FY06 LDRD Final Report "The Creation of a Neutron Star Atmosphere"

Klein, R I ; Remington, B ; Moon, S ; MacKinnon, A ; Patel, P ; Ruytov, D ; Wilks, S ; Pape, S L

Lawrence Livermore National Laboratory

关键词: Acceleration;    Heating;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Energy Sources;    Neutron Stars;   

DOI  :  10.2172/902271
RP-ID  :  UCRL-TR-228633
RP-ID  :  W-7405-ENG-48
RP-ID  :  902271

美国|英语

来源: UNT Digital Library

【 摘 要 】

We have taken the initiative to examine whether experiments on HED facilities, present and future, could achieve the extreme scaled conditions relevant to accreting neutron star atmospheres and accretion disks around black holes. The preliminary conclusion from this detailed scaling assessment is that if an exact scaled version of the photon bubble instability physics is desired, this will require experiments with (simultaneously) spatial scales of order {approx}1 mm, temperatures of order {approx}5 keV, magnetic fields of order a hundred megaGauss, and time scales of order several hundred psec. Aspects (subsets) of this physics can be studied under less demanding conditions. To achieve the temperatures required in targets of order several optical depths, we come to the preliminary conclusion that we would require an energy source that delivers of order of a megajoule of energy into a high Z target. A conceptual design for such an experiment could be to use the energy from a high gain ignition NIF capsule as our principle source of heating and acceleration whereby the target is in close proximity to the ignition capsule and then use external petawatt lasers to develop the magnetic fields required.