Dr. James E. Andrew Profile

Dr. James E. Andrew

Team leader Laser Debris at AWE plc

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 26 November 2018 Paper

Fragment plume evaluations from two examples of high-energy density laser target interactions

J. Andrew

Proceedings Volume 10805, 108051J (2018) https://doi.org/10.1117/12.2325668

KEYWORDS: Solids, Glasses, Metals, Diagnostics, Liquids, Plasma, Laser beam diagnostics, Laser energy, Inspection, Laser optics

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Proceedings Article | 13 November 2017 Paper

Contamination, debris, and shrapnel generation arising from large area laser target interactions

J. Andrew, R. H. Burrell, C. W. Jones, A. E. Leatherland, A. D. Sibley

Proceedings Volume 10447, 1044703 (2017) https://doi.org/10.1117/12.2279888

KEYWORDS: Glasses, Solids, Photography, Contamination, Polymers, Particles, Liquids, Plasma, Metals, Pulsed laser operation

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Proceedings Article | 23 November 2015 Paper

Dedicated contamination experiments in the Orion laser target chamber

J. Andrew, J.-M. Chevalier, D. Egan, A. Geille, J.-P. Jadaud, J.-H. Quessada, D. Raffestin, M. Rubery, P. Treadwell, L. Videau

Proceedings Volume 9632, 96320E (2015) https://doi.org/10.1117/12.2194446

KEYWORDS: Contamination, Coating, Solids, Apertures, Particles, Aluminum, Copper, Gold, High power lasers, Liquids, Diagnostics, Plasmas

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Proceedings Article | 31 October 2014 Paper

The effects of plasma physics target shrapnel and debris plumes arising from early operations of the Orion laser

J. Andrew, D. Egan, S. Miller, A. Pearce, R. Penman, D. Scott

Proceedings Volume 9237, 923705 (2014) https://doi.org/10.1117/12.2068125

KEYWORDS: Diagnostics, Plasma, Solids, Plasma physics, Surface plasmons, Metals, Liquids, Coating, Copper, Silica

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Proceedings Article | 14 November 2013 Paper

A survey of laser plasma target emissions and contamination effects

James Andrew

Proceedings Volume 8885, 88850Q (2013) https://doi.org/10.1117/12.2027327

KEYWORDS: Metals, Glasses, Surface plasmons, Plasma, Plasma physics, Polymers, Silica, Contamination, Photomicroscopy, Solids

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Proceedings Article | 4 December 2012 Paper

Measurement of debris and shrapnel plumes from cylindrical metal targets used in high-power laser systems

J. Andrew, K. Wallace

Proceedings Volume 8530, 853023 (2012) https://doi.org/10.1117/12.977221

KEYWORDS: Metals, Gold, Pulsed laser operation, Plasma, Photomicroscopy, Mirrors, High power lasers, Laser systems engineering, Laser energy, Liquids

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Proceedings Article | 7 December 2010 Paper

Characterisation of contaminant plumes arising from laser-solid target interactions

James Andrew, Katherine Wallace

Proceedings Volume 7842, 78420R (2010) https://doi.org/10.1117/12.867393

KEYWORDS: Metals, Glasses, Solids, Silica, Mirrors, Polymers, Pulsed laser operation, Photomicroscopy, Plasma, Liquids

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Proceedings Article | 31 December 2009 Paper

The effects on glass surfaces of shrapnel and debris emissions from Petawatt laser driven solid targets

James Andrew, Katherine Wallace

Proceedings Volume 7504, 75040U (2009) https://doi.org/10.1117/12.836108

KEYWORDS: Glasses, Solids, Gold, Tungsten, Pulsed laser operation, Metals, Foam, Aluminum, Inspection, Liquids

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Proceedings Article | 30 December 2008 Paper

Characterization of plasma mirrors on the HELEN laser infrared CPA beam

James Andrew, Andrew Comley

Proceedings Volume 7132, 71321S (2008) https://doi.org/10.1117/12.804394

KEYWORDS: Mirrors, Plasma, Reflectivity, Gold, Sensors, Laser energy, Silica, Optical filters, Attenuators, Pulsed laser operation

