A full aperture backscatter system (FABS) is currently in development on the Orion laser at AWE to measure scattered light from the stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) processes. The light is to be collected through the full aperture of the final optic assembly and traverse back down the beam path, with fractions of this light being directed to an optics table. By measuring the energy of this backscattered light, it is possible to gain insight into some of the laser-plasma instabilities that are present on the laser system and should give an indication of some of the scattered light losses due to the SBS and SRS processes. The uncontrolled scattered light can lead to hotter electrons, which then preheat the target causing a degradation in compression and can inhibit ignition in inertial confinement fusion experiments, as well as secondary instabilities whereby the scattered light may in itself cause further LPIs, such as two-ion decay or the Langmuir decay instability. The FABS diagnostic on Orion is planned to enhance the plasma diagnostics suite available and provide quantitative guidance on increasing the energy coupling. Current progress includes the characterization of filters and, hence, a broadband xenon lamp to be used in measuring the transmission efficiency of the optics chain, desktop alignment of the backscatter optics, and characterization of the streak cameras.

31 Mar 2022·Nature

Publisher Correction: Burning plasma achieved in inertial fusion

Author: Callahan, D A ; Benedetti, L R ; Schlossberg, D J ; Spears, B K ; Nora, R ; Milovich, J L ; Döppner, T ; Gatu Johnson, M ; Christopherson, A R ; Kritcher, A L ; Meezan, N B ; Farmer, W A ; Celliers, P M ; Kruse, M K G ; Chang, B ; Lemos, N C ; Marinak, M M ; Heebner, J E ; Robey, H F ; Dittrich, T R ; Ross, J S ; Kerbel, G D ; Clark, D S ; Young, C V ; Weber, C R ; Briggs, T M ; Hammel, B A ; Bionta, R M ; Hsing, W W ; Landen, O L ; Volegov, P L ; Morton, J W ; Town, R P J ; Glenzer, S H ; Bradley, D K ; Sherlock, M W ; Patel, P K ; Masse, L ; Nikroo, A ; Herrmann, M C ; Kerr, S M ; Izumi, N ; Braun, T ; Kong, C ; Woodworth, B N ; Kilkenny, J ; Stadermann, M ; Moody, J D ; Yamaguchi, M ; Woods, D T ; Geppert Kleinrath, H ; Field, J E ; Casey, D T ; Jones, O ; Hernandez, V J ; Langer, S ; Sater, J ; Ping, Y ; Springer, P T ; Geppert Kleinrath, V ; Jarrott, L C ; Grim, G P ; Rubery, M S ; Suter, L J ; Amendt, P A ; Berzak Hopkins, L ; Gaffney, J ; Betti, R ; Ali, S J ; Atherton, L J ; MacGowan, B J ; Fittinghoff, D ; Baker, K L ; Crippen, J W ; Rinderknecht, H ; Kim, Y ; Lindl, J D ; Shin, S ; Ratledge, M ; Mariscal, D A ; Moore, A S ; Jeet, J ; Le Pape, S ; Larson, D ; Yang, S T ; Michel, P A ; Mackinnon, A J ; Schiaffino, S ; Trosseille, C ; MacLaren, S A ; Hall, G N ; Haan, S ; Tubman, E R ; Di Nicola, J-M G ; Smalyuk, V A ; Chen, H ; Rosen, M ; Zylstra, A B ; Ho, D D ; Patel, M V ; Biener, J ; Millot, M ; Murphy, T ; Tommasini, R ; Choate, C ; Peterson, J L ; Humbird, K D ; Pak, A ; Pollock, B B ; Bond, E J ; Bachmann, B ; Dewald, E L ; Zimmerman, G B ; Hahn, K D ; Bailey, D ; Newman, K ; Kustowski, B ; Holder, J P ; Rice, N G ; Stoupin, S ; Hinkel, D E ; Frenje, J ; Bhandarkar, S D ; Kroll, J J ; MacDonald, M J ; Strozzi, D J ; Huang, H ; Khan, S F ; Sequoia, K ; Wilde, C H ; Herrmann, H ; Hohenberger, M ; Sepke, S M ; MacPhee, A G ; Bruhn, M W ; Harte, J ; Scott, H A ; Ralph, J E ; Divol, L ; Pelz, L J ; Edwards, M J ; Ma, T ; Meaney, K ; Koning, J M ; Schroeder, C R ; Thomas, C A ; Schneider, M B ; Hurricane, O A ; Van Wonterghem, B M ; Birge, N W ; Wild, C ; Hartouni, E ; Widmann, K ; Salmonson, J D ; Chapman, T ; Marley, E V

