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Gaithersburg

SHIELDED SOLENOIDS

NAME EQUIPMENT BEAMLINE PERFORMANCE INSTRUMENT USED KRONOS 8" OD, 12" L Max 2\theta: 5.0\(^{\circ}\) Measurable Q range: 0.015 Å -1 - 0.12 Å...
Elizabeth Gentry holding a kilogram test weight in the weights and measures training lab

Kilogram: The Future

Massive Change With the international metrology community providing all the required measurements for updating the SI, the kilogram — along...
watt balance vacuum enclosure

Kilogram: The Kibble Balance

Named after its inventor, Bryan Kibble at the U.K.’s National Physical Laboratory (NPL), who conceptualized it in 1975, the Kibble balance...
Two meter bars with a red background

Kilogram: The Present

Artifacts and Uncertainty Many units of measure have been defined in terms of artifacts. For example, until 1960 the international...

NSF DEVICES/EQUIPMENT

Neutron spin filter equipment is separated by type. Each has general parameters listed for user reference. Typically, the equipment chosen...

Kilogram: Focus on History

Who decides? On May 20, 1875, 17 different countries signed the Treaty of the Meter (also called the Meter Convention) to establish new...
woodcut. Left: man pouring liquid into a container. Middle: woman with scales. Right: man with fabric and a ruler

Kilogram: The Past

For almost a century and a half, much of the world used a highly polished, golf ball-sized cylinder of a platinum alloy as the international...

INSTRUMENT PRESENTATION SLIDES

Neutron Spin Filters on CANDOR Neutron Spin Filters on MACS Neutron Spin Filters on MAGIK Neutron Spin Filters SANS Neutron Spin Filters on...

Digital Forensics

Digital evidence includes data on computers and mobile devices, including audio, video, and image files as well as software and hardware. Digital evidence can

SEOP METHOD

Spin Exchange Optical Pumping (SEOP) In the spin-exchange method (apparatus shown above), two steps are needed to polarize 3He by this...

Virtual Meetings

To join virtual meetings, please email Roger Bostelman for a WebEx login information. F45.02 – 1st Tuesday/month from 1-3 PM F45.03...

Face-to-Face Meetings

November 11-12, 2019 ASTM F45 Committee Meeting Agenda The ASTM International Committee F45 on Driverless Automatic Guided Industrial...
illustration. gray disk. green rods come up from the disk.

Hanging by a Nanowhisker

If Alexander Yulaev and his colleagues had their druthers, they’d do away with whiskers altogether. These scientists don’t have anything against facial hair...
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