The National Ignition Campaign (NIC) team recently conducted the first “convergent ablator” experiment using an X-ray streak camera to measure the velocity of the capsule implosion. The ablator is the plastic material surrounding the fuel in a NIF capsule that blows off (ablates) when heated by the X-rays inside the hohlraum. This causes a rocket-like implosion that compresses and heats the fuel to the conditions required for fusion.
Convergent ablator experiments measure changes in the capsule at various stages of the implosion. A thin metal foil called a backlighter is placed behind the hohlraum to generate X-rays that illuminate the capsule during the implosion, much like a strobe light.
In the March 24 experiment, 181 NIF beams heated the depleted uranium hohlraum with 1.475 megajoules of ultraviolet light, while eight beams heated the x-ray backlighter target located on the opposite side of the streak camera.The backlighter pulse illuminated the imploding capsule, and the ablator edges cast a sharp shadow on the detector.
About the image:
The first continuous streak camera record of a NIF implosion, captured by the diagnostic instrument manipulator insertable streak camera. The broad bright region extending the length of the record is the x-ray backlighter. The dark line in the center is the shadow of a fiducial (reference) wire over the hohlraum diagnostic window. The slanted lines are the shadows cast by the ablator as it implodes. The image shows the ablator moving inward and then exploding after stagnating near the center of the capsule. The bright x-ray self-emission at “bang time,” the peak of the implosion, can be seen at the center.
Dr. Njema Frazier, a physicist in NNSA’s Defense Programs, has been selected as a Nifty Fifty speaker as part of the USA Science & Engineering Festival. Dr. Frazier will be speaking on “The Physics of Roller Coasters” to students at Martin Luther King Jr. Elementary School in Washington, D.C., on April 12.
NNSA is among more than 100 science and engineering institutions and organizations across the nation who has teamed up with the program to send top researchers as speakers to middle and high schools throughout the Washington, D.C, region, helping to inspire students in science, technology, engineering and mathematics (STEM).
The Nifty Fifty are an integral part of the festival’s mission to actively involve leading researchers from science and engineering institutions and organizations. Speakers were carefully chosen by festival organizers from hundreds of applicants for their differing fields, talents, divergent backgrounds and ages. Their names were submitted by more than 500 of the festival’s leading partner organizations and then were culled down to the top 100.
Nifty Fifty speakers were also selected for their ability to convey the importance of science to young audiences and to the non-science public. Speakers will fan out in March and April to schools across the greater Washington, D.C., region.
The Nifty Fifty scientists and engineers include high technology entrepreneurs and financiers, policy makers, actors, journalists, educators, researchers, explorers, storm chasers, video game developers, alien hunters, astronauts and brain surgeons.
For more information on the USA Science & Engineering Festival see the Festival website.
When he hopped into the firetruck for his last run Monday, Pantex firefighter Bill Hickman was ready to turn over his title to a slightly younger person.
Hickman, who at 78 was thought to be the nation’s oldest firefighter, marked his retirement Monday with one last drive under the flashing lights of a firetruck to a ceremony at the Plant to commemorate his 48 years at Pantex.
“I wholeheartedly salute Bill for his years of service at Pantex,” said Pantex Fire Department Chief Mike Brock. “It’s impressive to me to see how well he has taken care of himself and remained a valued member of this department. It’s always hard when you see someone with that kind of experience walk out the door.”
The International Association of Firefighters does not track the ages of all of its members, so the organization cannot say with absolute certainty that Hickman is the oldest active (non-volunteer) firefighter in the country. However, IAFF officials say they are unaware of an older active firefighter, so they presume that Hickman is the longest serving.
Hickman came to work at Pantex on March 30, 1964, as a boilermaker and welder. He joined the fire department in 1970 and has spent more than 30 years as a motor pump operator. He said he still wakes up every morning and does stretches and calisthenics, which allows him to complete the grueling firefighter combat challenge in well under the required seven minutes.
“48 years is a long time,” Hickman said. “For the most part, it’s been a very enjoyable ride. I’m glad for the time I spent at Pantex. But at 78 years old; it’s time.”
B&W Pantex metal worker Charles Thomas runs a water jet machine cutting out pieces for a 3-D Tyrannosaurus Rex puzzle. The metal shop employees completed the puzzles to present at Tuesday’s 30th annual Step UP to Success program, where middle school students from across Amarillo, Texas, come to learn about various career options.
Thomas presented a program on pursuing a career in the skilled trades, using the puzzles to show what is possible in the hands of a skilled craftsman. Other Pantexans made presentations about careers in emergency services and engineering.
B&W Y-12 presented a check this week for $25,000 to the Boy Scouts of America, Great Smoky Mountain Council, to go toward the Great Smoky Mountain Council Capital Campaign, which supports capital development projects at Camp Buck Toms and Camp Pellissippi.
