Isaac Tobin

Isaac Tobin
University College Dublin | UCD · School of Physics

BSc (Hons) 1.1 from Dublin Institute of Technology

About

7
Publications
972
Reads
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108
Citations
Citations since 2016
4 Research Items
105 Citations
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Introduction
Currently employed in UCD investigating novel glass-ceramic materials for use in gamma-ray astronomy. My background in laser/discharge plasma spectroscopy is being applied to materials characterisation and development.
Additional affiliations
January 2015 - June 2017
University College Dublin
Position
  • Fellow
Description
  • Working to develop glass-ceramic materials for gamma-ray scintillator applications in collaboration with a team in School of Mechanical & Materials Engineering UCD.
September 2009 - December 2014
Trinity College Dublin
Position
  • PhD Student
Description
  • As part of a collaboration between UCD, DCU & TCD on the development of an extreme ultraviolet (EUV) light source for lithography/metrology. I worked on laser plasma triggered current discharges (i.e. advantages of both laser and discharge plasmas)

Publications

Publications (7)
Article
This work determines the X-ray powder diffraction peak positions for trigonal GdF3 experimentally and using simulation. An oxyfluoride matrix glass-ceramic containing the inorganic compound GdF3 was synthesised by quench casting followed by controlled heat treatment. X-ray diffraction analysis was used to confirm the amorphous nature of the as-cast...
Article
Full-text available
Localisation of gamma-ray interaction points in monolithic scintillator crystals can simplify the design and improve the performance of a future Compton telescope for gamma-ray astronomy. In this paper we compare the position resolution of three monolithic scintillators: a 28×28×20 mm³ (length×breadth thickness) LaBr3:Ce crystal, a 25×25×20 mm³ CeB...
Article
Extreme ultraviolet (EUV) light generation by hybrid laser-assisted vacuum arc discharge plasmas, utilizing Sn-coated rotating-disc-electrodes, was investigated. The discharge was initiated by localized ablation of the liquid tin coating of the cathode disc by a laser pulse. The laser pulse, at 1064 nm, was generated by Nd:YAG lasers with variable...
Article
A gamma-ray detector composed of a single 28 x 28 x 20 mm(3) LaBr3:Ce crystal coupled to a custom built 4 x 4 array of silicon photomultipliers was tested over an energy range of 30 keV to 9.3 MeV. The silicon photomultipliers were initially calibrated using 20 ns light pulses generated by a light emitting diode. The photodetector responses measure...
Conference Paper
Scintillators synthesised as glass-ceramics have several potential benefits compared to the currently-used halide scintillators, including non-hygroscopicity, mechanical ruggedness, ease of producing customisable shapes, and the potential for low-cost synthesis. The use of these scintillators is considered for a gamma-ray telescope operating in the...
Article
We compare the extreme ultraviolet emission characteristics of tin and galinstan (atomic %: Ga: 78.35, In: 14.93, Sn: 6.72) between 10 nm and 18 nm in a laser-triggered discharge between liquid metal-coated electrodes. Over this wavelength range, the energy conversion efficiency for galinstan is approximately half that of tin, but the spectrum is l...
Article
This paper describes the results of an experimental and theoretical investigation of the physical origin of the visible continuum emission usually observed in the early stages of nanosecond laser ablation of solid materials. It has been suggested, but not confirmed that the continuum is due to radiative recombination and bremsstrahlung emission. Ti...

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Projects

Project (1)
Archived project
The development of novel gamma-ray scintillator materials utilising glass-ceramics for astronomy and spectroscopy applications.