Field measurements in pulsed microwigglers Page: 3 of 16
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
detects the wave's amplitude and time dependence. This amplitude signature is
analyzed for the field magnitude and orientation along the wire.
The pulsed-wire technique has special advantages:
1. One measurement gives the field all along the wire rapidly and conveniently.
2. Both field components perpendicular to the wire can be measured
3. If a short current pulse is used, the measurement corresponds to the field at one
instant of time.
4. The field probe is the thin wire; it can fit into spaces much smaller than those
for a typical probe. The signal generated on the wire is propagated down the
wire to a convenient spot where there is room for the sensor.
5. Depending on the length of the current pulse, the amplitude measurement gives
directly either the first or the second integral of the magnetic field. If the field
is to deflect electron or ion beams, the integrals are particularly useful. The
first integral, for example, determines the angular deflection of the beam; the
second, the amplitude of its transverse deflection. Using more common field-
measuring techniques, we have to determine these important quantities by
measuring the field and then integrating these results numerically, a tedious
method fraught with errors.
The major disadvantages of the pulsed-wire technique are related to the sag in
the wire, distortions in the signature caused by the stiffness of the wire, and the
occurrence of spurious signals that are not understood.
The purposes of this paper are threefold: to describe advances we have made in
the hardware, toward simplification and increased sensitivity for use with
microwigglers; to identify and clarify the sources of some of the spurious signals; and
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Warren, R. (Los Alamos National Lab., NM (United States)) & Preston, D.W. (California State Univ., Hayward, CA (United States)). Field measurements in pulsed microwigglers, article, January 1, 1991; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1053190/m1/3/: accessed January 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.