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in subjects: "Monitors"

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Beam Loss Monitors in the NSLS Storage Rings

Beam loss monitors (BLM) have been used for more than two decades in the VUV ring at the NSLS. These have proved useful for optimizing injection and operation of the ring. Recently similar monitors have been installed in the X-ray ring and are being used to better understand injection, as well as operation of the ring. These units have been compared with the Bergoz BLMs, which have been mostly useful for understanding operating beam losses.

Date: May 4, 2009

Creator: Kramer, S. L. & Fedurin, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Experience with beam loss monitors in the low energy demonstration accelerator

No Description Available.

Date: May 1, 2000

Creator: Sellyey, W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Use of a commercial ranging system in field surveys of radioactively contaminated sites

Now, the adaptation of a commercial ranging and tracking system interfaced to these instruments and to an advanced computer graphics system promises another major improvement to the automation of data collection. Contour maps with radiation isopleths and the x-y position of up to eight instrument operators superimposed thereon can be displayed in near real time. A bidirectional data link offers a further improvement in simulation of, and training for, field surveys since previously collected or… more

Date: January 1, 1984

Creator: Worth, G. M.; Crowell, J. M.; Meddles, A. D.; Jarrett, J. D.; Wolf, M. A.; Umbarger, C. J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Operational problems with radiation survey meters - The University and Accelerator perspectives

This article describes problems encountered with commercial survey meters. The desired qualities of such instruments for use around accelerators are listed. Attempts to meet the accelerator monitoring needs by modifying commercial instruments and by in-house research and development are described.

Date: June 1, 1984

Creator: McCall, R.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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QUAD FAMILY CENTERING.

It is well known that beam position monitors (BPM) utilizing signals from pickup electrodes (PUE) provide good resolution and relative accuracy. The absolute accuracy (i.e. position of the orbit in the vacuum chamber) is not very good due to the various reasons. To overcome the limitation it was suggested to use magnetic centers of quadrupoles for the calibration of the BPM [1]. The proposed method provides accuracy better then 200 microns for centering of the beam position monitors using modul… more

Date: November 1, 2005

Creator: PINAYEV, I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The response of survey meters to pulsed radiation fields

The response of most survey meters to steady radiation fields is fairly well known and documented. However, hardly any data is available in the literature regarding the response of these instruments to pulsed radiation. Pulsed radiation fields are encountered, e.g., in the vicinity of linear electron accelerators or klystrons. An instrument that ordinarily responds well to the average dose rate spread out evenly in time may not be able to cope with such a high dose rate. Instruments which have … more

Date: November 1, 1987

Creator: McCall, R.C. & Ipe, N.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The Use of Activated Charcoal Iodine Monitors During and Following a Release of Fission Product Iodines

The present core of the Brookhaven Graphite Reactor consists of some 4900 highly enriched uranium fuel loaded in 615 horizontal fuel channels passing through a 25 foot cube of graphite moderator and reflector. The core is divided into two halves (north and south) by an 8 cm. wide vertical gap in the center of the graphite. The cooling air enters the reactor through inlet filters, at the rate of 270,000 CFM, passes into the central gap and flows bi-directionally through the north and south halve… more

Date: January 13, 1964

Creator: Foelix, Charles F. & Gemmell, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Performance testing of Eberline Alpha 6 and Alpha 6A continuous air monitors

Eberline Alpha 6 and Alpha 6A continuous air monitors (CAMs) were tested against the performance criteria of the International Electrotechnical Commission standard 761-6, ``Equipment for Continuously Monitoring Radioactivity in Gaseous Effluents, Part 6: Specific Requirements for Transuranic Aerosol Effluent Monitors``, and against ANSI N42.17B, ``Performance Specification Health Physics Instrumentation--Occupational Airborne Radioactivity Monitoring Instrumentation``. The performance criteria … more

Date: January 1, 1998

Creator: Johnson, M. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Beta-energy response of the Eberline RO-7 survey instrument

An RO-7 radiation survey instrument was obtained from the Eberline Instrument Corporation to use in a study of the beta dose rates from the Godiva IV Critical Assembly at Los Alamos National Laboratory. A limited evaluation of the instrument was performed, and its energy dependence for beta particles was determined. The RO-7 instrument is a hand-held, cutie-pie-style survey meter with a liquid crystal digital readout. The instrument is available with three interchangeable ion chamber probes, al… more

Date: October 10, 1982

Creator: Hankins, D.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Resolving two beams in beam splitters with a beam position monitor

The beam transport system for the Advanced Hydrotest Facility (AHF) anticipates multiple beam splitters. Monitoring two separated beams in a common beam pipe in the splitter sections imposes certain requirements on diagnostics for these sections. In this note we explore a two-beam system in a generic beam monitor and study the feasibility of resolving the positions of the two beams with a single diagnostic device. In the Advanced Hydrotest Facility (AHF), 20-ns beam pulses (bunches) are extract… more

Date: January 1, 2002

Creator: Kurennoy, S. (Sergey)

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Simple MCA supports a variety of applications

A greatly enhanced version of the Violinist I, Simple Multichannel analyzer has been developed at Los Alamos. The new instrument includes a more powerful microprocessor, more memory, and a sophisticated set of I/O devices. The combination of these features allow the same basic electronics package to function in a variety of smart sophisticated monitoring instruments. Only the packaging, detector, and software need be changed to change the instrument from a field survey instrument for Pu contami… more

Date: January 1, 1984

Creator: Wolf, M. A. & Staley, H. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Timing Jitter Characterization at the NSLS SDL

Two novel timing jitter measurement techniques with a 100 fs resolution are presented in this paper. The first technique based on the Schottky effect, is used to measure the timing jitter between the photoinjector drive laser and the RF system; and it was employed to characterize the environment effects on the timing jitter. The I/Q beam monitor based on a stripline beam position monitor (BPM) is used to characterize the electron beam arrival time jitter.

