Date: January 1, 1981
Creator: Bamberger, J. A.; Afrashteh, M.; Brown, D. P.; Schneider, W. J.; Sondericker, J. H. & Wu, K. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Magnetic field measurements of superconducting magnets for the colliding beam accelerator

Description: An important aspect of the development and production of superconducting magnets for the Colliding Beam Accelerator is the measurement of the magnetic field in the aperture of these magnets. The measurements have the three-fold purpose of determining the field quality as compared to the lattice requirements of the CBA, of obtaining the survey data necessary to position the magnets in the CBA tunnel, and lastly, of characterizing the magnetic fields for use in initial and future orbit studies of… more
Date: January 1, 1983
Creator: Herrera, J.; Kirk, H.; Prodell, A. & Willen, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Helium-flow measurement using ultrasonic technique

Description: While designing cryogenic instrumentation for the Colliding Beam Accelerator (CBA) helium-distribution system it became clear that accurate measurement of mass flow of helium which varied in temperature from room to sub-cooled conditions would be difficult. Conventional venturi flow meters full scale differential pressure signal would decrease by more than an order of magnitude during cooldown causing unacceptable error at operating temperature. At sub-cooled temperatures, helium would be pumpe… more
Date: January 1, 1983
Creator: Sondericker, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design of 24. 8-kW, 3. 8 K cryogenic system for ISABELLE

Description: ISABELLE will consist of two proton accelerator/storage rings in a common tunnel. There will be 1084 superconducting magnets installed in the 3.8 km circumference tunnel. The protons will be accelerated to an energy of 400 GeV in each ring and stored for 24 hours. The two beams are counter-rotating and intersect at six places around the ring. The particles which emerge from proton interactions at these intersecting points are studied using various types of detectors.
Date: January 1, 1981
Creator: Brown, D. P.; Afrashteh, M.; Bamberger, J. A.; Fresco, A.; Schlafke, A. P.; Schneider, W. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Correction of the field in the SSC dipoles using superconductor on the wedges

Description: The SSC colliding beam storage ring requires superconducting magnets capable of producing a magnetic field of 6.6 T which has very high accuracy. For many of the multipoles, that multipole must be reduced (at a radius of 1 centimeter) to the order of 0.2 parts in 10,000. This field accuracy is dictated by the physics of storing very small high-current proton beams at energies ranging from 1 TeV to 20 TeV. Magnetization of the superconductor can cause sextupole field errors of up to 6 parts in 1… more
Date: September 1, 1987
Creator: Green, M. A. & Talman, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial Estimate of Transmission Line Effects in SSC Design D Magnets

Description: The response of the SSC accelerator magnet string to transient excitation from the power supply is considered. Some criteria for the selection of the optimum damping resistors for the SSC magnets are discussed. Once the damping resistors are chosen, the transient response of the load to power supply transients, including the effect of the power supply filter is analyzed. A comparative analysis is made of the differences between two possible configurations in the distribution of the magnets (wit… more
Date: December 1, 1985
Creator: Calvo, O. & Tool, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of cooldown performance for ISABELLE helium refrigerator

Description: The ISABELLE refrigerator was designed to provide cooling for 1000 superconducting magnets. It has the dual duty of providing cooling at steady-state operating conditions and to cooldown massive magnets from ambient temperature. During the cooldown, tremendous quantities of heat (approx. 4.8 x 10/sup 11/ J) must be removed from the magnets (5.9 x 10/sup 9/ gm of iron) and 75,000 liters of cold helium must be supplied to fill the system. In the planning for ISABELLE, this procedure has been esti… more
Date: January 1, 1981
Creator: Wu, K. C.; Brown, D. P. & Moore, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cycle design for the ISABELLE helium refrigerator

Description: The superconducting magnets for the ISABELLE storage ring/accelerator are designed to be operated at 3.8/sup 0/K using a forced-flow supercritical helium cooling system. The ISABELLE refrigerator has been designed subject to these special requirements. The design output is 13.65 KW of refrigeration below 4.2/sup 0/K (for cooling the magnet and distribution system), 55 KW at 55/sup 0/K (to cool heat shields for the whole system) and 100 g/s of liquefaction (for magnet power leads cooling). The s… more
Date: January 1, 1981
Creator: Brown, D. P.; Schlafke, A. P.; Wu, K. C. & Moore, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Review of TAC superferric magnet