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The performance of plasma mirrors has been characterised on the HELEN laser infra-red, chirped pulse amplification [CPA] beam line. This laser produced pulse energies up to 100J with pulse lengths of ~500fs. Plasma mirrors are initially low reflectance surfaces that transmit low intensity light but produce a reflecting plasma surface when exposed to high irradiance beams. Typically they are formed by transparent substrates at the laser wavelength and have been used either uncoated or with anti-reflection coatings. The coatings evaluated in these experiments were either multi-layer dielectrics or single layer sol-gel silica. Some of the fused silica substrates were coated on both faces, others were coated on the incident face only and a small number were used uncoated. The reflectance of the plasma mirrors was measured as a function of incident energy. A vacuum compatible pyro-electric sensor in conjunction with either a diffuser or neutral density filter was used to measure incident and reflected laser energy. Both the diffuser and filter could suffer laser damage at the highest incident energies available. The morphology of the damage of the different components and coating combinations was studied as a function of incident beam energy. The mirrors were being investigated to prevent pre-pulse effects in plasma physics experiments and increase the intensity contrast ratio of the laser beam incident onto solid targets. Their proximity to the laser target also allowed them to block debris and shrapnel arising from the laser matter interaction in some directions. These material emissions spread uncontrollably in the evacuated target chamber and may cause contamination of laser optics and filters or radiation diagnostic instrumentation. The plasma mirror components were operated at 45 degrees angle of incidence and an average input beam diameter of 5.5 millimetres at the mirrors with incident beam irradiances in the range 50 TW/cm² to 540 TW/cm². The reflected beams were focussed on to 10 micron thick, 10mm diameter metal foils and 3mm diameter polymer/metal targets with a thickness of 2 to 18 microns. The subsequent debris and shrapnel effects were studied using post shot microscopy and photography.

Proceedings Article | 20 December 2007 Paper

Operational experience of contamination and damage of the larger aperture optics in the HELEN laser facility vacuum system at 1053 and 527 nanometres

James Andrew, Mark Girling, Nicholas Honiatt, David Scott, Paul Wallace

Proceedings Volume 6720, 67200P (2007) https://doi.org/10.1117/12.746743

KEYWORDS: Mirrors, Contamination, Dielectrics, Coating, Photomicroscopy, Laser induced damage, Off axis mirrors, Metals, Reflectivity, Silver

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Proceedings Article | 15 January 2007 Paper

Investigations of sacrificial and plasma mirrors on the HELEN laser CPA beam

James Andrew, Andrew Comley

Proceedings Volume 6403, 64030P (2007) https://doi.org/10.1117/12.695559

KEYWORDS: Mirrors, Plasma, Dielectrics, Reflectivity, Gold, Silver, Silica, Pulsed laser operation, Laser energy, Metals

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Proceedings Article | 7 February 2006 Paper

Characterisation of short pulse laser target debris at the HELEN laser facility

J. Griffiths, J. Andrew

Proceedings Volume 5991, 59910L (2006) https://doi.org/10.1117/12.638035

KEYWORDS: Aluminum, Pulsed laser operation, Contamination, Tantalum, X-rays, Mirrors, Laser energy, Image analysis, Coded apertures, Glasses

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Proceedings Article | 7 February 2006 Paper

Short pulse development and debris mitigation studies for the HELEN laser

James Andrew

Proceedings Volume 5991, 59911K (2006) https://doi.org/10.1117/12.638028

KEYWORDS: Mirrors, Aluminum, Pulsed laser operation, Laser development, Plasma physics, Tantalum, Contamination, Optical amplifiers, Laser energy, Silica

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Proceedings Article | 21 February 2005 Paper

Transmission and laser damage studies of fused silica and PMMA debris shields with picosecond light pulses

