TITLE

Quasielastic high-resolution direct geometry TOF spectrometers. at steady-state reactors and at spallation sources

AUTHOR(S)
Lechner, R.E.
PUB. DATE
June 2002
SOURCE
Applied Physics A: Materials Science & Processing;Dec2002 Supplement, Vol. 74 Issue 6, ps151
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Intensity optimization at a given resolution of direct-geometry multi-chopper time-of-flight (MTOF) spectrometers for high-resolution QENS experiments is discussed in view of further developing this technique to allow moreefficient measurements and more-extensive variation of the time scales, on one and the same instrument. We show that the total intensity of a modern MTOF spectrometer as compared to the best existing can be increased by two orders of magnitude at continuous neutron sources and by at least three orders of magnitude at future pulsed neutron sources.
ACCESSION #
8905368

 

Related Articles

  • Shrinking the `Universal Sensor'.  // R&D Magazine;Aug99, Vol. 41 Issue 9, ps-53 

    Reports that the time-of-flight spectrometer (TOF-MS) being developed by researchers at Baltimore, Maryland can fit into a package about the size of a shoebox. Several enhancements in TOF-MS; Comparison of TOF-MS with traditional mass spectrometry; Size and weight highlights; Applications for...

  • X-ray luminosity time-of-flight spectrometer for laser-produced plasmas. Naik, P. A.; Gupta, P. D.; Kumbhare, S. R. // Review of Scientific Instruments;Jul1988, Vol. 59 Issue 7, p1076 

    A simple and compact x-ray luminosity time-of-flight spectrometer for measurements of the velocity distribution of highly charged ions in laser-produced plasmas is presented. The spectrometer is based on making time- and space-resolved measurements of x-ray line emission from these ions in the...

  • The new JET 2.5-MeV neutron time-of-flight spectrometer. Elevant, T.; Belle, P. v.; Grosshög, G.; Hoek, M.; Jarvis, O. N.; Olsson, M.; Sadler, G. // Review of Scientific Instruments;Oct92, Vol. 63 Issue 10, p4586 

    A major upgrade of the JET 2.5-MeV neutron time-of-flight spectrometer has been completed. The improvement has permitted ion temperature measurements for Maxwellian deuterium plasmas with T[sub i] > 4 keV to be obtained in 0.5-s intervals. By combining observations of neutron and x-ray energy...

  • Position-sensitive time-of-flight mass spectrometer using a fast optical imaging technique. Kinugawa, Tohru; Arikawa, Tatsuo // Review of Scientific Instruments;Jul1992, Vol. 63 Issue 7, p3599 

    A simple position-sensitive time-of-flight mass spectrometer has been developed with an aid of a gatable image intensifier. This spectrometer is a display-type analyzer allowing simultaneous measurements of the mass, speed, and angular distributions. The apparatus demonstrates a time resolution...

  • A time-of-flight mass spectrometer for large molecular clusters produced in supersonic expansions. Conover, C. W. S.; Twu, Y. J.; Yang, Y. A.; Bloomfield, L. A. // Review of Scientific Instruments;Jun89, Vol. 60 Issue 6, p1065 

    Supersonic free jet expansions are often used to produce beams of cold molecules and clusters. They are an essential part of laser vaporization cluster sources, where small particles of a material are seeded within a helium carrier gas during the expansion. These sources accelerate the clusters...

  • A parabolic mirror time-of-flight electron energy analyzer. Trevor, D. J.; Van Woerkom, L. D.; Freeman, R. R. // Review of Scientific Instruments;Jun89, Vol. 60 Issue 6, p1051 

    We have designed and built a high-efficiency time-of-flight electron spectrometer which has the potential to record accurately the angular distribution of the photoemitted electrons. This analyzer uses an electrostatic analog of an optical parabolic mirror to collimate, in an isochronic fashion,...

  • Measurement of absolute differential cross sections for the excitation of the pi, pi[sup *]... Asmis, Knut R.; Allan, Michael // Journal of Chemical Physics;5/1/1997, Vol. 106 Issue 17, p7044 

    Discusses the use of a magnetically collimated electron impact spectrometer with pulsed incident electron beam and time-of-flight selection of electrons scattered in the forward and backward directions, to measure differential cross sections (DCS) for the excitation of the valence triplet state...

  • A time-of-flight spectrometer for low-energy neutral and ionized alkalis. Kimmel, G. A.; Cooper, B. H. // Review of Scientific Instruments;Mar93, Vol. 64 Issue 3, p672 

    A time-of-flight spectrometer has been developed for measuring velocity- and angle-resolved distributions of neutral and ionized alkali atoms in the range of several electron volts to several thousand electron volts. The spectrometer is mounted on a rotating platform inside a previously existing...

  • High resolution time-of-flight mass spectrometers. Part III. Reflector design. Bergmann, T.; Martin, T. P.; Schaber, H. // Review of Scientific Instruments;Oct90, Vol. 61 Issue 10, p2592 

    The reflector has a central influence on the properties of a time-of-flight mass spectrometer. The mass resolution can be greatly improved using a reflector with homogeneous fields. A reflector with homogeneous fields can also have focusing properties and thus enhance sensitivity of the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics