Isaac TobinUniversity College Dublin | UCD · School of Physics
Isaac Tobin
BSc (Hons) 1.1 from Dublin Institute of Technology
About
7
Publications
1,238
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133
Citations
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
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
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)
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...
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...
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...
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...
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...
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...
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...
