Injection septum magnets for the Loma Linda medical accelerator (open access)

Injection septum magnets for the Loma Linda medical accelerator

The injection beamline runs over the last magnet before a long straight section and is then displaced downward 55.88 cm to the accelerator beamline. The displacement is magnetic and the final deflection onto the synchrotron orbit is by an electric kicker. The first component, the reverse septum magnet, bends the injection beam 25)degree) downward. This is followed by the injection septum (20)degree) bend upward) and the final injection kicker (5)degree) bend upward). The septum magnets produce a peak field of 3.4 K gauss at a current of 28,000 amperes within a 0.1 msec long pulse. The electric kicker produces a field of 7.3 KV/cm with a pulse length of 0.0011 msec. The septum magnets are similar to each other in construction with a bending radium of 72.7 cm. The curvature is required to increase the effective aperture. Each magnet has a single-turn copper coil bonded to a stainless steel plate for reinforcement. This eliminates insulating material, which could be subject to radiation damage, at the septum. The stainless steel plate is welded to the magnet laminations. The current is confined to the septum by the insulation between the laminations, which are a standard core material. The total septum thickness with …
Date: September 22, 1987
Creator: Satti, J.A.
Object Type: Article
System: The UNT Digital Library
Heavy quark production in ep collisions at HERA. [None] (open access)

Heavy quark production in ep collisions at HERA. [None]

There are substantial production rates of heavy quarks from ep collisions at HERA. The center of mass energy of about 300 GeV is well above any b-quark threshold effects, and for b/bar b/ production, the cross section is estimated to be 3.3 nb per event, leading to rates approaching 10/sup 6/ b mesons per year. The rates for c/bar c/ production are about two orders of magnitude greater. Two major detectors are under construction and a program of heavy quark physics will start in 1990. 3 refs., 4 figs.
Date: December 22, 1987
Creator: Derrick, M.
Object Type: Article
System: The UNT Digital Library
New Results From the LASS (Large Aperture Superconducting Solenoid) Spectrometer (open access)

New Results From the LASS (Large Aperture Superconducting Solenoid) Spectrometer

New results are presented from analyses of several mesonic and baryonic states containing one or more strange quarks. The data are taken from a high statistics (4 events/nb) study of K p interactions at 11 GeV/c carried out in the LASS Spectrometer at SLAC. New information is reported on the underlying K* states and also evidence for selective coupling of K eta to the K*'s; on the strangeonium members of the axial vector nonets in the K anti K channel; and on evidence for an * state.
Date: June 22, 1987
Creator: Aston, D.; Awaji, N.; Bienz, T.; Bird, F.; D'Amore, J.; Dunwoodie, W. et al.
Object Type: Article
System: The UNT Digital Library
One and Two Dimensional Radiation Analysis of the Compact Ignition Tokamak (open access)

One and Two Dimensional Radiation Analysis of the Compact Ignition Tokamak

This report consists of a group of slides describing the compact ignition tokamak (CIT). Several drawings present the layout of the facility. Concerns about radiation effects are mentioned. (JDH)
Date: April 22, 1987
Creator: Selcow, E. C.
Object Type: Article
System: The UNT Digital Library
Central Calorimeter Transporter Cart Design (open access)

Central Calorimeter Transporter Cart Design

The purpose of the cryostat transporter cart is to provide a means of rolling the CC cryostat in and out of a building, and to proyide a means of support for the cryostat while it is being worked on. The constraints on the cart are: (1) There should be a minimum amount of clearance between the cryostat and the ground, in order to be able to roll the cart and cryostat into a building; (2) The cart must be able to support the weight of the cryostat as well as the weight of approximately 4,000 gallons of liquid nitrogen; and (3) The cart must allow access to the underside of the cryostat for work that must be done. This report will address the design of the transporter cart, as well as any additional equipment needed to accomplish the above mentioned tasks.
Date: September 22, 1987
Creator: Weber, K.
Object Type: Report
System: The UNT Digital Library
MH Strap Model Test (open access)

MH Strap Model Test

The MC portion of the MH module was stacked using the copper buttons as spacers. Stainless steel bars measuring 3-inch wide by 1/8-inch thick were welded along all the corner edges, except the outer radius edges, where the bars were bolted to plates 1,2,13 and 14. The buttons were then knocked out. Nine strain gauge rosettes were mounted on the model. Three rosettes were placed at various locations on along the bottom or inner radius side. Each rosette was centered in a gap between two absorber plates. The same pattern was duplicated on the opposite side. In addition, two rosettes were placed on the top stainless straps that were bolted down. One rosette was placed on each side, located in the center of the strap and the center of the model. The last rosette was placed on the bottom or inner radius of the model, in the first gap. The included graphs plot stress intensity versus load applied for each of the nine rosetts, and for all three load cases. The stress curves are linear in all cases, except for the rosettes mounted on the unwelded straps, where buckling did occur. The maximum stress occurring in the model was between …
Date: July 22, 1987
Creator: Weber, K.
Object Type: Report
System: The UNT Digital Library
RHIC Injection and Beam Dump Schemes (open access)

RHIC Injection and Beam Dump Schemes

None
Date: April 22, 1987
Creator: J., Claus
Object Type: Report
System: The UNT Digital Library
The U.S. Hot Dry Rock Project (open access)

The U.S. Hot Dry Rock Project

The Hot Dry Rock geothermal energy project began in the early 1970’s with the objective of developing a technology to make economically available the large ubiquitous thermal energy of the upper earth crust. The program has been funded by the Department of Energy (and its predecessors) and for a few years with participation by West Germany and Japan. An energy reservoir was accessed by drilling and hydraulically fracturing in the Precambrian basement rock outside the Valles Caldera of north-central New Mexico. Water was circulated through the reservoir (Phase I, 1978-1980) producing up to 5 MWt at 132ºC. A second (Phase II) reservoir has been established with a deeper pair of holes and an initial flow test completed producing about 10 MWt at 190ºC. These accomplishments have been supported and paralleled by developments in drilling, well completion and instrumentation hardware. Acoustic or microseismic fracture mapping and geochemistry studies in addition to hydraulic and thermal data contribute to reservoir analyses. Studies of some of the estimated 430,000 quads of HDR resources in the United States have been made with special attention focused on sites most advantageous for early development. 3 figs., 1 tab., 12 refs.
Date: January 22, 1987
Creator: Hendron, Robert H.
Object Type: Article
System: The UNT Digital Library