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UID:dbdad04a713f0606b86100a058121550
DTSTAMP:20261022T160634Z
SUMMARY:SPC Seminar – Plasma – Farhat Beg (UCSD)
DESCRIPTION:Speaker: Farhat Beg (UCSD)\nTitle: Proton Heating in Integrated
  Proton Fast Ignition Experiments\nAbstract: Proton fast ignition (PFI) is
  an alternative inertial confinement fusion (ICF) concept that promises hi
 gh gain suitable for inertial fusion energy applications. In this concept\
 , a short-pulse\, high-intensity laser is used to generate an energetic pr
 oton beam that efficiently couples’ energy into a pre-compressed fuel as
 sembly. This enables ignition conditions to be reached with less stringent
  symmetry and driver energy requirements than in the conventional hot-spot
  approach.\nWe report on the first integrated PFI campaign at the Omega La
 ser Facility that included both the compression and ignition phases to mea
 sure the temperature increase in the compressed core due to proton heating
 . In the recent experiment\, we increased the short-pulse laser intensity 
 by a factor of 6 and observed a 3× improvement in the proton maximum cuto
 ff energy and a 6× enhancement in the yield of >10 MeV protons that prima
 rily heat the core. X-ray spectroscopy data reveal dominant Heα and Heβ 
 features consistent with heating of the compressed core. Implosion traject
 ories obtained from radiation-hydrodynamics simulations agree well with ex
 periments and indicate an implosion velocity of approximately 70 km/s for 
 an implosion energy of 10 kJ. A detailed comparison of the measured implos
 ion trajectories\, velocities\, and proton energy spectra with radiation-h
 ydrodynamics and PIC simulations will be presented.
URL:https://www.imperial.ac.uk/events/215510/spc-seminar-plasma-farhat-beg-
 ucsd/
DTSTART;TZID=Europe/London:20261027T150000
DTEND;TZID=Europe/London:20261027T160000
LOCATION:630\, Blackett Building\, South Kensington Campus\, Imperial Colle
 ge London\, London\, SW7 2AZ\, United Kingdom
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