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in subjects: "Meson Factories"

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Beam line windows at LAMPF

The A-6 main beam-line window at LAMPF separates the vacuum of the main beam line from the isotope production station, proton irradiation ports, and the beam stop, which operate in air. This window must withstand the design beam current of 1 mA at 800 MeV for periods of at least 3000 hours without failure. The window is water cooled and must be strong enough to withstand the 2.1 MPa (300 psig) cooling water pressure, as well as beam-induced thermal stresses. Two designs have been used to meet t… more

Date: January 1, 1985

Creator: Brown, R. D.; Grisham, D. L. & Lambert, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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On designing a control system for a new generation of accelerators

A well-conceived plan of attack is essential to the task of designing a control system for a large accelerator. Several aspects of such a plan have been investigated during recent work at LAMPF on design strategies for an Advanced Hadron Facility control system. Aspects discussed in this paper include: identification of requirements, creation and enforcement of standards, interaction with users, consideration of commercial controls products, integration with existing control systems, planning f… more

Date: January 1, 1987

Creator: Schaller, S.C. & Schultz, D.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Conversion from RSX-11D to RSX-11M or: did I really want to do it

The LAMPF Nuclear Chemistry Data Acquisition System (DAS) is used to acquire and to process data from a variety of nuclear chemistry experiments. In June 1977, the DAS was upgraded to a PDP-11/34 and RSX-11D V6.2 and FORTRAN 4-PLUS V2.5. That software remained in use until January, 1984 even though the PDP-11/34 was replaced by a PDP-11/44, and a number of peripherals were added or replaced. The arrival and installation of an RA-60 disk system forced us to upgrade to RSX-11M V4.1 and FORTRAN-77… more

Date: January 1, 1984

Creator: Giesler, G. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Bunch-Motion Feedback for B-Factories

The colliding electron and positron beams in a B-factory must have average current of one ampere or more to produce the required luminosity. The high current interacts with structures in the beam tube to drive strong coupled-bunch (c.b.) instabilities. To suppress these instabilities requires negative feedback of the bunch motions. Beam impedances arising from strong rf cavity modes should first be reduced to make the required feedback damping rate practical and the cost economical. In what fol… more

Date: September 1992

Creator: Lambertson, G. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Status of the PEP-II asymmetric B-Factory

The PEP-II project is an e{sup +}e{sup {minus}} storage ring complex with unequal energy beams to study CP violation in the B meson system. High luminosity requires a large number of bunches and a low value of beta at the collision point. The high beam current requires advances in vacuum chambers, damped RF cavities, and feedback systems. Machine elements inside the detector are required to achieve low beta values and magnetic separation.

Date: November 1994

Creator: Mattison, Thomas S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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PEP-II: An Asymmetric B factory. Conceptual Design Report

In this report, the authors have described an updated conceptual design for the high-luminosity Asymmetric B Factory (PEP-II) to be built in the PEP tunnel culmination of more than four years of effort aimed at the design and construction of an asymmetric e{sub +}e{sub {minus}} collider capable of achieving a luminosity of L = 3 {times} 10{sup 33} cm{sup {minus}2} s{sup {minus}1}. All aspects of the conceptual design were scrutinized in March 1991 by a DOE technical review committee chaired by … more

Date: June 1, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Performance of the LAMPF particle separator

The electrostatic beam separator in the EPICS channel at LAMPF is now nearly fully operational. Improvements to the high voltage transmission system and the electronic controls as well as a higher quality channel vacuum have allowed the unit to be operated at its design field strengths. The bias electrode has proven to be useful in reducing ion-exchange currents and associated electrode heating. The detachable shielding and other apparatus for removing the separator from the activated channel w… more

Date: January 1, 1977

Creator: Liska, D. J. & Dauelsberg, L. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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QMODULE: CAMAC modules recognized by the QAL compiler

The compiler for the Q Analyzer Language, QAL, recognizes a certain set of CAMAC modules as having known characteristics. The conventions and procedures used to describe these modules are discussed as well as the tools available to the user for extending this set as required.

