04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

1

09/17/2008

Fluorescence diagnostic at NDCX results and prospects

F. Becker1, P. Hauville3, P.A. Ni2, F.M. Bieniosek2

1) Gesellschaft für Schwerionenforschung GSI, Darmstadt

2) Lawrence Berkeley National Laboratory LBNL, Berkeley

3) École Nationale Supérieure de Physique ENSPG, Grenoble

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

2Outline 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

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

3BIF transverse beam profile monitor

ION beam

Blackened wallsVacuum gauge

Valve

Viewport

150mm flange

LensImage-IntensifierCCD FireWire-Camera

Any fluorescent gasequally distributed

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

4BIF transverse beam profile monitor

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

5BIF transverse beam profile monitor

- monitor successfully applied at DB 1 (Okt. 2007)

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6Results 2007 – Al plasma spectrum

470A, basepressure470A, p=10-5 Torr N2

660A, basepressure

Al

N2

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

7BIF-monitor in a bright environment

- are there lines just excited by the beam?- can it be discriminated against neighbor-lines?

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

8Outline 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

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

9Beam induced spectra recorded in DB 1

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

10Beam induced spectra recorded in DB 1

?

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

11Beam induced spectra recorded in DB 1

?

Xe II @ 537 nm

Kr II @ 484 nm

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

12Plasma induced spectra recorded in TC

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

13Beam induced spectra recorded in TC

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

14Beam induced spectra recorded in TC

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

15How reliable is the calibration?

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

16How reliable is the calibration?

BIF_Calib

y = -0,3003x + 727,59

R2 = 0,9998

400

450

500

550

600

650

700

0 200 400 600 800 1000 1200

Lamda

Linear (Lamda)

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

17The PIF/BIF ratio

• no lines just excited by the beam

• PIF/BIF ratio for Xe is between 800 and 4000 [P. Hauville]

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

18Outline 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

04/22/23The Heavy Ion Fusion Science Virtual National Laboratory

19

Thank You