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Fluorescence Diagnostic at NDCX: Results and Prospects

Explore results and prospects of fluorescence diagnostic at NDCX, including beam-induced and plasma-induced spectra, experimental findings, and strategies to enhance PIF/BIF ratio in a bright environment.

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Fluorescence Diagnostic at NDCX: Results and Prospects

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  1. 09/17/2008Fluorescence diagnostic at NDCX results and prospects F. Becker1, P. Hauville3, P.A. Ni2, F.M. Bieniosek2 Gesellschaft für Schwerionenforschung GSI, Darmstadt Lawrence Berkeley National Laboratory LBNL, Berkeley École Nationale Supérieure de Physique ENSPG, Grenoble

  2. Outline 1/3 • BIF-monitor requirements at NDCX target chamber: • Results 2007 – Al plasma spectrum • BIF-monitor in a bright environment • Latest experimental results for (Xe, Kr, Ar, Ne, N2): • Beam induced spectra recorded in DB 1 • Plasma induced spectra recorded in TC • Beam induced spectra recorded in TC • Experimental prospects: • How to increase the PIF/BIF-ratio? • Puff-valve and gas jet for increased signal

  3. Vacuum gauge Blackened walls Any fluorescent gas equally distributed 150mm flange ION beam Valve Viewport Lens Image-Intensifier CCD FireWire-Camera BIF transverse beam profile monitor

  4. BIF transverse beam profile monitor

  5. BIF transverse beam profile monitor - monitor successfully applied at DB 1 (Okt. 2007)

  6. Results 2007 – Al plasma spectrum Al 470A, basepressure 470A, p=10-5 Torr N2 660A, basepressure N2

  7. BIF-monitor in a bright environment - are there lines just excited by the beam? - can it be discriminated against neighbor-lines?

  8. Outline 2/3 • BIF-monitor requirements at NDCX target chamber: • Results 2007 – Al plasma spectrum • BIF-monitor in a bright environment • Latest experimental results for (Xe, Kr, Ar, Ne, N2): • Beam induced spectra recorded in DB 1 • Plasma induced spectra recorded in TC • Beam induced spectra recorded in TC • Experimental prospects: • How to increase the PIF/BIF-ratio? • Puff-valve and gas jet for increased signal

  9. Beam induced spectra recorded in DB 1

  10. Beam induced spectra recorded in DB 1 ?

  11. Beam induced spectra recorded in DB 1 Xe II @ 537 nm Kr II @ 484 nm ?

  12. Plasma induced spectra recorded in TC

  13. Beam induced spectra recorded in TC

  14. Beam induced spectra recorded in TC

  15. How reliable is the calibration?

  16. How reliable is the calibration?

  17. The PIF/BIF ratio • no lines just excited by the beam • PIF/BIF ratio for Xe is between 800 and 4000 [P. Hauville]

  18. Outline 3/3 • BIF-monitor requirements at NDCX target chamber: • Results 2007 – Al plasma spectrum • BIF-monitor in a bright environment • Latest experimental results for (Xe, Kr, Ar, Ne, N2): • Beam induced spectra recorded in DB 1 • Plasma induced spectra recorded in TC • Beam induced spectra recorded in TC • Experimental prospects: • How to increase the PIF/BIF-ratio? • Puff-valve and gas jet for increased signal

  19. Thank You 

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