Date: October 1, 1977

Creator: Kellogg, M.; Minor, M.M.; Shlaer, S.; Spencer, N.; Thomas, R.F. Jr. & van der Beken, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Apiary B Factory lattice design

The Apiary B Factory is a proposed high-intensity electron-positron collider. This paper will present the lattice design for this facility, which envisions two rings with unequal energies in the PEP tunnel. The design has many interesting optical and geometrical features due to the needs to conform to the existing tunnel, and to achieve the necessary emittances, damping times and vacuum. Existing hardware is used to a maximum extent. 8 figs. 1 tab.

Date: April 1, 1991

Creator: Donald, M.H.R. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)) & Garren, A.A. (Lawrence Berkeley Lab., CA (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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LAMPF first-fault identifier for fast transient faults

The LAMPF accelerator is presently producing 800-MeV proton beams at 0.5 mA average current. Machine protection for such a high-intensity accelerator requires a fast shutdown mechanism, which can turn off the beam within a few microseconds of the occurrence of a machine fault. The resulting beam unloading transients cause the rf systems to exceed control loop tolerances and consequently generate multiple fault indications for identification by the control computer. The problem is to isolate the… more

Date: January 1, 1979

Creator: Swanson, Arthur R. & Hill, Robert E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Upgrading the LAMPF 201 MHz RF generators

Radio-frequency generators, operating at 201 MHz, power the first four stages of the Los Alamos Meson Physics Facility (LAMPF) accelerator. Each generator consists of four stages of series-connected, vacuum-tube amplifiers. The first amplifier is a grid-modulated tetrode that produces 500 W peak-power. The second amplifier is a drivemodulated tetrode that produces 5 kW peak-power. The third stage is a grid- and plate-modulated tetrode that produces 130 kW peak-power. The last stage is a plate-m… more

Date: January 1, 1993

Creator: Parsons, W. M.; Lyles, J. T. M. & Harris, H. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Microprocessor-controlled CAMAC data link module

Communication between the central control computer and remote, satellite data-acquisition/control stations at the Clinton P. Anderson Meson Physics Facility (LAMPF) is presently accomplished through the use of CAMAC-based Data Link modules. With the advent of the microprocessor, a new philosophy for digital data communications has evolved. Data Link modules containing microprocessor controllers provide link management and communication network protocol through algorithms executed in the Data Li… more

Date: May 1, 1978

Creator: Potter, J. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Introduction to Q

This manual presents an overview of the Q data-acquisition system. Its purposes are to assist an experimenter in determining whether the system is suited to his needs and to provide an introduction to the more detailed manuals. This system employs a powerful technique for dealing with multiprocessor systems by generating code and communication protocol for two processors from a single source program in a high-level language. Some details of experimental event buffering and distribution are disc… more

Date: June 1, 1978

Creator: Kellogg, M.; Minor, M.M.; Shlaer, S.; Spencer, N.; Thomas, R.F. Jr. & van der Beken, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Beam-beam effects for the PEP-II B Factory

We present a summary of a fairly extensive study of beam-beam issues that arise in the design of PEP-II. Most of these studies are carried out with ``strong-strong`` multiparticle tracking simulations. We focus on: choice of nominal beam-beam parameter, strength of the parasitic collisions, injection issues, performance and tradeoffs with unequal beam-beam parameters. We comment only briefly on beam lifetime. We conclude that: the beams are sufficiently well separated so that the parasitic coll… more

Date: May 1, 1993

Creator: Furman, M. A. & Eden, J. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tests of non-local interferences in kaon physics at asymmetric {phi}-factories

Tests of non-local interference effects in the two-kaon system are proposed. The first kind of tests consists of measuring the amount of destructive interference between K{sub S} {yields} K{sub L} regeneration processes of two distant kaons. The second kind deals with constructive interference. These tests could be performed at an asymmetric {phi}-factory. Estimates are given of the number of events predicted by orthodox quantum mechanics and kaon regeneration theory in various suitable experim… more

Date: April 16, 1993

Creator: Eberhard, P. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Status of LAMPF

LAMPF is a successful facility serving a wide variety of users at the 100-..mu..A level. The availability of beam is satisfactory and a very large amount of scientific and applied investigation can be carried out with the facility in its present form. The engineering and applied physics problems in increasing the current another factor of ten are formidable but seem amenable to eventual solution.

