Magnetic field measurements of the CEBAF (NIST) wiggler using the pulsed wire method by Stephen M. Wallace

Cover of: Magnetic field measurements of the CEBAF (NIST) wiggler using the pulsed wire method | Stephen M. Wallace

Published by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va .

Written in English

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Edition Notes

Book details

ContributionsColson, William B., Neil, George R.
The Physical Object
Pagination46 p. ;
Number of Pages46
ID Numbers
Open LibraryOL25469293M

Download Magnetic field measurements of the CEBAF (NIST) wiggler using the pulsed wire method

The wigglers are mechani- cally independent and can be operated with the full periods at a constant or smoothly tapered gap, or with the exit-half magnetic gap widened so that the fields are negligible.

For the CEBAF IR FEL, only the entrance wiggler half would be used with a constant magnet gap of g = 13 mm giving a corresponding field Cited by: 5. Calhoun: The NPS Magnetic field measurements of the CEBAF book Archive Theses and Dissertations Thesis Collection Magnetic field measurements of the CEBAF (NIST) wiggler using the pulsed wire method.

The remainder will focus on use of the pulsed wire method for measuring the magnetic field errors of the CEBAF/National Institute of Science and Technology (NIST) wiggler. Data analysis indicates the wiggler will have a net electron beam deflection of x = mm, which is much greater than the electron beam radius of re = mm and the optical Cited by: 1.

The ARC project (CEBAF). The ARC is an equipment of CEBAF (at Jefferson Lab) to measure the absolute energy of the electron beam. The determination of the beam energy is done throw a very accurate measurement of the field integral of a reference dipole, electrically connected in series with the bending magnets transporting the beam from the.

The first section of this thesis will study the necessity of a FEL for shipboard defense, and state the advantages over other defense systems. The remainder will focus on use of the pulsed wire method for measuring the magnetic field errors of the CEBAF/National Institute of Author: Stephen M.

Wallace. Measurements are performed either by using fixed coils in a dynamic magnetic field, or by the magnetic flux lines; this being of particular importance in accelerator magnets. particle accelerator magnets. It is also the most precise method for measuring the direction of direction of the earth's magnetic field.

The CEBAF superconducting linac is capable of accelerating electron beams suitable for driving high-power free-electron lasers. The 45 MeV injector linac with a 6 cm period wiggler can produce kilowatt output powers of infrared light ( micrometer), while the MeV north linac can produce ultraviolet light (~ nm) at similar powers.

The measurement of magnetic fields is needed at all points in the experimental characterization of magnetic materials. A classical way to reveal and measure a magnetic field is by means of a closed-loop winding, where an electromotive force is detected, according to the Faraday–Maxwell law of electromagnetic induction, proportional to the.

Blume, P., The LabVIEW Style Book, ISBNPearson Education, a design of low cost virtual system for three dimensional magnetic field measurement and visualization is.

Geophysical exploration using measurements of the earth's magnetic field was employed earlier than any other geophysical technique. von Werde located deposits of ore by mapping variations in the magnetic field in InThalen published the first geophysical manuscript entitled The Examination of Iron Ore Deposits by Magnetic Measurements.

In addition the magnetic field can be strongly affected by the non-linear, diamagnetic behaviour of the superconducting material. In addition to magnet technology, the measurement of magnetic fields is a key science in various technical areas. High sensitivity field measurements are used to detect ores underground, mines.

In this book, magnetic measurements are discussed much wider than just obvious testing of magnetic Magnetic field measurements of the CEBAF book or the measurement of the magnetic £eld. Direct and indirect measurements of magnetic parameters like magnetic £eld strength H, ‘ux density B, permeability μ, susceptibility χ, or magnetostriction λ are commonly used in other.

Magnetic Field Measurement with Applications to Modern Power Grids offers researchers in the magnetic community a guide to the progress of the smart grid and helps to inspire innovation of magnetic technologies in the smart grid.