Description: The studies reported here include conductor current level optimizations at 0.15 T, 2.0 T, 3.0 T, and 3.25 T, maximum conductor fields at 3.25 T, sensitivity of field quality to variations in the magnetic shunt, and effects of up-down asymmetries. This design is characterized by a magnetic shunt which separates the aperture from the primary coils. The current in the three coils, labeled I/sub c'/ I/sub in'/ and I/sub out'/ may be individually controlled. Two configurations of the trim coil, labe… more
Date: September 3, 1985
Creator: Marks, S. & Humphries, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Performance characteristics of ISABELLE with Fermilab magnets

Description: If ISABELLE were to be built with FNAL magnets instead of the BNL magnets (or some other large-aperture variant), the luminosity in Phase I would be down from the standard value by a factor of around 10 to 2.3 x 10/sup 31/, which is still a very respectable figure with which one could surely do a great deal of interesting physics. Adding a booster (Phase II) would restore the performance to the level originally planned. Intermediate performance could be obtained by alternate injection schemes r… more
Date: January 1, 1981
Creator: Courant, E. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ISABELLE magnet power supply system performance analysis

Description: The power supply system that will energize the superconducting magnets in the ISABELLE 400 x 400 GeV accelerator must supply various voltages and currents. The voltages for the correction winding range from ten to one hundred twenty-five volts unipolar and bipolar with current rating of 50 to 300 amperes. The main field winding requires voltages from 90V (at flattop) to 600V during maximum ramp rate or acceleration cycle. The power supplies are programmable over their full range of output curre… more
Date: January 1, 1981
Creator: Edwards, R.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ISABELLE: a progress report

Description: This paper discusses the ISABELLE project, which has the objective of constructing a high-energy proton colliding beam facility at Brookhaven National Laboratory. The major technical features of the intersecting storage accelerators with their projected performance are described. Application of over 1000 superconducting magnets in the two rings represents the salient characteristic of the machine. The status of the entire project, the technical progress made so far, and difficulties encountered… more
Date: January 1, 1980
Creator: Hahn, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quench propagation and training in simulated superconducting magnet windings

Description: Training behavior similar to that which occurs in full scale superconducting accelerator magnets has been observed in small test windings. The test coils are formed from approximately 20 meters of conductor wound non-inductively, in Bifilar fashion. The resulting racetrack shaped coil is molded at elevated temperature to simulate the construction techniques used for the ISABELLE dipoles. The quench current of such windings has been measured as a function of applied field and the effect of param… more
Date: January 1, 1981
Creator: Sampson, W.B.; Garber, M. & Ghosh, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiation heating from beam loss on ISABELLE ejection septa

Description: It is anticipated that radiation heating due to beam loss may place severe constraints on the operation of high energy accelerators which utilize superconducting magnets. Losses on ejection septa, assuming an unbunched beam mode of operation, are unavoidable and have direct impact on the design of the extraction system. Calculations of energy deposition densities downstream of ISABELLE ejection septa have been made using a modified version of the hadron cascade Monte Carlo computer program CASI… more
Date: January 1, 1981
Creator: Stevens, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Magnetic properties of ISABELLE superconducting quadrupoles

Description: A number of superconducting quadrupole magnets have been constructed in the ISABELLE project during the past year. With these quadrupoles, it was intended to test construction techniques, magnet performance and measuring capability in an effort to arrive at a quadrupole design satisfactory for use in the storage ring accelerator. While these magnets are designed to have dimensions and field properties close to those needed for regular cell ISABELLE quadrupoles, no effort was made to make them i… more
Date: January 1, 1981
Creator: Willen, E; Engelmann, R; Greene, A F; Herrera, J; Jaeger, K; Kirk, H et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of magnetic non-linearities on a stored proton beam and their implications for superconducting storage rings

Description: A nonlinear lens may be used to study the effect of high-order multipolar field imperfections on a stored proton beam. Such a nonlinear lens is particulary suitable to simulate field imperfections of the types encountered in coil dominated superconducting magnets. We have studied experimentally at the SPS the effect of high order (5th and 8th) single isolated resonances driven by the nonlinear lens. The width of these resonances is of the order one expects to be caused by field errors in superc… more
Date: June 1, 1985
Creator: Cornacchia, M. & Evans, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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