Date: January 1, 1976

Creator: Hagerman, D. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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LAMPF Line D fast deflector system

The Weapons Neutron Research Facility is only one of many experimental areas which utilize the 800 MeV proton beam from LAMPF. Designated as Line D, this area may use entire beam pulses of 500 ..mu..s width at pulse rates up to 12 Hz or it can choose to take the last 5 ..mu..s off each pulse at a 120 Hz rate. The deflection system employed to accommodate the latter of these two modes of operation is described. The deflection of the proton beam into Line D is accomplished in a 1.09 m, 1.25 kG fe… more

Date: January 1, 1977

Creator: Faulkner, J. R. & Cooper, R. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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A proposal to extend the intensity frontier of nuclear and particle physics to 45 GeV (LAMPF 2)

It is proposed to construct and operate a high-intensity, medium energy synchrotron addition to the Clinton P. Anderson Meson Physics Facility. The addition is to consist of a 6-GeV, 170-..mu..A booster and a 45-GeV, 34-..mu..A, 3-Hz main synchrotron with 50% duty factor. The physics of strong and electroweak interactions to be studied at the facility is discussed, as well as accelerator design, scope of experimental area facilities, and cost estimates and schedule. (LEW)

Date: December 1, 1984

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Effects of parasitic beam-beam interaction during the injection process at the PEP-II B Factory

This paper is concerned with beam-beam effects during the injection process at the proposed asymmetric SLAC/LBL/LLNL B-Factory, PEP-II. It is shown that the parasitic beam-beam interaction can lead to a significant blowup in the vertical size of the injected beam. Simulation results for the horizontal and the vertical injection schemes are presented, and their performances are studied.

Date: June 1, 1992

Creator: Chin, Y. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Center for Beam Physics, 1992

This report contains the following information on the center for beam physics: Facilities; Organizational Chart; Roster; Profiles of Staff; Affiliates; Center Publications (1991--1993); and 1992 Summary of Activities.

Date: June 1, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

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The PEP-II design

The Stanford Linear Accelerator Center (SLAC), Lawrence Berkeley Laboratory (LBL), Lawrence Livermore National Laboratory (LLNL) Positron Electron Project-II (PEP-II) is a design for a high-luminosity, asymmetric energy, electron-positron colliding beam accelerator that will operate at the center-of-mass energy of the {Upsilon}4S (10.58 GeV). The goal of the design is to achieve a large enough integrated luminosity with a moving center-of-mass reference frame to he able to observe the predicted… more

Date: May 1, 1995

Creator: Sullivan, M.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Data-acquisition software for the LAMPF control system

As part of the upgrade of the Los Alamos Meson Physics Facility (LAMPF) control computer, the software providing the interface between application programs and the accelerator hardware was redesigned. This new Data System design - which handles more than 12,000 widely different devices - allows greater uniformity, flexibility, maintainability, and hardware independence than before. The Data System portion of the LAMPF Control System is described in this paper.

Date: January 1, 1983

Creator: Schaller, S.C. & Rose, P.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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LAMPF 805-MHz accelerator structure tuning and its relation to fabrication and installation

In the course of construction of the 805-MHz linac, it was necessary to set 10,000 resonant cavities to precise frequencies and to check, and in some cases, to adjust the field distribution along the beam axis of the 104 rf tanks composing the linac. Since this was the first proton linac of the side-coupled type ever built, it was necessary to develop new techniques and instrumentation for structure tuning. An outline of the fabrication and installation process is given, showing how the tuning … more

Date: July 1, 1979

Creator: Swain, G.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Monitors 1980: now there are two

The Clinton P. Anderson Meson Physics Facility (LAMPF) has developed two identical remote-handling systems, Monitors I and II, that are used to repair, replace, and maintain the main proton beam line. The systems use electric master-slave manipulators to perform the required tasks using only closed-circuit television for viewing. Advances in controls and mechanical subassemblies have increased the efficiency of operation to a significant degree. Recent major emergency repair operations have fur… more

Date: January 1, 1980

Creator: Grisham, D. L.; Baldwin, T. S.; Ekberg, E. L.; Lambert, J. E.; Madrid, M. A. & Tanner, R. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department