scholarly journals Global observations of substorm injection region evolution: 27 August 2001

2009 ◽  
Vol 27 (5) ◽  
pp. 2019-2025 ◽  
Author(s):  
E. Spanswick ◽  
E. Donovan ◽  
W. Liu ◽  
J. Liang ◽  
J. B. Blake ◽  
...  
Keyword(s):  
National Laboratory ◽  
Alamos National Laboratory ◽  
Los Alamos National Laboratory ◽  
Geosynchronous Satellite ◽  
Cluster Data ◽  
In Situ Observations ◽  
Substorm Injection ◽  
Injection Region ◽  
Region Evolution

Abstract. We present riometer and in situ observations of a substorm electron injection on 27 August 2001. The event is seen at more than 20 separate locations (including ground stations and 6 satellites: Cluster, Polar, Chandra, and 3 Los Alamos National Laboratory (LANL) spacecraft). The injection is observed to be dispersionless at 12 of these locations. Combining these observations with information from the GOES-8 geosynchronous satellite we argue that the injection initiated near geosynchronous orbit and expanded poleward (tailward) and equatorward (earthward) afterward. Further, the injection began several minutes after the reconnection identified in the Cluster data, thus providing concrete evidence that, in at least some events, near-Earth reconnection has little if any ionospheric signature.

Using Pressure Decay Methodology to Detect Glovebox Glove Failures

2007 ◽  
Author(s):  
Michael E. Cournoyer ◽  
Stephen Schreiber ◽  
Steve D. Chunglo
Keyword(s):  
Static Pressure ◽  
National Laboratory ◽  
Nuclear Industry ◽  
Nuclear Materials ◽  
Alamos National Laboratory ◽  
Los Alamos National Laboratory ◽  
Pressure Decay ◽  
Primary Means ◽  
Over Time

At the Los Alamos National Laboratory Plutonium’s Facility (TA-55), various isotopes of plutonium along with other actinides are handled in a glove box environment. Data collected from 700 unplanned openings in the glovebox environment indicate that 40% of these ruptures are glove failures, openings in the glove caused by degradation of the mechanical properties over time, e.g. exposure to chemicals and nuclear materials. The primary means of minimizing these types of glove failures is through a robust glove inspection program. Through a collaborative effort with Getinge La Calhe`ne, we have beta-tested their In-situ Glove Leak Tester (GLT2) in an active ventilation glovebox environment. This instrument tests glovebox gloves in place and uses pressure decay methodology, to tests up to four gloves at a time, in less than 5 minutes per test, and provides documentation of each test. While the GLT2 has been successful in static pressure enclosures that are possible in the pharmaceutical industry, the uninterruptible active negative pressure gloveboxes used in the nuclear industry present a new set of issues. In the following report, these issues are addressed and the limits of this technology defined, with the end result being that waste generated from glove failures has been minimized.

Automated mineral analysis in TASK8

1990 ◽  
Vol 48 (2) ◽  
pp. 212-213
Author(s):  
William F. Chambers ◽  
Arthur A. Chodos ◽  
Roland C. Hagan
Keyword(s):  
National Laboratory ◽  
Control Program ◽  
Mineral Analysis ◽  
Alamos National Laboratory ◽  
Mineral Phase ◽  
Los Alamos National Laboratory ◽  
California Institute Of Technology ◽  
Mineral Phases ◽  
Letter Code ◽  
Institute Of Technology

TASK8 was designed as an electron microprobe control program with maximum flexibility and versatility, lending itself to a wide variety of applications. While using TASKS in the microprobe laboratory of the Los Alamos National Laboratory, we decided to incorporate the capability of using subroutines which perform specific end-member calculations for nearly any type of mineral phase that might be analyzed in the laboratory. This procedure minimizes the need for post-processing of the data to perform such calculations as element ratios or end-member or formula proportions. It also allows real time assessment of each data point.The use of unique “mineral codes” to specify the list of elements to be measured and the type of calculation to perform on the results was first used in the microprobe laboratory at the California Institute of Technology to optimize the analysis of mineral phases. This approach was used to create a series of subroutines in TASK8 which are called by a three letter code.

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