At left, Joey Andrews, Pellissippi district executive and Larry Brown, Scout executive, accept the contribution from Bill Klemm, B&W Y-12 deputy general manager and senior vice president of Operations, and Paul Wasilko, deputy manager, Uranium Processing Facility Programs and also BSA Pellissippi district chairman.
This money is in addition to a $5,000 B&W Y-12 corporate contribution (and individual employee contributions of $4,100) made in February, bringing B&W Y-12's total contribution for this year to $34,100.
NNSA is working with a small group of interested companies to further develop their approaches in support of potential reuse opportunities for the Bannister Federal Complex in south Kansas City.
In October 2011, the NNSA issued a Notice of Availability for the transfer, sale, or lease of its property at the Bannister Federal Complex. As a result, the NNSA received a substantial response from various companies, which included redevelopment plans that extended beyond the bounds of the NNSA property to include the GSA property. The current proposals include plans for the entire Complex, including NNSA’s portion and the portion owned by the U.S. General Services Administration (GSA).
NNSA, with GSA as a cooperating agency, is currently working on a National Environmental Policy Act (NEPA) study, which is analyzing multiple disposition plans related to the Bannister Federal Complex. Under NEPA, the study will consider the impact of each proposed federal action on the quality of the human environment.
Consistent with the NEPA process, NNSA will work with the small group of companies to further develop their approaches in support of potential reuse opportunities. This approach allows conceptual design and feasibility studies to be performed while not limiting the choice of reasonable alternatives available to the agency.
Savannah River Nuclear Solutions, LLC (SRNS), in partnership with the Society of Women Engineering and The Ruth Patrick Science Education Center, recently extended invitations to middle schools throughout the greater Aiken-Augusta area to select young women to participate in this year’s “Introduce A Girl To Engineering Day.”
Each participating school selected and sent to this event three female students who have shown an interest in a career involving engineering. The event is part of a greater effort designed to help area students take small steps toward easing the shortage of workers skilled in engineering disciplines.
During the day-long event, the participants also had an opportunity to interact with women currently working in various fields of science, technology and engineering. In addition, each received a special gift for attending.
The primary goals of these outreach programs are to enhance interest in science, mathematics, engineering and technology and to support improvements in education in the Central Savannah River Area by using the unique resources available at the Site.
The DOE Savannah River Operations Office provides a variety of science and literacy outreach programs at the Savannah River Site by funding and coordinating the efforts of several organizations.
Glenn York, cyber security specialist at the Los Alamos Site Office (LASO), has been named a fellow in the Information Systems Security Association (ISSA) and recognized as a distinguished leader in the information security community.
York serves on the cyber security team for LASO’s Safeguards and Security office. Prior to joining LASO, he worked as a senior IT security engineer and team lead contractor at LASO. As a contractor, he led a team of three guiding an effort of 150 people in revising IT security policies and accrediting 67 unique systems in less than a year.
The ISSA, of which York has been a member since 2003, is the community of choice for international cyber security professionals dedicated to advancing individual growth, managing technology risk and protecting critical information and infrastructure. ISSA has more than 10,000 members in 150 chapters worldwide.
York has worked tirelessly over the years to raise quality and quantity of Information Security college courses, as well as promote participation in professional organizations.
York founded and serves as president of the Northern New Mexico Chapter of the ISSA. He is currently leading the planning effort for the Information Technology Security Summit New Mexico, scheduled for May 3, 2012, at Santa Fe Community College. The one-day conference will offer IT and information assurance professionals and entrepreneurs from all industries the opportunity to learn about the latest computer security trends, to network with peers, and to share remediation strategies.
A number of Pantexans volunteered Friday, March 30, to help renovate two Habitat for Humanity homes in Amarillo, Texas. B&W Pantex provided breakfast and lunch for the volunteers, who were encouraged to bring family members to help with the homes. Workers spent most of the day painting the exteriors, and also helped with other small jobs. Pantexans have built or helped with six Habitat homes, working alongside eventual homeowners.
Researchers at Los Alamos National Laboratory's biggest magnet facility recently produced magnetic fields in excess of 100 tesla while conducting six different experiments. The hundred-tesla level is roughly equivalent to 2 million times Earth's magnetic field.
The team used the 100-tesla pulsed, multi-shot magnet, a combination of seven coils sets weighing nearly 18,000 pounds and powered by a massive 1,200-megajoule motor generator. There are higher magnetic fields produced elsewhere, but the magnets that create such fields blow themselves to bits in the process. The system at Los Alamos is instead designed to work nondestructively, in the intense 100-tesla realm, on a regular basis.
To read more about the work see: http://www.lanl.gov/news/releases/magnetic_field_researchers_target_hundred_tesla_goal.html
To see the video go to: http://www.lanl.gov/news/stories/magnet-lab-video.html