scholarly journals Design study of a time-of-flight small-angle diffractometer for a pulsed neutron source

1978 ◽  
Vol 11 (5) ◽  
pp. 464-465 ◽  
Author(s):  
M. Carpenter ◽  
J. Faber
Keyword(s):  
Neutron Source ◽  
Small Angle ◽  
Time Of Flight ◽  
Design Study ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source

Resolution of time-of-flight small-angle neutron diffractometers

1987 ◽  
Vol 20 (4) ◽  
pp. 273-279 ◽  
Author(s):  
R. P. Hjelm
Keyword(s):  
Small Angle ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Time Of Flight ◽  
Simple Method ◽  
Neutron Diffractometer ◽  
Reduction Methods ◽  
Measurement Strategies ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source

A simple method of calculating the resolution of small-angle neutron data from diffractometers which use time-of-flight techniques has been derived in terms of the variances of the time and spatial channels of the measurement. The method is used to calculate the resolution in scattering-vector space of scattering intensity from a simulated isotropic scatterer on the small-angle neutron diffractometer at the Intense Pulsed Neutron Source at Argonne National Laboratory. The effects of the various instrumental geometries, time-of-flight measurement strategies and data reduction methods that can be chosen by the experimenter are considered. It is found that the best resolution is obtained with weighted constant Δt/t time-of-flight data acquisition schemes, with the detector placed in the beam in such a way that the highest possible angular range is accessed.

A Gorizont neutron reflectometer—small-angle spectrometer based on the IN-06 pulsed neutron source

2010 ◽  
Vol 4 (6) ◽  
pp. 873-878 ◽  
Author(s):  
V.S. Litvin ◽  
V. A. Trunov ◽  
A. P. Bulkin ◽  
V. A. Ul’yanov ◽  
V. A. Solovei ◽  
...  
Keyword(s):  
Neutron Source ◽  
Small Angle ◽  
Neutron Reflectometer ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source

Electronically focused time-of-flight powder diffractometers at the intense pulsed neutron source

1989 ◽  
Vol 22 (4) ◽  
pp. 321-333 ◽  
Author(s):  
J. D. Jorgensen ◽  
J. Faber ◽  
J. M. Carpenter ◽  
R. K. Crawford ◽  
J. R. Haumann ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Source ◽  
Rietveld Method ◽  
Time Of Flight ◽  
Scattering Angle ◽  
Wide Range ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source

Two time-of-flight powder diffractometers have operated at the Intense Pulsed Neutron Source (IPNS) since August 1981. These instruments use dedicated microcomputers to focus time-of-flight events so that data from different detectors can be summed into a single histogram. Thus, large multidetector arrays can be employed at any scattering angle from 12 to 157°. This design permits data to be collected over a uniquely wide range of d spacings while maintaining high resolution and count rates. The performance of the two instruments is evaluated by analyzing data from a standard Al2O3 sample by the Rietveld method. These instruments provide the capability for moderate- to high-resolution measurements with the duration of a typical run being a few hours.

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