The technologies of measurement are a bridge between mathematical models and application oriented : Hardcover. along the direction of the magnetic field produced by the magnet, as depicted in Figure Figure Magnetic field produced by a bar magnet Notice that the bar magnet consists of two poles, which are designated as the north (N) and the south (S).

Magnetic fields are strongest at the poles. The magnetic field lines. @article{osti_, title = {Numerical modelling of the CEBAF electron gun with EGUN}, author = {Liger, Philippe and Krafft, Geoffrey}, abstractNote = {The electron source used in the injector for the CEBAF accelerator is a Hermosa electron gun with a 2 mm diameter cathode and a control electrode.

It produces a keV electron beam to be focused on the first of two apertures which comprise. the body. Only the induced electric field and resultant current density in tis-sues and cells are considered, as the internal magnetic field in tissues and cells is the same as the external field.

The chapter first considers calculations on a macroscopic scale referring to dimensions much greater than those of. A method is presented of absolute energy measurement with an accuracy of Delta Epsilon approximately equals 10(exp -4) Epsilon(sub o) by direct measurement of the bend angle in a high-precision magnetic dipole using two opposite-direction short (about 2 mm long) high-field-intensity magnets (bar-Beta(sub dipole) much less than Beta(sub short mag)) installed at each end and two K.

Book Abstract: A comprehensive review of the development, challenges and utilisation of magnetic field measurement. Magnetic Field Measurement with Applications to Modern Power Grids offers an authoritative review of the development of magnetic field measurement and the application of the technology to the smart grid.

The authors, noted experts in the field, present the challenges to the field. The experiment ran in Hall C in the spring of In it, the proton was probed with high-energy electrons from Jefferson Lab's CEBAF accelerator. These electrons plow deep into the proton to probe the quarks inside.

The angle at which they leave the proton is then measured, determining the. Energetic Communication. The first biomagnetic signal was demonstrated in by Gerhard Baule and Richard McFee in a magnetocardiogram (MCG) that used magnetic induction coils to detect fields generated by the human heart.

[] A remarkable increase in the sensitivity of biomagnetic measurements has since been achieved with the introduction of the superconducting quantum. Richter shows that the calculated decrease matches the measurements of magnetic field over the past years.

This provides powerful support for the third source, because it is based on laboratory experience with electomagnets, and empirical data from the earth itself.

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents: ch1 and magnetized materials. A charge that is moving in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.: ch13 The effects of magnetic fields are commonly seen in permanent magnets, which pull on magnetic materials such.

Since measuring began inthe total energy stored in the earth’s magnetic field has been decaying at a rate of 5% per century.1 Archaeological measurements show that the field was 40% stronger in AD Recent records of the International Geomagnetic Reference Field, the most accurate ever taken, show a net energy loss of % in just.

carrying the same current in this magnetic field. 2 3 (10) IB w h W Nm S 2) A uniform rectangular coil of total mass g and dimensions m x m is oriented perpendicular to a uniform -T magnetic field.

A current of A is suddenly started in the coil. (Book ) (a) About which axis (A_1 or A_2) will the coil begin to. The magnetic field meter is not suitable for the measurement of radiofrequency fields emitted from telecommunications sources such as mobile phones, mobile phone towers, Wi-Fi, smart meters, etc.

Readings taken very close (a few cm) to portable electronic devices such as mobile phones (as distinct from electrical devices such as heaters. The magnetic field will create a "sideways" change in electric potential across the material - which you can measure. Using this change in potential and the size of the material, you get the.

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PRODUCTION OF ULTRALOW MAGNETIC FIELDS FOR GRAVITY PROBE B GPB. MEASUREMENTS OF THE TENSILE STRENGTH OF LIQUID NITROGEN. THE BEHAVIOR OF LIQUID NITROGEN DURING PUMPDOWN.3/5(1). The gauss is the unit of magnetic flux density B in the system of Gaussian units and is equal to Mx/cm 2 or g/Bi/s 2, while the oersted is the unit of tesla (T) corresponds to 10 4 gauss, and one ampere (A) per meter corresponds to 4π × 10 −3 oersted.