James Andrew, Bedrich Rus, Jonathan Griffiths, Rob Heathcote, David Neeley

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.584476

KEYWORDS: Silica, Pellicles, Laser induced damage, Polymethylmethacrylate, Beam splitters, Plasma physics, Near field, Pulsed laser operation, Coating, Mirrors

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Proceedings Article | 30 May 2003 Paper

Influence of 527-nm laser light on debris- and shrapnel-contaminated optical surfaces

James Andrew, Karen Mann, Michael Tobin, Joe Watson

Proceedings Volume 4932, (2003) https://doi.org/10.1117/12.472056

KEYWORDS: Silica, Solids, Laser induced damage, Laser damage threshold, Plasmas, Coating, Metals, Diagnostics, Liquids, Gold

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Proceedings Article | 30 May 2003 Paper

Investigation of high-power laser beam-, plasma-, debris-, and shrapnel-induced damage of optical coatings on the HELEN laser facility

Joe Watson, James Andrew, Nicholas Bazin

Proceedings Volume 4932, (2003) https://doi.org/10.1117/12.472057

KEYWORDS: Plasma, Laser induced damage, Optical coatings, Optical components, Lenses, High power lasers, Sol-gels, Contamination, Laser systems engineering, Mirrors

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Proceedings Article | 9 April 2002 Paper

Aperture scaling of 351-nm high-reflectivity sol-gel-based mirror coatings

James Andrew, Nicholas Bazin, Hazel McInnes, A. Morris, K. Porter

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461693

KEYWORDS: Optical coatings, Mirrors, Reflectivity, Multilayers, Silica, Thin film coatings, Laser induced damage, Zirconium dioxide, Sol-gels, Polarization

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Proceedings Article | 12 April 2001 Paper

Temperature effects on the LIDT of single- and multilayer sol-gel-derived thin film coatings

Nicholas Bazin, James Andrew, Hazel McInnes, A. Morris

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425014

KEYWORDS: Silica, Coating, Zirconium dioxide, Refractive index, Thin films, Multilayers, Laser induced damage, Temperature metrology, Ions, Reflectivity

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Proceedings Article | 12 April 2001 Paper

Aging studies of sol-gel-derived thin film single-layer and multilayer dielectric mirrors

Hazel McInnes, Nicholas Bazin, James Andrew, A. Morris

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425015

KEYWORDS: Coating, Silica, Multilayers, Thin films, Laser induced damage, Sol-gels, Antireflective coatings, Reflectivity, Laser damage threshold, Refractive index

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Proceedings Article | 3 March 2000 Paper

Alternative coating materials and treatments for the manufacture of ultraviolet sol-gel mirrors

Hazel McInnes, James Andrew, Nicholas Bazin, A. Morris

Proceedings Volume 3902, (2000) https://doi.org/10.1117/12.379322

KEYWORDS: Coating, Silica, Mirrors, Zirconium dioxide, Reflectivity, Sol-gels, Sensors, Ultraviolet radiation, Multilayers, Laser damage threshold

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Proceedings Article | 23 July 1999 Paper

Formation of Teflon AF polymer thin films as optical coatings in the high-peak-power laser field

Nicholas Bazin, James Andrew, Hazel McInnes

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354247

KEYWORDS: Coating, Silica, Polymers, Polymer thin films, Composites, Optical coatings, Multilayers, Absorption, Antireflective coatings, Chemical vapor deposition

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Proceedings Article | 23 July 1999 Paper

Depth profiling of sol-gel multilayers on fused silica using dynamic SIMS and SNMS

Nicholas Bazin, James Andrew, Hazel McInnes, K. Porter, A. Morris

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354238

KEYWORDS: Profiling, Multilayers, Silica, Hafnium, Thin film coatings, Sol-gels, Ions, Spectroscopy, Silicon, Mass spectrometry

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Proceedings Article | 7 April 1999 Paper

Effects of layer thickness and number of interfaces on the damage threshold of ultraviolet sol-gel mirrors

