pLASAR: Portable Laser Ablation for Archaeological Research

The availability of advanced trace element analysis techniques has revolutionized the research possibilities for archaeologists and historians studying cultural heritage objects. These methods allow for the precise measurement of elemental composition at the part-per-million level. To achieve the high-resolution results we need, we require small samples from artefacts. While drilling is possible for some materials, visibly destructive methods are generally prohibited for particularly valuable objects. Instead, a high-powered laser can remove an almost imperceptibly small amount of material, which is then analysed using a mass spectrometer.

There are logistical challenges when using traditional static laser ablation on objects held in public and private collections. By collaborating with experts across the heritage, archaeology, and science sectors, we aim to design and deliver a portable sampling device to overcome these barriers.

Our initial projects will use the pLASAR to take microsamples from gold objects. The ablated material will be collected and then analysed using our chosen spectrometric technique, facilitating investigations into complex historical and archaeological research questions.

Funding and Material Support

John Fell Fund, Making a pLASCH: Portable Laser Ablation Sampler for Cultural Heritage

Dept. of Engineering, University of Oxford

Ashmolean Museum, University of Oxford

Partners and Collaborators

Dr Sian L Tiley-Nel, Head of University of Pretoria Museums