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in creator/contributor: "Strait, J."

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Recent results from Mark II at SPEAR and PEP

Three results are presented: (1) The semi-leptonic branching ratio of the ..lambda../sub c/ has been measured at SPEAR to be B(..lambda../sub c//sup +/ ..-->.. e/sup +/X) = (4.5 +- 1.7)%. (2) Properties of tau-pair production have been measured at PEP at square root S = 29 GeV: sigma/sup tau tau//sigma/sup QED/ = 0.97 +- 0.05 +- 0.06; the forward-backward asymmetry is A/sub tau tau/ = (-3.5 +- 5.0)%; inclusive branching ratios are B(tau ..-->.. 1 Prong) = (86 +- 4)%, B(tau ..-->.. 3 Prongs) = (… more

Date: April 1, 1982

Creator: Strait, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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5cm aperture dipole studies

The results obtained during the evolution of the design, construction, and testing program of the design ''B'' dipole are presented here. Design ''B'' is one of the original three competing designs for the Superconducting Super Collider ''SSC'' arc dipoles. The final design parameters were as follows: air cored (less than a few percent of the magnetic field derived from any iron present), aluminum collared, two layered winding, 5.5T maximum operating field, and a 5 cm cold aperture. There have … more

Date: September 30, 1986

Creator: McInturff, A.D.; Bossert, R.; Carson, J.; Fisk, H.E.; Hanft, R.; Kuchnir, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Mechanical design and analysis of the 2D cross-section of the SSC collider dipole magnet

The 50 mm aperture collider dipole magnet uses stainless steel collars to position the conductors at the locations specified by the magnetic design and to prestress the coil to prevent conductor motion under excitation. The collars are supported by the vertically-split yoke and cold mass skin to reduce their deflection under excitation. The collar interior is designed to give the coil its required shape at the operating temperature taking into account all deflections that occur from assembly an… more

Date: May 1, 1991

Creator: Strait, J.; Kerby, J.; Bossert, R.; Carson, J. (Fermi National Accelerator Lab., Batavia, IL (USA)); Spigo, G. & Turner, J.R. (Superconducting Super Collider Lab., Dallas, TX (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Magnetic field measurements of Fermilab/General Dynamics built full scale SSC collider dipole magnets

This paper presents preliminary results of magnetic field measurements made on a series of 50 mm aperture 15 m long SSC collider dipole magnets designed and manufactured at Fermi National Accelerator Laboratory (Fermilab) for use in the Superconducting Super Collider Laboratory (SSCL) Accelerator System String Test. The magnets were assembled by Fermilab and General Dynamics personnel, and were tested at the Magnet Test Facility (MTF) at Fermilab. Measurements of the dipole field angle, dipole … more

Date: April 1, 1992

Creator: Delchamps, S.; Bleadon, M.; Bossert, R.; Carson, J.; Gourlay, S.; Hanft, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tests of 40 mm SSC dipole model magnets with vertically split yokes

Several 1 meter long, 40 mm aperture model SSC dipole magnets with vertically split yokes have been built and tested at Fermilab. In addition to the yoke design, these magnets were used to evaluate several variants of the collet clamps which apply prestress to the magnet ends. The magnets were instrumented with voltage taps for quench localization and strain gage based devices for measuring stresses, forces and deflections resulting from cooldown and excitation. Test were carried out in a verti… more

Date: May 1, 1991

Creator: Koska, W.; Bossert, R.; Coulter, K.J.; Delchamps, S.; Gourlay, S.; Kinney, W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Magnetic field measurements of 1. 5 meter model SSC collider dipole magnets at Fermilab

Magnetic field measurements have been performed at Fermilab on 1.5 m magnetic length model dipoles for the Superconducting Supercollider. Harmonic measurements are recorded at room temperature before and after the collared coil is assembled into the yoke and at liquid helium temperature. Measurements are made as a function of longitudinal position and excitation current. High field data are compared with room temperature measurements of both the collared coil and the completed yoked magnet and … more

