Determination of the Kerr Constant of Water at 658 nm for Pulsed Intense Electric Fields

Novac, B.M.; Banakhr, Fahd; Smith, I.R.; Pécastaing, Laurent; Ruscassie, R.; Ferron, Antoine Silvestre de; Pignolet, P.

doi:10.1109/tps.2012.2188909

Cited by 9 publications

(14 citation statements)

References 26 publications

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“…The 'noise' present in the electric field results at low amplitudes is an artifact due to the inevitable large errors when analyzing low amplitude Kerr signals. Full details on the errors related to Kerr signal analysis are provided in [24]. The results of the PEF experiments presented below are expressed in terms of the peak central electric field calculated as described above.…”

Section: Main Results Of the Pef Experimentsmentioning

confidence: 99%

“…The final results of the temperature study will be presented elsewhere. However, previous results [24] indicate that for room temperature T ref =295 K, and at a wavelength of 658 nm, the value is B(T ref )=2.45•10 -14 m/V 2 . Using Eq (2), at T=313 K, the corresponding B represents 87% of the room temperature value.…”

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 87%

“…Although the measurement technique appears straightforward, an extensive research programme was necessary to clarify the accuracy of the measurement and to find the precise Kerr constant for water at room temperature [24]. The technical details of the electro-optical arrangement are presented elsewhere [24] and, because of the high homogeneity of the electric field inside the cell water, the cross section of the laser beam plays no role.…”

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 99%

“…2). The role of this is to increase the Kerr measurement precision [24] and, whenever used in the present work, the optical arrangement was made such that π/4 δ − = . For the particular arrangement used in this work, Eq.…”

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 99%

See 3 more Smart Citations

Demonstration of a Novel Pulsed Electric Field Technique Generating Neither Conduction Currents Nor Joule Effects

Novac

Banakhr

Smith

et al. 2014

IEEE Trans. Plasma Sci.

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Section: Main Results Of the Pef Experimentsmentioning

confidence: 99%

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 87%

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 99%

Section: F Electric Field Diagnostic Using the Kerr Effect In Watermentioning

confidence: 99%

See 2 more Smart Citations

Demonstration of a Novel Pulsed Electric Field Technique Generating Neither Conduction Currents Nor Joule Effects

Novac

Banakhr

Smith

et al. 2014

IEEE Trans. Plasma Sci.

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“…(1) is only valid when the input light launched by a laser is linearly polarised at an angle of ʌ/4 with respect to the direction of the externally applied electric field and the output light is analysed using a polariser orientated perpendicular to the initial direction of polarisation. For the arrangement used in the present experiments [2], Eq. (1) can be simplified to:…”

Section: Electric Field Measurementmentioning

confidence: 99%

Non-invasive pulsed electric field food processing: Proof-of-principle experiments

Novac

Banakhr

Smith

et al. 2012

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)

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Two essential requirements arise before any proposed and novel non-invasive pulsed electric field (PEF) food processing technique can be implemented in industrially meaningful systems. These are the reliable measurement of the intense fast transient electric fields generated in water close to metallic electrodes and a convincing proofof-principle demonstration of the non-invasive technique. Recently, both of these milestones have been very successfully achieved in a joint research programme in progress at Loughborough University (UK) and Université de Pau (France). The paper reports on results from preliminary experiments with a non-invasive proof-ofprinciple treatment chamber, showing the paramount importance of electro-optic measurements. In addition, very successful proof-of-principle non-invasive processing experiments are discussed, in which only extremely small displacement currents flow inside water samples. The electric field in the samples was monitored using the Kerr effect and a 6 log reduction was obtained in the Escherichia coli initially present. The possible future of the novel technology is briefly commented on.Index Terms -Pulsed electric field, food processing, electro-optic Kerr effect, electrostatic field mapping

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Strong Anisotropy in Liquid Water upon Librational Excitation Using Terahertz Laser Fields

et al. 2020

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Orienting water molecules in the homogeneous liquid is challenging due to the ultrafast dissipation of rotational excitation energy through the hydrogen-bonded network. Here we demonstrate strong transient anisotropy of liquid water through librational excitation using single-color pump-probe experiments at 12.3 THz, with the birefringence exceeding previously reported values by three to five orders of magnitude. Using a theory that replaces the third order response with a material response property amenable to molecular dynamics simulation, we show that the rotationally damped motion of water molecules in the librational band is resonantly driven at this frequency, thereby enhancing the liquid anisotropy by the external Terahertz field. By addition of salt (MgSO4), the hydration water is instead dominated by the local electric field of the ions, resulting in reduction of water molecules that can be dynamically perturbed by THz pulses.

show abstract

Determination of the Kerr Constant of Water at 658 nm for Pulsed Intense Electric Fields

Cited by 9 publications

References 26 publications

Demonstration of a Novel Pulsed Electric Field Technique Generating Neither Conduction Currents Nor Joule Effects

Demonstration of a Novel Pulsed Electric Field Technique Generating Neither Conduction Currents Nor Joule Effects

Non-invasive pulsed electric field food processing: Proof-of-principle experiments

Strong Anisotropy in Liquid Water upon Librational Excitation Using Terahertz Laser Fields

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