Experimental investigation of laser ablation efficiency of metals

1998 ◽  
Author(s):  
Catherine Chaleard ◽  
Vincent Detalle ◽  
Sylvain Kocon ◽  
Jean-Luc Lacour ◽  
Corinne Nouvellon ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Laser Ablation ◽  
Ablation Efficiency

scholarly journals Femtosecond, picosecond, and nanosecond laser microablation: Laser plasma and crater investigation

2002 ◽  
Vol 20 (1) ◽  
pp. 67-72 ◽  
Author(s):  
A. SEMEROK ◽  
B. SALLÉ ◽  
J.-F. WAGNER ◽  
G. PETITE
Keyword(s):  
Laser Ablation ◽  
Theoretical Models ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Laser Beams ◽  
Limiting Factors ◽  
Nanosecond Laser ◽  
Ablation Efficiency ◽  
Nanosecond Pulses ◽  
Focused Laser Beams

Crater shapes and plasma plume expansion in the interaction of sharply focused laser beams (10 μm waist diameter, 60 fs–6 ns pulse duration) with metals in air at atmospheric pressure were studied. Laser ablation efficiencies and rates of plasma expansion were determined. The best ablation efficiency was observed with femtosecond laser pulses. It was found that for nanosecond pulses, the laser beam absorption, its scattering, and its reflection in plasma were the limiting factors for efficient laser ablation and precise material sampling with sharply focused laser beams. The experimental results obtained were analyzed with relation to different theoretical models of laser ablation.

Laser ablation efficiency during the production of Ag nanoparticles in ethanol at a low pulse repetition rate (1–10 Hz)

2016 ◽  
Vol 13 (10) ◽  
pp. 106002 ◽  
Author(s):  
M A Valverde-Alva ◽  
T García-Fernández ◽  
E Esparza-Alegría ◽  
M Villagrán-Muniz ◽  
C Sánchez-Aké ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Ag Nanoparticles ◽  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Pulse Repetition ◽  
Ablation Efficiency

Understanding laser ablation efficiency

SPIE Newsroom ◽  
2015 ◽  
Author(s):  
Juergen Sotrop ◽  
Jan Winter ◽  
Stephan Rapp ◽  
Heinz P. Huber
Keyword(s):  
Laser Ablation ◽  
Ablation Efficiency

Correlation between ablation efficiency and nanoparticle generation during the short-pulse laser ablation of metals

Laser Physics ◽  
2008 ◽  
Vol 18 (4) ◽  
pp. 374-379 ◽  
Author(s):  
J. Hermann ◽  
S. Noël ◽  
T. E. Itina ◽  
E. Axente ◽  
M. E. Povarnitsyn
Keyword(s):  
Laser Ablation ◽  
Pulse Laser ◽  
Pulse Laser Ablation ◽  
Short Pulse ◽  
Ablation Efficiency ◽  
Short Pulse Laser ◽  
Nanoparticle Generation

scholarly journals Stereotactic laser ablation as treatment for brain metastases that recur after stereotactic radiosurgery: a multiinstitutional experience

2016 ◽  
Vol 41 (4) ◽  
pp. E11 ◽  
Author(s):  
Mir Amaan Ali ◽  
Kate T. Carroll ◽  
Robert C. Rennert ◽  
Thomas Hamelin ◽  
Leon Chang ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Brain Metastases ◽  
Disease Progression ◽  
Stereotactic Radiosurgery ◽  
Corticosteroid Treatment ◽  
Significant Heterogeneity ◽  
Effective Treatment Option ◽  
Ablation Efficiency ◽  
Collective Experience ◽  
Risk Of Disease

OBJECTIVE Therapeutic options for brain metastases (BMs) that recur after stereotactic radiosurgery (SRS) remain limited. METHODS The authors provide the collective experience of 4 institutions where treatment of BMs that recurred after SRS was performed with stereotactic laser ablation (SLA). RESULTS Twenty-six BMs (in 23 patients) that recurred after SRS were treated with SLA (2 patients each underwent 2 SLAs for separate lesions, and a third underwent 2 serial SLAs for discrete BMs). Histological findings in the BMs treated included the following: breast (n = 6); lung (n = 6); melanoma (n = 5); colon (n = 2); ovarian (n = 1); bladder (n = 1); esophageal (n = 1); and sarcoma (n = 1). With a median follow-up duration of 141 days (range 64–794 days), 9 of the SLA-treated BMs progressed despite treatment (35%). All cases of progression occurred in BMs in which < 80% ablation was achieved, whereas no disease progression was observed in BMs in which ≥ 80% ablation was achieved. Five BMs were treated with SLA, followed 1 month later by adjuvant SRS (5 Gy daily × 5 days). No disease progression was observed in these patients despite ablation efficiency of < 80%, suggesting that adjuvant hypofractionated SRS enhances the efficacy of SLA. Of the 23 SLA-treated patients, 3 suffered transient hemiparesis (13%), 1 developed hydrocephalus requiring temporary ventricular drainage (4%), and 1 patient who underwent SLA of a 28.9-cm3 lesion suffered a neurological deficit requiring an emergency hemicraniectomy (4%). Although there is significant heterogeneity in corticosteroid treatment post-SLA, most patients underwent a 2-week taper. CONCLUSIONS Stereotactic laser ablation is an effective treatment option for BMs in which SRS fails. Ablation of ≥ 80% of BMs is associated with decreased risk of disease progression. The efficacy of SLA in this setting may be augmented by adjuvant hypofractionated SRS.

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