27 Jan 2022·Nature

Burning plasma achieved in inertial fusion

Article

Author: Callahan, D A ; Benedetti, L R ; Schlossberg, D J ; Döppner, T ; Nora, R ; Milovich, J L ; Spears, B K ; Gatu Johnson, M ; Christopherson, A R ; Kritcher, A L ; Meezan, N B ; Celliers, P M ; Farmer, W A ; Kruse, M K G ; Chang, B ; Lemos, N C ; Marinak, M M ; Heebner, J E ; Robey, H F ; Dittrich, T R ; Ross, J S ; Kerbel, G D ; Young, C V ; Clark, D S ; Weber, C R ; Briggs, T M ; Hammel, B A ; Bionta, R M ; Hsing, W W ; Landen, O L ; Volegov, P L ; Morton, J W ; Town, R P J ; Glenzer, S H ; Bradley, D K ; Sherlock, M W ; Patel, P K ; Masse, L ; Nikroo, A ; Herrmann, M C ; Kerr, S M ; Izumi, N ; Braun, T ; Kong, C ; Stadermann, M ; Woodworth, B N ; Kilkenny, J ; Moody, J D ; Yamaguchi, M ; Woods, D T ; Geppert Kleinrath, H ; Field, J E ; Casey, D T ; Jones, O ; Hernandez, V J ; Langer, S ; Sater, J ; Ping, Y ; Geppert Kleinrath, V ; Springer, P T ; Jarrott, L C ; Grim, G P ; Rubery, M S ; Suter, L J ; Amendt, P A ; Berzak Hopkins, L ; Gaffney, J ; Betti, R ; Ali, S J ; Atherton, L J ; MacGowan, B J ; Fittinghoff, D ; Baker, K L ; Crippen, J W ; Rinderknecht, H ; Lindl, J D ; Kim, Y ; Shin, S ; Ratledge, M ; Mariscal, D A ; Moore, A S ; Jeet, J ; Le Pape, S ; Larson, D ; Yang, S T ; Michel, P A ; Mackinnon, A J ; Schiaffino, S ; Trosseille, C ; MacLaren, S A ; Hall, G N ; Haan, S ; Tubman, E R ; Di Nicola, J-M G ; Smalyuk, V A ; Chen, H ; Rosen, M ; Zylstra, A B ; Ho, D D ; Patel, M V ; Biener, J ; Millot, M ; Murphy, T ; Tommasini, R ; Choate, C ; Peterson, J L ; Humbird, K D ; Pak, A ; Pollock, B B ; Bond, E J ; Bachmann, B ; Dewald, E L ; Zimmerman, G B ; Hahn, K D ; Bailey, D ; Holder, J P ; Kustowski, B ; Newman, K ; Stoupin, S ; Rice, N G ; Hinkel, D E ; Bhandarkar, S D ; Frenje, J ; Kroll, J J ; MacDonald, M J ; Strozzi, D J ; Huang, H ; Khan, S F ; Sequoia, K ; Wilde, C H ; Sepke, S M ; Hohenberger, M ; Herrmann, H ; MacPhee, A G ; Bruhn, M W ; Harte, J ; Scott, H A ; Ralph, J E ; Edwards, M J ; Pelz, L J ; Divol, L ; Ma, T ; Meaney, K ; Koning, J M ; Schroeder, C R ; Thomas, C A ; Schneider, M B ; Hurricane, O A ; Van Wonterghem, B M ; Birge, N W ; Wild, C ; Widmann, K ; Hartouni, E ; Salmonson, J D ; Chapman, T ; Marley, E V

