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BEGIN:VEVENT
DTSTAMP:20260428T075728Z
DTSTART;VALUE=DATE-TIME:20221101T150000
DTEND;VALUE=DATE-TIME:20221101T160000
SUMMARY:Robert Paddock (Oxford): Foams for Inertial Confinement Fusion: M
 odelling and Experiments
TZID:Europe/London
UID:20221101-8a17841a83a32c400183a41182431213@warwick.ac.uk
CREATED:20221011T134752Z
DESCRIPTION:Capsules containing wetted-foam layers (a low-density CH foam
 \, saturated with liquid deuterium-tritium) are of major interest for in
 ertial fusion energy applications. The convergence ratio (or degree of c
 ompression) of such implosions can be controlled via the initial tempera
 ture of the wetted foam layer\, making it possible to achieve low conver
 gence ratio implosions where instability growth is minimised. Such implo
 sions have been demonstrated previously on the NIF. In this talk\, I wil
 l first discuss the results of a large-scale simulation campaign to expl
 ore a low-instability parameter space achieved through the use of these 
 capsules in a direct-drive configuration\, how this could be paired with
  promising new technologies (such as ArF lasers or auxiliary heating) to
  achieve high gain\, and ‘hydrodynamic equivalent’ capsules which could 
 enable this regime to be tested experimentally on current facilities. Se
 condly\, I will discuss a recent VULCAN experiment to measure the princi
 ple hugoniot of TMPTA plastic foam relevant to these hydrodynamic equiva
 lent capsules (and to IFE more broadly). VISAR was used to measure the s
 hock velocity of both the foam and a quartz reference layer\, while stre
 aked optical pyrometry was used to measure the temperature of the shocke
 d material. Preliminary results suggest that\, for the 20 – 120 GPa pres
 sure range accessed\, this material can be well described using the equa
 tion of state of the homogeneous medium at the foam density.
LOCATION:PLT
CATEGORIES:CFSA Seminar
LAST-MODIFIED:20221011T134752Z
ORGANIZER;CN=Anne-Marie Broomhall:
END:VEVENT
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