Sample environments at the Intense Pulsed Neutron Source (IPNS). Page: 1 of 10
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ICANS-XIV
14th Meeting of the International Collaboration on
Advanced Neutron Sources
June 15-19, 1998
Utica, IL USA
SAMPLE ENVIRONMENTS o -
AT THE
INTENSE PULSED NEUTRON SOURCE (IPNS) CO N m
Co-
D. E. Bohringer and K. J. Volin --
Argonne National Laboratory, Argonne, IL 60439 USA
ABSTRACT
Neutron diffraction is a powerful tool for structural studies of samples in special sample
environments because of the high penetrating power of neutrons compared to x-rays. The Intense
Pulsed Neutron Source (IPNS) at Argonne National Laboratory (ANL) offers its users a variety
of sample environments for pulsed neutron scattering and diffraction experiments. At the present
time over 80% of all experiments performed at the IPNS involve some type of ancillary equipment
to control the sample environment'. These include closed-cycle refrigerators, cryostats, furnaces,
magnets, and pressure cells. There are also devices for automatic sample changing, positioning,
and orientating. Most instruments have at a minimum, a dedicated closed cycle refrigerator (10K
to RT) configured for the instrument's typical sample dimensions and scattering angles.
Standardization in instrument sample well dimensions, process control equipment, and control
software has made multi-instrument use of many of the furnaces and cryostats possible. General
use, multi-instrument equipment is maintained by the facility's technical staff. Instrument
dedicated equipment is maintained by the respective instrument scientist with help from the
ancillary equipment group. The design and upgrading of equipment is done by the ancillary
equipment engineer with the oversight and input of instrument scientists, instrument engineer, and
technical staff. Ancillary equipment conception and design is science driven, with the instrument
scientists and even users providing the initial input for design criteria.
1. Introduction
Special sample environments have become one of the neutron scatterer's primary tools in the
study of the structure and dynamics of materials. While many sample environments have been
developed for general use, others have been developed to investigate certain specific properties of
a particular material or class of materials. Often these are then modified to accommodate other
types and sizes of samples. Over the past 17 years, ancillary equipment that provides a special
sample environment for the neuron scatterer have been purchased, developed, invented and
reinvented by our operations staff, instrument scientists, and users. Listed in Table 1 are the
various pieces of ancillary equipment now in routine use on the neutron scattering instruments at
the IPNS.1IPNS Progress Report 1996.
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Bohringer, D. E. Sample environments at the Intense Pulsed Neutron Source (IPNS)., article, November 30, 1998; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc623214/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.