2016 Calendar

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    P11-NTD

    The next-generation neutron temporal diagnostic (P11-NTD) is used for high-yield cryogenic DT experiments. Here, the P11-NTD nose-cone assembly is being installed in the target chamber. The graph shows the predicted and measured neutron histories from a cryogenic capsule implosion. The inset photograph shows Senior Laboratory Engineer, Joe Katz, checking the final alignment of the diagnostic.

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    P11-NTD

    The next-generation neutron temporal diagnostic (P11-NTD) is used for high-yield cryogenic DT experiments. Here, the P11-NTD nose-cone assembly is being installed in the target chamber. The graph shows the predicted and measured neutron histories from a cryogenic capsule implosion. The inset photograph shows Senior Laboratory Engineer, Joe Katz, checking the final alignment of the diagnostic.

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    KBframed

    The next-generation Kirkpatrick–Baez (KB) 16-image microscope developed by Senior Scientist, Frederic J. Marshall (shown in inset), employs new x-ray optics for use on OMEGA cryogenic target implosions. The measurements from this new time-resolved KB microscope are used to infer the central pressure achieved in the cryogenic implosions—a key performance metric in establishing DT fusion-ignition equivalence with the OMEGA laser.

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    KBframed

    The next-generation Kirkpatrick–Baez (KB) 16-image microscope developed by Senior Scientist, Frederic J. Marshall (shown in inset), employs new x-ray optics for use on OMEGA cryogenic target implosions. The measurements from this new time-resolved KB microscope are used to infer the central pressure achieved in the cryogenic implosions—a key performance metric in establishing DT fusion-ignition equivalence with the OMEGA laser.

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    MagPTOF

    The magnet-based particle time-of-flight (MagPTOF) diagnostic will measure the shock and compression bang times on a variety of implosion platforms at the National Ignition Facility (NIF). Shown is Senior Manufacturing Engineer, John Szczepanski, with the assembled unit. The inset shows a MagPTOF recording of D3He protons from NIF shot N150326-001-999—a D3He—filled glass shell irradiated with 40 kJ of energy.

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    MagPTOF

    The magnet-based particle time-of-flight (MagPTOF) diagnostic will measure the shock and compression bang times on a variety of implosion platforms at the National Ignition Facility (NIF). Shown is Senior Manufacturing Engineer, John Szczepanski, with the assembled unit. The inset shows a MagPTOF recording of D3He protons from NIF shot N150326-001-999—a D3He—filled glass shell irradiated with 40 kJ of energy.

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    Omega Laser Facility Users Group (OLUG)

    The Seventh Omega Laser Facility Users Group Workshop, held 22–24 April 2015, attracted 110 researchers from around the world. Most of the 70 contributed posters were given by students and postdocs in attendance. The next workshop will be held 27–29 April 2016.

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    Omega Laser Facility Users Group (OLUG)

    The Seventh Omega Laser Facility Users Group Workshop, held 22–24 April 2015, attracted 110 researchers from around the world. Most of the 70 contributed posters were given by students and postdocs in attendance. The next workshop will be held 27–29 April 2016.

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    High-Performance Cryogenic Experiments

    A comparison of the measured hot-spot pressure with simulated values showing that >50-Gbar pressure was achieved in direct-drive layered DT cryogenic implosions on OMEGA. A combination of laser and target improvements on OMEGA, as well as upgraded nuclear and x-ray diagnostics, led to the >50-Gbar observation.

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    High-Performance Cryogenic Experiments

    A comparison of the measured hot-spot pressure with simulated values showing that >50-Gbar pressure was achieved in direct-drive layered DT cryogenic implosions on OMEGA. A combination of laser and target improvements on OMEGA, as well as upgraded nuclear and x-ray diagnostics, led to the >50-Gbar observation.

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    Magnetic-Field Plasma Targets

    Targets prepared for the magnetic-field plasma experiments for the National Laser Users' Facility, led by Chicago University to measure magnetic-field amplification in a turbulent medium. Target Fabrication Technician, Michelle Evans, is shown inspecting one of the targets in the inset.

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    Magnetic-Field Plasma Targets

    Targets prepared for the magnetic-field plasma experiments for the National Laser Users' Facility, led by Chicago University to measure magnetic-field amplification in a turbulent medium. Target Fabrication Technician, Michelle Evans, is shown inspecting one of the targets in the inset.