Date: May 4, 2009

Creator: Qian,H.; Hidaka, Y.; Murphy, J. B.; Podobedov, B.; Seletskiy, Shen, Y.; Yang, X. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Noise control of radiological monitoring equipment

Although vacuum pumps on continuous air monitors (CAMs) do not produce noise levels above regulatory limits, engineering controls were used to establish a safer work environment. Operations performed in areas where CAMs are located are highly specialized and require precision work when handling nuclear materials, heavy metals, and inert gases. Traditional methods for controlling noise such as enclosing or isolating the source and the use of personal protection equipment were evaluated. An innov… more

Date: December 31, 1998

Creator: Rubick, R.D.; Stevens, W.W. & Burke, L.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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RF systems for the betatron-node scheme experiment at LBNL

Two-beam accelerators based upon relativistic klystrons (RK's) have been proposed as power sources for future generation electron-positron linear colliders. These drivers are known to suffer from several transverse beam-breakup (BBU) instabilities. A program to study a particular technique (the 'betatron node scheme') of ameliorating the high frequency BBU is under way at LBL. Central to this study are the pillbox RF cavities and RF beam position monitors (BPM's) employed. This paper discusses … more

Date: June 22, 2001

Creator: Lidia, Steven M.; De Santis, Stefano & Houck, Timothy

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Non-Intrusive Load Monitoring Assessment: Literature Review and Laboratory Protocol

To evaluate the accuracy of NILM technologies, a literature review was conducted to identify any test protocols or standardized testing approaches currently in use. The literature review indicated that no consistent conventions were currently in place for measuring the accuracy of these technologies. Consequently, PNNL developed a testing protocol and metrics to provide the basis for quantifying and analyzing the accuracy of commercially available NILM technologies. This report discusses the re… more

Date: July 1, 2013

Creator: Butner, R. Scott; Reid, Douglas J.; Hoffman, Michael G.; Sullivan, Greg & Blanchard, Jeremy

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

MPX: software for multiplexing hardware performance counters in multithreaded programs

Hardware performance counters are CPU registers that count data loads and stores, cache misses, and other events. Counter data can help programmers understand software performance. Although CPUs typically have multiple counters, each can monitor only one type of event at a time, and some counters can monitor only certain events. Therefore, some CPUs cannot concurrently monitor interesting combinations of events. Software multiplexing partly overcomes this limitation by using time sharing to mon… more

Date: January 8, 2001

Creator: May, J M

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Graphite Burnout Monitoring: Part 1, Monitor Preparation and Handling Techniques

Report that describes graphite oxidation monitors and their proper storage and handling, as well as the losses encountered when moving the monitors between the laboratory and the reactor.

Date: June 1964

Creator: Ryan, B. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Vertical and horizontal position sensing of unbunched beams

No Description Available.

Date: July 12, 1973

Creator: Cottingham, J.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Quantification of surface contamination: principles and applications

The applications discussed in this paper underscore the usefulness and versatility of molecular luminescence spectroscopy as an efficient surface detection technique. The technique can be used not only as a qualitative characterization method, but also as a quantitative analytical tool to detect trace contaminants on surfaces. Recent advances in instrumentation and methodology have expanded the applicability of surface luminescence into many new problem areas. Trace organics are emphasized here. more

Date: January 1, 1982

Creator: Vo-Dinh, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Remote acquisition of gamma-ray pulse height spectra

The acquisition of pulse height spectra data in the industrial environment has traditionally evolved along two paths. The first required the transporting of a radioactive sample from the place of production to a computer system for counting and analysis. This method results in a degradation of the data due to the time delay between sample production and subsequent counting. The second path was taken to count the sample at the place of production and transport the data in the form of paper or ma… more

Date: January 1, 1975

Creator: Killian, E.W. & Heath, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Determination of the beta energy (E/sub max/) using thin window instruments

The use of simple survey instruments for beta-energy analysis is complicated by large differences that exist in the beta spectra shapes. These spectral shapes are often complex and change continuously as the betas are absorbed in air. Changes are also caused by absorbing material between the source and the detector. One may frequently encounter a combination of beta energies, either from multiple emissions from a single isotope or from several isotopes in the sample being evaluated. There may a… more

Date: August 12, 1983

Creator: Hankins, D.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Construction and operation of the surface contaminant detector Mod II. [Non-radioactive contamination]

This report contains detailed construction and operating instructions, a parts list, and cost estimates for a surface contaminant detector. The instrument is sensitive to the condensible contaminant content of environments and has been used for monitoring industrial facilities where contaminant sensitive parts are processed.

Date: March 1, 1976

Creator: Cuthrell, Robert E.; Nogle, Vaughn D. & Tipping, Donald W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A Toroidal Charge Monitor for High-Energy Picosecond Electron Beams

A monitor system suitable for the accurate measurement of the total charge of a 2-ps 28.5 GeV electron beam over a large dynamic range is described. Systematic uncertainties and results on absolute calibration, resolution, and long-term stability are presented.

Date: March 28, 2007

Creator: Simmons, Robert H. & Ng, Johnny S.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Definition and means of maintaining the room continuous air monitors portion of the plutonium finishing plant (PFP) safety envelope

Room Continuous Air Monitors (CAMs) are used in areas where there is potential for dispersible radioactive material. These CAMs provide audible and visual alarms to warn personnel of an increase in airborne radioactivity.

Date: May 20, 1999

Creator: WHITE, W.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department