The units for magnetic flux Φ, which is the integral of magnetic B-field over an area, are the weber (Wb) in the SI and the. This volume provides an in-depth review of all aspects of solar magnetic fields. Written by world-leading experts, it covers the solar interior, photosphere, chromosphere, active regions, corona, solar wind, history of the field, and necessary instrumentation.

Magnetic fields may be represented mathematically by quantities called vectors that have direction as well as magnitude. Two different vectors are in use to represent a magnetic field: one called magnetic flux density, or magnetic induction, is symbolized by B; the other, called the magnetic field strength, or magnetic field intensity, is symbolized by H.

The Magnet Measurement group has been working on the design of a new portable test stand that will enable the measurement of the magnetic field of large magnets in situ.

The final drawings are almost complete. The session will be in the CEBAF Center atrium, a.m. – 1 p.m. on Aug You may also post your best wishes and kind. The earth's magnetic field is a powerful witness for a world much younger than the billions of years required by evolutionary theories.

Let's start the story with the most prominent feature of the field today--its very rapid decay. The Field Is Decaying Rapidly The average "intensity" of the earth's magnetic field has decreased exponentially by about 7% since its first careful measurement in.

magnetometers serve as primary standards for the measurement of magnetic fields. The article concludes with a discussion of tools that can be used to generate magnetic fields and calibrate magnetic field devices. Introduction The magnetic field is a fundamental property of the earth, the sun, and many planets in.

“Geoscan” magnetic noise measurement (a) and background magnetic field (b). As far as use of gondola for distancing magnetic sensor from the UAV is rather impossible for such a lightweight aircraft as “Geoscan”, the best option for the sensor placement is the end of wing, where magnetic influence of the aircraft ranges from −4.

[Show full abstract] enhancement of the magnetic field at the satellite and a worldwide T enhancement at the ground. Energetic electron fluxes rose sharply at the satellite, indicating that. The magnetic field diverts the spin up atoms in one direction and the spin-down atoms in another direction.

This produces two distinct bands on a screen (Figure \(\PageIndex{2}\)). Figure \(\PageIndex{2}\): In the Stern-Gerlach experiment, an external, nonuniform magnetic field diverts a beam of electrons in two different directions.

The magnetic field and magnetosphere. Neptune, like most of the other planets in the solar system, possesses an internally generated magnetic field, first detected in by Voyager Earth’s magnetic field, Neptune’s field can be represented approximately by that of a dipole (similar to a bar magnet), but its polarity is essentially opposite to that of Earth’s present field.

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If desired, measure the field along only two axes, or even one axis, choosing the direction that is best for the experiment. Step by Step Guide to Electromagnetic Field Surveys - a Recommended EMF Measurement Procedure, This paper discusses a recommended procedure for performing electromagnetic field (EMF) or electro-magnetic radiation EMR measurements either by engaging a professional or by consumers using low-cost instruments which measure EMF exposure levels in gauss or milligauss.

This can be explained using the result for the magnetic field due to a straight line current (Section ), in which we found that the magnetic field follows a “right-hand rule” – The magnetic field points in the direction of the curled fingers of the right hand when the thumb of the right hand is aligned in the direction of current flow.

Make sure you include proper labels and units. Insert your table below. Magnetic Field Current (amps) Measure the length of your solenoid and the number of turns. Both measurements should only include the turns between the two alligator connectors.The magnetic circuit of Fig. might be used to produce a high magnetic field intensity in the narrow air gap.

An N -turn coil is wrapped around the left leg of the highly permeable core. Provided that the length g of the air gap is not too large, the flux resulting from the current i in this winding is largely guided along the magnetizable.

Precise measurement of the field in the experiment is crucial because the magnetic field strength is a major player in the ultimate determination of “g,” a property of the muon whose ultimate determination will either confirm present theories of particle physics or point to the existence of undiscovered particles.

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