Ionisation of methyl iodide clusters using nanosecond laser pulses: detection of multiply charged positive ions, negative ions and energetic electrons

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 8887-8894 ◽  
Author(s):  
Soumitra Das ◽  
Pramod Sharma ◽  
Purav M. Badani ◽  
Rajesh K. Vatsa
Keyword(s):  
Methyl Iodide ◽  
Mass Spectrometer ◽  
Time Of Flight ◽  
Negative Ions ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Cluster Interaction ◽  
Positive Ions ◽  
Multiply Charged ◽  
Nanosecond Laser Pulses

Methyl iodide clusters have been ionised using laser pulses of intensity ∼109 W cm−2 at 266, 355, 532 and 1064 nm and the ions produced in the laser–cluster interaction were analysed with a time-of-flight mass spectrometer.

Role of electron heating in efficient interaction of a nanosecond laser with the cluster media: a case study on tetrahydrofuran cluster system

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 87897-87904 ◽  
Author(s):  
Pramod Sharma ◽  
Soumitra Das ◽  
Rajesh K. Vatsa
Keyword(s):  
Mass Spectrometer ◽  
Time Of Flight ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Electron Heating ◽  
Flight Mass Spectrometer ◽  
System P ◽  
Nanosecond Laser Pulses

Interaction of tetrahydrofuran clusters with nanosecond laser pulses has been investigated at 532 and 1064 nm, using a time-of-flight mass spectrometer and home-built electron analyzer setup.

scholarly journals Distribution and formation of particles produced by laser ablation of cyclotetramethylene tetranitramine

2017 ◽  
Vol 35 (3) ◽  
pp. 391-396 ◽  
Author(s):  
W. Zhang ◽  
R. Shen ◽  
Y. Ye ◽  
L. Wu ◽  
P. Zhu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Laser Ablation ◽  
Solid State ◽  
Mass Spectrometer ◽  
Time Of Flight ◽  
Negative Ions ◽  
Solid State Laser ◽  
Laser Initiation ◽  
Positive Ions ◽  
Cyclotetramethylene Tetranitramine

AbstractAn experimental investigation into laser ablation of secondary explosives, cyclotetramethylene tetranitramine (HMX), has been carried out by using a solid-state laser at the wavelength of 1064 nm. The ion particles of decomposition were detected by using a time-of-flight mass spectrometer. Possible attributions of both negative ions and positive ions were obtained. Some obvious peaks were found atm/z= 18, 28, 46, 60, and 106, corresponding to H2O, CO/N2/H2CN, NO2, CH2NO2/N2O2, and N(NO2)2/CH2(NO2)2, respectively. According to the distribution of the particles, three possible pathways were proposed to explain the process of particles. The results may shed some light on the possible decomposition mechanism of HMX under laser initiation.

Formation of Periodical Sub-Micron Sized Structures on Silicon by Interfered Nanosecond Laser Pulses

2010 ◽  
Vol 97-101 ◽  
pp. 3803-3806
Author(s):  
Yong Xiang Hu ◽  
Heng Zhang ◽  
Zheng Qiang Yao
Keyword(s):  
Cost Effective ◽  
Laser Pulses ◽  
Laser Beams ◽  
Nanosecond Laser ◽  
Effective Technique ◽  
First Order ◽  
Direct Fabrication ◽  
Cost Effective Technique ◽  
Nanosecond Laser Pulses ◽  
Micro Structuring

Laser interference micro-structuring is a relatively efficient and cost-effective technique for fabricating periodical micro-nano-structuring surfaces. The direct fabrication of sub-micron sized dot array on silicon was performed by four interfering nanosecond laser beams with a diffractive beam splitter. The mechanism to form the dot array was analyzed and it was found that the obtained conical dot array had a negative shape of the interference pattern of four laser beams. A second-order peak between two first-order peaks also occurred due to the liquid-solid expansion.

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