AbstractObtaining a burning plasma is a critical step towards self-sustaining fusion energy1. A burning plasma is one in which the fusion reactions themselves are the primary source of heating in the plasma, which is necessary to sustain and propagate the burn, enabling high energy gain. After decades of fusion research, here we achieve a burning-plasma state in the laboratory. These experiments were conducted at the US National Ignition Facility, a laser facility delivering up to 1.9 megajoules of energy in pulses with peak powers up to 500 terawatts. We use the lasers to generate X-rays in a radiation cavity to indirectly drive a fuel-containing capsule via the X-ray ablation pressure, which results in the implosion process compressing and heating the fuel via mechanical work. The burning-plasma state was created using a strategy to increase the spatial scale of the capsule2,3 through two different implosion concepts4–7. These experiments show fusion self-heating in excess of the mechanical work injected into the implosions, satisfying several burning-plasma metrics3,8. Additionally, we describe a subset of experiments that appear to have crossed the static self-heating boundary, where fusion heating surpasses the energy losses from radiation and conduction. These results provide an opportunity to study α-particle-dominated plasmas and burning-plasma physics in the laboratory.

News (Medical) associated with Atomic Weapons Establishment Plc

31 May 2023

·www.prnewswire.com

XRHealth Announces its Virtual Therapeutic Care Solution for the Lenovo VXR Utilizing Snapdragon Spaces

The Integration Enables Developers to Create Immersive Healthcare Experiences in AR/VR/MR With Lenovo's ThinkReality VRX that Supports Snapdragon Spaces XR Development Platform BOSTON, May 31, 2023 /PRNewswire/ -- XRHealth, a Boston-based developer and operator of virtual treatment rooms, announces today their adoption of Snapdragon Spaces™ XR Developer Platform for the Lenovo ThinkReality VRX. The integration will enable XRHealth developers to create immersive experiences in AR/VR/MR for the healthcare industry. Lenovo's ThinkReality VRX is one of the first headsets launched with Snapdragon Spaces to empower developers to expand the XR ecosystem. Lenovo ThinkReality VRX will now be preloaded with XRHealth therapeutic solutions. "Snapdragon Spaces is created to provide application developers the software tools to build immersive XR solutions and innovate using immersive technology," said Martin Herdina, Senior Director, Product Management, XR. "XR Health brings impressive technology to the table in their virtual healthcare and therapy solution, and Qualcomm Technologies, Inc. is excited to work with them as part of its rapidly growing XR enterprise ecosystem." Lenovo and Qualcomm Technologies have long worked together to expand the enterprise metaverse and virtual workspaces. With XRHealth's adoption of Snapdragon Spaces, developers will be able to create immersive VR healthcare experiences on devices powered by Snapdragon®, offering developers the option to develop VR, AR, or MR experiences on the leading headsets for training and collaboration in 3D. Lenovo's ThinkReality VRX headset that will support both Snapdragon Spaces and XRHealth will be available in Q3 of 2023. "We are excited to integrate our solution on Snapdragon Spaces and Lenovo ThinkReality VRX to enable developers to build innovative experiences that will revolutionize therapeutic care," says Eran Orr, CEO of XRHealth. "We are honored to join Qualcomm Technologies' first cohort of companies developing on VRX using Snapdragon Spaces technology." This announcement comes at the heels of XRHealth announcing a merger with Amelia Virtual Care which has created a XR therapeutic powerhouse, addressing both physical and mental health issues. XRHealth will demonstrate the headset at AWE in Santa Clara, CA during May 31-June 2 at Lenovo's booth #219 and Qualcomm's booth #205 at Hall A. About XRHealth XRHealth operates state-of-the-art therapeutic care Virtual Rooms, utilizing proprietary FDA and CE-registered medical Extended Reality (XR) technology (virtual and augmented reality). XRHealth integrates immersive XR technology, licensed clinicians, and advanced data analytics on one platform, providing a comprehensive therapeutic care solution for patients to receive treatment from the comfort of their home. The company offers a variety of patent-pending solutions from rehabilitation services to cognitive assessment and training to pain management. XRHealth works with several world-renowned U.S. healthcare providers, hospitals, and rehabilitation centers. Founded in 2016, XRHealth is headquartered in Boston, Massachusetts and its R&D center is located in Tel-Aviv, Israel. . Snapdragon and Snapdragon Spaces are trademarks or registered trademarks of Qualcomm Incorporated. Snapdragon branded products are products of Qualcomm Technologies, Inc. and/or its subsidiaries. Media Contact: DeeDee Rudenstein, [email protected] SOURCE XRHealth

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