Rotor cap removing tools, microwave guides, and methods
Apparatuses and methods for removing caps, such as NMR rotor caps. The apparatuses and methods may permit caps to be removed in a manner that minimizes damage to equipment and instruments. Microwave waveguides that may include an elongated waveguide, a spline horn, and a slotted waveguide. Analytical instruments that include the waveguides.
1 . A slotted waveguide comprising:
a metallic tube having a first end and a second end; and
a sample tube inserted partially into the second end of the metallic tube;
wherein the metallic tube defines a plurality of slots in a surface of the metallic tube, wherein each slot of the plurality of slots consists of a linear slit having a length, a width, and a thickness, wherein the length exceeds the width, the length exceeds the thickness, and every length of the plurality of slots is oriented perpendicularly to a longitudinal axis of the metallic tube, and wherein the first end of the metallic tube is configured to be coupled to a device for directing or controlling electromagnetic radiation, and wherein the metallic tube is not corrugated.
2 . The slotted waveguide of claim 1 , wherein each slot of the plurality of slots has a width that is about 4 to about 6 times smaller than a wavelength of a microwave beam.
3 . The slotted waveguide of claim 1 , wherein each slot of the plurality of slots has a width of about 120 μm to about 130 μm.
4 . The slotted waveguide of claim 1 , wherein each slot of the plurality of slots has a length that is at least 5 times greater than its width.
5 . The slotted waveguide of claim 1 , wherein each slot of the plurality of slots has a length that is at least 50 times greater than its width.
6 . The slotted waveguide of claim 1 , wherein the sample tube is formed at least in part of a dielectric material.
7 . The slotted waveguide of claim 1 , wherein the plurality of slots is present along a full length of the metallic tube.
8 . The slotted waveguide of claim 1 , wherein the plurality of slots consists of slots having uniform dimensions.
9 . The slotted waveguide of claim 1 , wherein the plurality of slots comprises slots having different dimensions.
10 . A slotted waveguide comprising:
a metallic tube having a first end and a second end; and
a sample tube inserted partially into the second end of the metallic tube;
wherein the metallic tube defines a plurality of slots in a surface of the metallic tube, wherein each slot of the plurality of slots consists of a linear slit having a length, a width, and a thickness, wherein the length exceeds the width, the length exceeds the thickness, and every length of the plurality of slots is oriented perpendicularly to a longitudinal axis of the metallic tube, and wherein the first end of the metallic tube is configured to be coupled to a device for directing or controlling electromagnetic radiation, and wherein the metallic tube is not corrugated;
wherein each slot of the plurality of slots has a width of about 120 μm to about 130 μm; and
wherein each slot of the plurality of slots has a length that is at least 5 times greater than its width.
11 . The slotted waveguide of claim 10 , wherein each slot of the plurality of slots has a length that is at least 50 times greater than its width.
12 . The slotted waveguide of claim 10 , wherein the sample tube is formed at least in part of a dielectric material.
13 . The slotted waveguide of claim 10 , wherein the plurality of slots is present along the full length of the metallic tube.
14 . The slotted waveguide of claim 10 , wherein the plurality of slots consists of slots having uniform dimensions.
15 . The slotted waveguide of claim 10 , wherein the plurality of slots comprises slots having different dimensions.