Hazel McInnes, James Andrew, Nicholas Bazin, A. Morris, K. Porter

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344378

KEYWORDS: Mirrors, Zirconium dioxide, Reflectivity, Silica, Sol-gels, Multilayers, Laser damage threshold, Interfaces, Laser induced damage, Interferometers

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Proceedings Article | 20 April 1998 Paper

Ultraviolet laser damage and optical properties of high-refractive-index single layers, multiple layers, and high/low index multilayer stacks

Hazel McInnes, James Andrew, Nicholas Bazin, A. Morris, K. Porter

Proceedings Volume 3244, (1998) https://doi.org/10.1117/12.306968

KEYWORDS: Multilayers, Laser induced damage, Ultraviolet radiation, Sol-gels, Silica, Optical properties, Laser damage threshold, Zirconium dioxide, Refractive index, Absorption

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Proceedings Article | 8 December 1997 Paper

Progress toward the design of 3w mirrors: multilayer alternating stacks

Paul Sermon, Mariana Vong, Rita Badheka, David Grosso, James Andrew

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294331

KEYWORDS: Mirrors, Sol-gels, Silica, Optical coatings, Laser induced damage, Particles, Absorption, Magnesium fluoride, Bismuth, Ultraviolet radiation

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Proceedings Article | 13 May 1997 Paper

Laser damage studies of 351-nm HR silica-zirconia sol-gel coatings

D. Spriggs, James Andrew, Nicholas Bazin

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274271

KEYWORDS: Laser induced damage, Laser damage threshold, Refractive index, Zirconium dioxide, Absorption, Reflectivity, Silica, Multilayers, Thin film coatings, Interfaces

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Proceedings Article | 8 December 1995 Paper

Characterization and application of a broad bandwidth oscillator for the HELEN laser facility

James Andrew, R. Stevenson, Thomas Bett

Proceedings Volume 2633, (1995) https://doi.org/10.1117/12.228254

KEYWORDS: Optical parametric oscillators, Oscillators, Crystals, Modulation, Glasses, Laser crystals, Continuous wave operation, Spatial frequencies, Diagnostics, Neodymium lasers

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Showing 5 of 27 publications

Conference Committee Involvement (14)

Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference

24 September 2018 | Boulder, Colorado, United States

Laser-Induced Damage in Optical Materials 2017

24 September 2017 | Boulder, Colorado, United States

Laser-Induced Damage in Optical Materials 2016

25 September 2016 | Boulder, Colorado, United States

Laser-Induced Damage in Optical Materials: 2015

28 September 2015 | Boulder, Colorado, United States

Laser-Induced Damage in Optical Materials: 2014

15 September 2014 | Boulder, Colorado, United States

Laser Damage Symposium: XLV Annual Symposium on Optical Materials for High-Power Lasers

22 September 2013 | Boulder, Colorado, United States

Laser Damage Symposium XLIV: Annual Symposium on Optical Materials for High Power Lasers

23 September 2012 | Boulder, Colorado, United States

Laser Damage Symposium XLIII: Annual Symposium on Optical Materials for High Power Lasers

18 September 2011 | Boulder, Colorado, United States

Laser Damage Symposium XLII: Annual Symposium on Optical Materials for High Power Lasers

26 September 2010 | Boulder, Colorado, United States

Boulder Damage Symposium XXXIX: Annual Symposium on Optical Materials for High Power Lasers

24 September 2007 | Boulder, Colorado, United States

Boulder Damage Symposium XXXVIII: Annual Symposium on Optical Materials for High Power Lasers

26 September 2006 | Boulder, Colorado, United States

Boulder Damage Symposium XXXVII: Annual Symposium on Optical Materials for High Power Lasers

19 September 2005 | Boulder, CO, United States

Boulder Damage Symposium XXXVI

20 September 2004 | Boulder, Colorado, United States

XXXIV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium

22 September 2003 | Boulder, Colorado, United States

Showing 5 of 14 Conference Committees

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