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DIAGNOSTICS

  • Omega diagnostic status page

  • Spherical Crystal Imager (SCI)

    • Uses TIMs 4 & 6​

    • Crystal in 6

    • Needs additional shielding if using an exploding pusher

  • HERIE/HXIP

    • 9 channel IP based spectrometer for measuring bremsstrahlung x-rays generated by hot electrons. 

    • Absolutely calibrated, 

    • time integrated

    • If using exploding pushers this diagnostic needs a shot without expl. push

  • KB Framed​​​

    • Port H13

    • 5um res

    • 2-7 keV x-ray energy range

    • Time resolved

    • Blast windows etc = 11 mil Be

    • Field of view 460um in vertical direction

  • HXRD

    • Fixed

    • hot electron spec (via emitted x-rays) 

    • time-resolved 

    • 4 channels

    • absolute hot-electron energy

    • hot-electron temperature

  • Thompson scattering

    • 2/3/4 omega (Froula)

    • Thompson scattering: TIM 6, P9 for beam

  • Pinhole cameras

    • XRPHCs

    • 6-8 used on evergy shot, 

    • enables spherical capsule alignment to within 2um and beam pointing to with 10um

  • X-ray framing cameras

    • can be fielded on all 6 TIMS, 

    • 40, 80,200,300, 400 or 1000ps resolution

    • can use 4, 2 or 1 strip (why use less? field of view?)

  • KB microscopes (fixed):

    • see pp 2.84

    • KB1, port H8, 5um res, 2-8keV x-ray energy range

    • KB2, port H9, 5um res, 2-8keV x-ray energy range, for GMXI

    • KB3, port H13, 3um res, 2-7keV x-ray energy range

    • 2 others available

  • GMXI

    • ICF targets resolved in time, space and spectrum

    • 5um resolution

    • 2-8keV

    • port H12

  • Streak cameras

    • 6 optical

    • X-ray: TIM based, combatible with:

  • KB microscopes

  • Multiple imager (2d images with 10ps resolution)

  • Spectroscopy 

  • MMI

    • Pinhole array X-ray spectrometer (can be gated): 

    • 200 2D quasi-mono energetic, 

    • time integrated x-ray images covering a wide x-ray energy range. 

    • Can measure spatial variation in Areal density. 

    • Temperature and density maps of implosion plasmas.

  • Neutron diagnostics: Various

  • Charged particle diagnostics Various

  • FABS (Full aperature backscatter stations): Temporally and spectrally resolved spectra of backscattered light 

    • On beams 25 and 30 (23 degree cone)

    • SRS (400-700nm), 1st order

      • Can use in higher order for better resolution​

      • Can infer plasma temp from TPD emission

    • SBS (351+/-1nm) regions

    • 3 fielded routinely

    • all light beams 25 & 30

    • 351nm light also collected in H17 diagnostic port

    • Accuracy: 5-10%

  • NBI (Near backscatter Imaging) NBI Details

    • 2 cameras, looking at light back scattered by the target into region around both beams 25 and 30 (see FABS) (both cameras see both beams)

    • one filtered at 351nm +/-10 (SBS), 

    • the other 400-700nm (SRS)

    • time integrated

    • Omega manual section 2.5.10

  • x-ray backlighters (2.5.11)

    • Point projection better than large area backlighters

    • ~2keV ideal for imaging Omega implosions

    • table 2.7 in Omega manual very useful

  • VISAR(Tom Bailey)

    • 2 channels

    • 24ns max laser duaration

  • SOP(compatible with simulataneous VISAR usage)

    • Multiple wavelengths allowing colour-temperature measurments

  • Cryogenic target Characterisation diagnostic

  • HENEX (high energy electronic x-ray diagnostic): 

    • spectra over 1.1-20.1keV range. 

    • 5 channels.

  • Transmitted Beam Diagnostic (TBD): 

    • fraction of 2 or 3 omega light transmitted through underdense plasma. 

    • Measures beam spray, beam defelction and absoliute transmitted power.

  • High resolution x-ray imaging (HRXI): 

    • High resolution(5um) 

    • time resolved (30ps) 

    • x-ray imaging diagnostic (up to 6keV)

  • DMX (Dante)

    • x-ray spectrometer 50eV to 20KeV

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