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    Summer High School Research Program

    Participants in the 2015 Summer High School Research Program. The program provides unique research opportunities to talented regional high school students and is led by Dr. Stephen Craxton.

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    Summer High School Research Program

    Participants in the 2015 Summer High School Research Program. The program provides unique research opportunities to talented regional high school students and is led by Dr. Stephen Craxton.

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    Rayleigh–Taylor Experiments on the NIF

    Rayleigh–Taylor instability growth from preimposed modulations is studied at the National Ignition Facility (NIF) with cone-in-shell targets and face-on, x-ray radiography. The inset shows radiography data through a modulated shell, optical-density growth, and a self-emission image of an imploding capsule with imposed surface modulations.

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    Rayleigh–Taylor Experiments on the NIF

    Rayleigh–Taylor instability growth from preimposed modulations is studied at the National Ignition Facility (NIF) with cone-in-shell targets and face-on, x-ray radiography. The inset shows radiography data through a modulated shell, optical-density growth, and a self-emission image of an imploding capsule with imposed surface modulations.

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    Multiple-Pulse Driver Line

    The multiple-pulse driver line (MPD) provides on-shot co-propagation of two separate pulse shapes in all 60 OMEGA beams. Smoothing by spectral dispersion (SSD) bandwidth is applied to the picket pulse shape (pulse A, inset) generated by the SSD driver. No bandwidth is applied to the pulse generated by the Phoenix (PHX) driver (pulse B). Shown aligning a diagnostic upgrade supporting MPD are Laboratory Engineer, Jeremy Zenkar (left), and OMEGA System Scientist, Tanya Kosc (right).

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    Multiple-Pulse Driver Line

    The multiple-pulse driver line (MPD) provides on-shot co-propagation of two separate pulse shapes in all 60 OMEGA beams. Smoothing by spectral dispersion (SSD) bandwidth is applied to the picket pulse shape (pulse A, inset) generated by the SSD driver. No bandwidth is applied to the pulse generated by the Phoenix (PHX) driver (pulse B). Shown aligning a diagnostic upgrade supporting MPD are Laboratory Engineer, Jeremy Zenkar (left), and OMEGA System Scientist, Tanya Kosc (right).

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    MagLIF

    Magnetic liner inertial fusion (MagLIF) is a new fusion scheme. In collaboration with Sandia National Laboratories, a scaled version of MagLIF (small-MagLIF) is being investigated at the Omega Laser Facility to study the physics of the scheme.

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    MagLIF

    Magnetic liner inertial fusion (MagLIF) is a new fusion scheme. In collaboration with Sandia National Laboratories, a scaled version of MagLIF (small-MagLIF) is being investigated at the Omega Laser Facility to study the physics of the scheme.

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    Direct EOS Measurements

    Absolute equation-of-state (EOS) measurements of porous, hydrocarbon-based foams have been carried out on the OMEGA EP Laser System. The experiment used a target composed of a plastic ablator, a metal pusher, and a resorcinol-formaldyhyde foam located inside a plastic tube. Research Engineer, Chad Mileham, is shown mounting the imaging nose cone to the PJX streak camera prior to the experiments.

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    Direct EOS Measurements

    Absolute equation-of-state (EOS) measurements of porous, hydrocarbon-based foams have been carried out on the OMEGA EP Laser System. The experiment used a target composed of a plastic ablator, a metal pusher, and a resorcinol-formaldyhyde foam located inside a plastic tube. Research Engineer, Chad Mileham, is shown mounting the imaging nose cone to the PJX streak camera prior to the experiments.

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    National Laser Users' Facility (NLUF)

    Collisionless shock waves are common in astrophysics. One possible cause for the generation of collisionless shocks is the Weibel instability. NLUF and Laboratory Basic Science experiments at the Omega Laser Facility (inset) show evidence of Weibel-generated magnetic fields in opposing plasma flows. In the background is a composite x-ray, optical, and radio image of the supernova remnant W49B thought to have been generated by a gamma-ray burst possibly induced by the Weibel instability.

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    National Laser Users' Facility (NLUF)

    Collisionless shock waves are common in astrophysics. One possible cause for the generation of collisionless shocks is the Weibel instability. NLUF and Laboratory Basic Science experiments at the Omega Laser Facility (inset) show evidence of Weibel-generated magnetic fields in opposing plasma flows. In the background is a composite x-ray, optical, and radio image of the supernova remnant W49B thought to have been generated by a gamma-ray burst possibly induced by the Weibel instability.

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