X-ray diffractometer having co-exiting stages optimized for single crystal and bulk diffraction
First Claim
1. An X-ray diffractometer comprising:
- a base;
a first stage that is attached to the base and rotates around an ω
axis;
a rotation stage that holds a crystal in a position suitable for a diffraction measurement and is mounted on the first stage at a first predetermined distance from the ω
axis; and
an XYZ stage that holds large and multiple samples in a position suitable for a diffraction measurement and is mounted on the first stage at a position diametrically opposed to the rotation stage and at a second predetermined distance from the ω
axis, both the rotation stage and the XYZ stage being mounted on the first stage during an X-ray diffraction measurement.
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Abstract
A diffractometer for X-ray diffraction measurements has two co-exiting sample stages which are mounted on the goniometer base simultaneously. A rotation stage is used for single crystal X-ray diffraction and an XYZ stage is used for general X-ray diffraction with bulky samples. The driving bases of both stages are located away from the instrument center so the measuring space in the vicinity of the instrument center is available to either of the two sample stages. With this arrangement, the rotation axis of the rotation stage stays aligned to the instrument center even when the XYZ stage is used for data collection. Therefore, realigning of the rotation stage to the instrument center is not necessary when switching the applications between the two stages.
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Citations
12 Claims
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1. An X-ray diffractometer comprising:
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a base; a first stage that is attached to the base and rotates around an ω
axis;a rotation stage that holds a crystal in a position suitable for a diffraction measurement and is mounted on the first stage at a first predetermined distance from the ω
axis; andan XYZ stage that holds large and multiple samples in a position suitable for a diffraction measurement and is mounted on the first stage at a position diametrically opposed to the rotation stage and at a second predetermined distance from the ω
axis, both the rotation stage and the XYZ stage being mounted on the first stage during an X-ray diffraction measurement. - View Dependent Claims (2, 3, 4, 5)
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6. An X-ray diffractometer comprising:
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a base; an X-ray source attached to the base; a first stage that is attached to the base and rotates around an ω
axis;a second stage that is attached to the base and rotates around a 2θ
axis;an X-ray detector attached to the second stage; a rotation stage that holds a crystal in a position suitable for a diffraction measurement and is mounted on the first stage at a first predetermined distance from the ω
axis; andan XYZ stage that holds large and multiple samples in a position suitable for a diffraction measurement and is mounted on the first stage at a position diametrically opposed to the rotation stage and at a second predetermined distance from the ω
axis, both the rotation stage and the XYZ stage being mounted on the first stage during an X-ray diffraction measurement. - View Dependent Claims (7, 8, 9, 10)
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11. A method for making X-ray diffraction measurements on an X-ray diffractometer having a rotation stage that holds a crystal in a position suitable for a diffraction measurement and an XYZ stage that holds large and multiple samples in a position suitable for a diffraction measurement both stages being mounted on a stage that rotates around an ω
- axis, the method comprising;
(a) moving the XYZ stage away from the ω
axis without removing the XYZ stage from the stage that rotates around the ω
axis;(b) mounting a goniometer head that rotates around a φ
axis on the rotation stage;(c) mounting the crystal sample on the goniometer head and aligning the sample to an instrument center; and (d) performing a single crystal X-ray diffraction measurement. - View Dependent Claims (12)
- axis, the method comprising;
Specification