Date: September 1, 1991

Creator: Lamm, M. J.; Bleadon, M.; Coulter, K. J.; Delchamps, S.; Hanft, R.; Jaffery, T. S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Full length SSC R and D dipole magnet test results

Four full scale SSC development dipole magnets have been tested for mechanical and quench behavior. Two are of a design similar to previous magnets but contain a number of improvements, including more uniform coil size, higher pre-stress and a redesigned inner-outer coil splice. One exceeds the SSC operating current on the second quench but the other appears to be limited by damaged superconductor to a lower current. The other two magnets are of alternate designs. One trains erratically and fai… more

Date: March 1, 1989

Creator: Strait, J.; Bleadon, M.; Brown, B.C.; Hanft, R.; Kuchnir, M.; Lamm, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Test results from Fermilab 1. 5 m model SSC collider dipole magnets

We will present results from tests of 1.5 m model SSC collider dipole magnets. These R D magnets are identical to the 15 m full length dipoles currently being assembled at Fermilab in all important aspects except length. Because of their small size they can be built faster and tested more extensively than the long magnets. The model magnets are used to optimize design parameters for, and to indicate the performance which can be expected from, the 15 m magnets. The are instrumented with voltage … more

Date: September 1, 1991

Creator: Koska, W.; Bossert, R.; Carson, J.; Coulter, K. J.; Delchamps, S.; Gourlay, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Full length prototype SSC dipole test results

Results are presented from tests of the first full length prototype SSC dipole magnet. The cryogenic behavior of the magnet during a slow cooldown to 4.5K and a slow warmup to room temperature has been measured. Magnetic field quality was measured at currents up to 2000 A. Averaged over the body field all harmonics with the exception of b/sub 2/ and b/sub 8/ are at or within the tolerances specified by the SSC Central Design Group. (The values of b/sub 2/ and b/sub 8/ result from known design a… more

Date: April 24, 1987

Creator: Strait, J.; Brown, B.C.; Carson, J.; Engler, N.; Fisk, H.E.; Hanft, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Bipolar and unipolar tests of 1. 5m model SSC collider dipole magnets at Fermilab

Tests have been performed at Fermilab on 1.5 m magnetic length model SSC collider dipoles using both bipolar and unipolar ramp cycles. Hysteresis energy loss due to superconductor and iron magnetization and eddy currents is measured and compared as a function of various ramp parameters. Additionally, magnetic field measurements have been performed for both unipolar and bipolar ramp cycles. Measurements such as these will be used to estimate the heat load during collider injection for the SSC Hi… more

Date: May 1, 1991

Creator: Lamm, M. J.; Ozelis, J. P.; Coulter, K. J.; Delchamps, S.; Jaffery, T. S.; Kinney, W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Mechanical design and analysis of the 2D cross-section of the SSC collider dipole magnet

This paper describes the mechanical design of the two dimensional cross-section of the base-line collider dipole magnet for the Superconducting Super Collider. The components described here are the collar laminations, the tapered keys that lock the upper and lower collars, the yoke laminations, the cold mass shell. We describe in detail the shape of the outer surface of the collars which defines the yoke-collar interface, and the shape of the collar interior, which defines the conductor placeme… more

Date: May 1, 1991

Creator: Strait, J.; Kerby, J.; Bossert, R. & Carson, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Tests of prototype SSC (Superconducting Super Collider) magnets

Results are presented from tests of the third full scale development dipole magnet for the Superconducting Super Collider and from a retest of a 4.5 m model magnet of the same design mounted in an SSC cryostat. The 4.5 m magnet shows consistent quench performance between its original tests in boiling liquid helium in a vertical dewar and the current tests in forced flow helium in a horizontal cryostat. Little or no retraining is observed over several thermal cycles. The full length magnet requi… more

Date: September 21, 1987

Creator: Strait, J.; Brown, B.C.; Hanft, R.; Koepke, K.; Kuchnir, M.; Lundy, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Fermilab R and D test facility for SSC (Superconducting Super Collider) magnets

