Optical diagnostics for the pulsed laser deposition of YBa 2 Cu 3 O 7-x superconducting wires

Druffner, Carl J.; Kee, Patrick D.; Lange, Matthew A.; Perram, Glen P.; Biggers, Rand R.; Barnes, Paul N.

doi:10.1117/12.548709

Cited by 1 publication

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“…[56] In addition, Druffner noted the spatial distribution of Ba and Cu differed significantly, with the Cu angular distribution being more sharply peaked than Ba, i.e., Cu had a greater concentration in the interior of the plume, at the point of peak intensity than Ba. [25] Because the electronic temperature may change during observation, and the concentration of emitters may also change during data collection, a careless analysis of the emission spectra could lead to a wrong conclusion.…”

Section: Temporal Corrections To Electron-impact/lte Modelmentioning

confidence: 99%

“…The most efficient technique for analyzing spectra would be to switch from the interactive Peakfit with film critical currents, extension from 2D to 3D may add additional fidelity to this technique. [25] Appendix A. Calibration…”

Section: Measurement Of Ion Temperatures Would Indicate Whether Ion Amentioning

confidence: 99%

“…Time-of-flight measurements have included optical [25,26,36,68] and ion probe time-of-flight measurements [29,38], which have been very successful at characterizing the kinetic energy of ablation plumes according to free streaming, drag, or shock models, depending on the stage of the plume evolution. [36] Spectroscopic techniques have included absorption [37] and emission spectroscopy [8-10, 27-29, 91], as well as laser induced fluorescence.…”

Section: Introductionmentioning

confidence: 99%

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Electronic State Distributions of YBa₂Cu₃O_7-x Laser-Ablated Plumes

Kee

Perram

2010

Appl Spectrosc

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The application of spectral and imagery diagnostics to YBa 2 Cu 3 O 7 (YBCO) laser-ablated plumes was systematically studied to determine their effectiveness for process control. Emission signatures were collected for plumes created by ablating bulk YBCO with a pulsed laser source. A KrF (λ=248 nm) laser source operating at 4-10 J/cm 2 at a 4-10 Hz pulse repetition frequency was used to ablate a bulk YBCO target at O 2 background pressures ranging from 50 to 400 mTorr. Emission spectra were collected over the 500 to 860 nm bandpass at distances from the target ranging from 31.4 to 55.0 mm. Of 87 observed emission lines, 76 were assigned to specific transitions with the aid of calibration lamps and reference to tables of energy levels. Line fluences were corrected for self-absorption, and electronic state distributions were calculated using the most recent NIST transition probabilities.

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Section: Temporal Corrections To Electron-impact/lte Modelmentioning

confidence: 99%

Section: Measurement Of Ion Temperatures Would Indicate Whether Ion Amentioning

confidence: 99%