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SUMMARY:12.18 Design and Initial Operation of a Laser Blow-Off System on t
 he DIII-D Tokamak
DTSTART;VALUE=DATE-TIME:20180419T033100Z
DTEND;VALUE=DATE-TIME:20180419T053100Z
DTSTAMP;VALUE=DATE-TIME:20260711T055010Z
UID:indico-contribution-205@None
DESCRIPTION:Speakers: Tomas Odstrcil (MIT Plasma Science and Fusion Center
 )\, Nathaniel Howard (MIT Plasma Science and Fusion Center)\, Rui Vieira (
 MIT Plasma Science and Fusion Center)\, Jerry Hughes (MIT Plasma Science a
 nd Fusion Center)\, Rick Leccacorvi (MIT Plasma Science and Fusion Center)
 \, Josh  Stillerman (MIT Plasma Science and Fusion Center)\, Willy Burke (
 MIT Plasma Science and Fusion Center)\, Tom Toland (MIT Plasma Science and
  Fusion Center)\, S Pierson (MIT Plasma Science and Fusion Center)\, Du De
 tao (General Atomics)\, Thomas Carlstrom (General Atomics)\nA new laser bl
 ow-off (LBO) diagnostic was recently installed on the DIII-D tokamak to en
 able cutting-edge studies of both impurity and electron heat transport in 
 reactor-relevant plasma conditions.  Utilizing a high energy (up to 1.2 J)
 \, pulsed (50 Hz) Nd:YAG laser and fast\, piezo-electric steering optics\,
  this new system is capable of introducing multiple\, impurity injections 
 into a single DIII-D plasma discharge with precise timing.  Control of the
  laser energy combined with remote control of the beam size and focus allo
 w for arbitrary selection of both the energy density incident on coated ta
 rget films and the number of ablated particles.  These capabilities provid
 e a means for efficient introduction of a wide range of target materials (
 Li to W) into DIII-D plasmas\, enabling the study of trace\, non-intrinsic
 \, low and high-Z impurity transport. Alternatively\, the system can also 
 introduce larger\, perturbing amounts of impurities that can be used for c
 old pulse propagation studies and validation of atomic physics data.  Impu
 rities introduced via this technique will be tracked using the suite of DI
 II-D spectroscopic diagnostics (SXR\, CER\, etc.) to better understand the
 ir transport in a range of DIII-D plasma conditions.  In this presentation
 \, we will provide a detailed descriptio\n\nhttps://fusion.gat.com/confere
 nce/event/80/contributions/205/
LOCATION:Paradise Point Resort & Spa
URL:https://fusion.gat.com/conference/event/80/contributions/205/
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