The test facility used for R and D testing of full scale development dipole magnets for the SSC is described. The Fermilab Magnet Test Facility, originally built for production testing of Tevatron magnets, has been substantially modified to allow testing also of SSC magnets. Two of the original six test stands have been rebuilt to accommodate testing of SSC magnets at pressures between 1.3 Atm and 4 Atm and at temperatures between 1.8 K and 4.8 K and the power system has been modified to allow … more

Date: February 1, 1989

Creator: Strait, J.; Bleadon, M.; Hanft, R.; Lamm, M.; McGuire, K.; Mantsch, P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cryogenic instrumentation of an SSC (superconducting super collider) magnet test stand

This paper describes the system used to acquire cryogenic data for the testing of SSC magnets at the Fermilab Magnet Test Facility. An array of pressure transducers, resistance thermometers, vapor pressure thermometers, and signal conditioning circuits are used. Readings with time resolution appropriate for quench recording are obtained with a waveform digitizer and steady-state measurements are obtained with higher accuracy using a digital voltmeter. The waveform digitizer is clocked at a 400 … more

Date: September 1, 1987

Creator: McGuire, K.; Strait, J.; Kuchnir, M. & McInturff, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Design and construction experience with collet end clamps for 50 mm aperture SSC collider dipoles

Collet end clamps employed on full length and model SSC dipole magnets designed and built at Fermilab are described. Experimental data are presented for the baseline Fermilab design. Tests using pressuresensitive film to register the midplane and pole coil pre- stresses in the end clamp region are reviewed. Theoretical calculations address end clamp mechanics at room temperature, liquid helium temperature, and under magnetic excitation.

Date: April 1, 1992

Creator: Heger, P.; Bossert, R.; Carson, J.; Delchamps, S.; Ewald, K.; Fulton, H. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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SSC collider dipole magnets field angle data

In the fabrication of both 40 and 50 mm collider dipole superconducting magnets, surveys of the direction of the magnetic field along their length have been taken. This data besides being used for certifying compliance with the specifications for the finished magnet, yields interesting information on the straightness and rigidity of the coil placement between some stages in their manufacture and testing. A discussion on the measuring equipment and procedures is given. All of the 40 mm magnets t… more

Date: September 1, 1992

Creator: Kuchnir, M.; Bleadon, M.; Schmidt, E.; Bossert, R.; Carson, J.; Delchamps, S.W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Results from the Fermilab 1. 5 m model magnet program

A series of model SSC collider dipole magnets (50 mm aperture, 1.5 m magnetic length) are being built and tested at Fermilab. The early magnets have been built according to the Fermilab baseline design. The magnets are precursors to the full length 15 m models to be used in the Accelerator Systems String Test at the SSCL. All magnets are instrumented with voltage taps for quench localization and with strain gages to measure stresses and deflections in the coil and support structure. Measurement… more

Date: April 1, 1992

Creator: Lamm, M.; Bossert, R.; Carson, J.; Delchamps, S.; Jaffery, T.; Kinney, W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Magnetic field measurements of full length 50 mm aperture SSC dipole magnets at Fermilab

Thirteen 16 m long, 50 mm aperture SSC dipole magnets, designed jointly by Fermilab, Brookhaven National Laboratory, Lawrence Berkeley Laboratory and the SSC Laboratory, have been built at Fermilab. The first nine magnets have been fully tested to date. The allowed harmonics are systematically shifted from zero by amounts larger than the specification. The unallowed harmonics, with the exception of the skew sextupole, are consistent with zero. The magnet-to-magnet RMS variation of all harmonics… more

Date: September 1, 1992

Creator: Strait, J.; Bossert, R.; Carson, J.; Delchamps, S.W.; Gourlay, S.; Hanft, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Test results of Post-ASST design Fermilab built 1. 5 meter, SSC collider model dipole magnets

A series of 1.5 meter long and 50 mm aperture model SSC collider dipole magnets have been successfully built and tested at Fermilab. Later models have been built to test several extensions to the Fermilab design and variations in the manufacturing parameters. Some of the variations tested included conductor insulation scheme, alternate materials for coil end parts and coil winding. The coils are instrumented with voltage taps for the purposes of quench localization and with strain gages to meas… more

Date: September 1, 1992

Creator: Jaffery, T. S.; Carson, J.; Delchamps, S. W.; Kinney, W.; Koska, W.; Lamm, M. J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tests of High Gradient Superconducting Quadrupole Magnets for the Tevatron

Tests have been completed on three prototype magnets and two production magnets to be used for the Tevatron D{phi}/B{phi} low- {beta} insertion. These cold iron, two shell quadrupoles are made of 36 strand Rutherford type NbTi superconducting cable. Magnet field gradients well in excess of the design 1.41 T/cm have been achieved at a transfer function of 0.291 T/cm/kA. Quench performance at 4.2 K and 3.7 K and magnetic multipole measurement data are presented and discussed. 9 refs., 4 figs., 4 … more

Date: September 1989

Creator: Lamm, M. J.; Carson, J.; Gourlay, S.; Hanft, R.; Koepke, K.; Mantsch, P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Measurement of. nu. p. --> nu. p and anti. nu. p. -->. anti. nu. p elastic scattering. [Differential cross sections, systematic errors, coupling-constant constraints, form factors]

There were 217 (66) events of the process ..nu..p..--> nu..p (anti ..nu..p..-->..anti..nu..p) with an estimated background of 82 (28). The neutral to charged current ratios are sigma(..nu..p..--> nu..p)/sigma(..nu..n..--> mu../sup -/p) = 0.11 +- 0.02 and sigma(anti ..nu..p ..-->.. anti ..nu..p)/sigma (anti ..nu..p ..-->.. ..mu../sup +/n) = 0.19 +- 0.05 for 0.40 < q/sup 2/ < 0.90 (GeV/c)/sup 2/ where -q/sup 2/ is the square of the four momentum transfer to the proton. These yield sigma(anti ..nu… more

Date: January 1, 1978

Creator: Williams, H. H.; Entenberg, A.; Kozanecki, W.; Horstkotte, J.; Mann, A. K.; Rubbia, C. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Tests of prototype SSC magnets

Results are presented from tests of the first two full length prototype SSC dipole magnets. Magnetic field measurements have been made at currents up to 2000 A. The two magnets achieved peak currents at 4.5K of 5790 A and 6450 A, respectively, substantially below the short sample limit of 6700 A. These peak values, however, could not be achieved reproducibly. Data are presented from studies performed to try to understand the poor quench performance.

Date: April 24, 1987

Creator: Strait, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experimental evaluation of vertically versus horizontally split yokes for SSC (Superconducting Super Collider) dipole magnets

The yoke in SSC dipole magnets provides mechanical support to the collared coil as well as serving as a magnetic element. The yoke and skin are used to increase the coil prestress and reduce collar deflections under excitation. Yokes split on the vertical or horizontal mid-plane offer different advantages in meeting these objectives. To evaluate the relative merits of the two configuration a 1.8 m model dipole was assembled and tested first with horizontally split and then with vertically split… more

Date: May 3, 1990

Creator: Strait, J.; Coulter, K.; Jaffery, T.; Kerby, J.; Koska, W. & Lamm, M.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Mechanical behavior of Fermilab-built 1.5 m model SSC collider dipoles

Several model SSC collider dipole magnets (50 mm aperture, 1.5 m magnetic length) have been built and tested at Fermilab. These magnets are instrumented with strain gauges to measure stresses in the coil, the cold mass shell, and the coil end clamp assembly. Measurements are made of these quantities during assembly, cooldown, excitation, and warmup. Additional mechanical measurements are made on magnet sub-assemblies during manufacturing. Data from these measurements are presented and compared … more

Date: September 1, 1991

Creator: Strait, J.; Bossert, R.; Carson, J.; Coulter, K. J.; Delchamps, S.; Jaffery, T. S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department