Ewch i’r prif gynnwys
Simon Doyle

Yr Athro Simon Doyle

Timau a rolau for Simon Doyle

Trosolwyg

Rwy'n Athro yn yr Ysgol Ffiseg a Seryddiaeth ym Mhrifysgol Caerdydd sy'n arbenigo mewn datblygu offeryniaeth ar gyfer seryddiaeth milimetr ac is-filimetr. Mae arsylwi ar y tonfeddi hir hyn yn rhoi golwg unigryw i ni o'n Bydysawd ond mae angen systemau camera sensitif ac arbenigol iawn sy'n cael eu gweithredu ar delesgopau sydd wedi'u lleoli ar safleoedd uchder uchel (sych) neu ar arsyllfeydd balŵn a lloeren.  Mae technoleg ddatblygedig yn y maes hwn yn cynnwys ymchwil a datblygu mewn technoleg synhwyrydd uwch-ddargludol, banciau hidlo uwch-ddargludol a thrin signalau RF, cryogeneg, cydrannau a hidlwyr lled-optegol a systemau delweddu o'r diwedd i'r diwedd. Ar hyn o bryd rwy'n Brif Ymchwilydd prosiect MUSCAT a adeiladodd gamera tonnau milimetr fformat mawr ar gyfer y Telesgop Tonnau Milimetr Mawr (LMT) ym Mecsico. Mae hwn yn brosiect cyffrous sydd wedi datblygu cysylltiadau cydweithredol newydd rhwng cymunedau ymchwil y DU a Mecsico ac wedi gweld ymchwilwyr o'r ddwy wlad yn gweithio gyda'i gilydd i rannu gwybodaeth a darparu galluoedd offeryniaeth newydd i'r LMT.

Mae fy ngwaith ym maes offeryniaeth seryddiaeth hefyd wedi arwain at gymwysiadau masnachol fy ymchwil gan arwain at ffurfio cwmni deillio - Sequestim Ltd.

http://muscat.astro.cf.ac.uk/wp-content/uploads/2018/03/cropped-1054917504.jpg

Cyhoeddiad

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2008

2007

  • Doyle, S. M. et al. 2007. Lumped element kinetic inductance detectors. Presented at: 18th International Symposium on Space Terahertz Technology 2007 (ISSTT 2007) Pasadena, CA, USA 21-23 March 2007. Published in: Karpov, A. ed. 18th International Symposium on Space Terahertz Technology 2007 (ISSTT 2007). International Symposium on Space Terahertz Technology ( ISSTT ) NY: International Symposium on Space Terahertz Technology ( ISSTT ). , pp.170-177.

2006

2005

Articles

Conferences

Thesis

Websites

Ymchwil

My research focuses on the area of detector and instrument development for millimetre, sub-millimetre and Terahertz imaging for astronomy and commercial applications. Detecting light at the long wavelengths is challenging as most room temperature objects radiate at these wavelengths and that the photon energy is too low to make use of conventional semiconductor based systems such as Charged Coupled Devices (CCDs). Performing sensitive imaging at these long wavelengths therefore requires working at cryogenic temperatures typically below 1K (-272°C) and using novel detector technologies that make use of superconducting material properties to convert light into a measurable output. I lead a group of researchers and technical staff that continues to develop instrumentation and detector arrays based on Kinetic Inductance Detectors as well as new compact continuous sub-Kelvin cryogenic coolers.

Kinetic Inductance Detectors

One of the significant outputs of my research has been the invention and development of the Lumped Element Kinetic Inductance Detector (LEKID). This is a variant of the Microwave Kinetic Inductance Detector (MKID) that has properties to enable direct coupling to light (like in a CCD pixel) and convenient coupling to microstrip structures. The LEKID is a superconducting, high quality factor microwave resonator consisting of a planar capacitor-inductor circuit. The inductor has two components – a fixed geometrical inductance Lg and a kinetic inductance Lk resulting in a resonant frequency F0=1/[(Lg+Lk)C]0.5 (typically 0.5-3 GHz). The absorption of a photon with energy greater than the superconducting band gap (hν > 2Δ typically around 90GHz for aluminium based devices) splits paired electrons in the superconducting inductive section modifying F0 though an increase in Lk. This response to absorbed optical power is sensed by measuring the shift in the amplitude and phase of a fixed microwave tone propagated along a microwave feed line to which a LEKID is coupled. This is demonstrated in figure 1.

https://www.astro.cf.ac.uk/~spxsmd/Personal_Page_Figure_1.png

By their very nature, KIDs are naturally multiplexed in the frequency domain and have demonstrated multiplexing ratios of order 1000 detectors/readout channel over readout bandwidths of 2GHz [1]. Furthermore, KID devices only require a single cryogenic amplifier and a pair of coaxial lines to readout each channel leading to a dramatic reduction in the complexity of cryogenic readout electronics and overall focal plane cost compared to rival technologies such as Transition Edge Sensors (TES). KID based focal planes have also demonstrated photon noise limited performance on ground-based mm-wave instruments such as NIKA-2 [2] where the group at Cardiff collaborated on the detector and optical filtering development.

Compact and continuous sub-Kelvin cooling platforms

Our group has been working in collaboration with Chase Cryogenics to develop compact and continuous cooling platforms based upon sorption and dilution refrigerator technology. This work has been proven in the MUSCAT instrument where continuous operation at 130mK under an optical load has been achieved continuously in a self-contained system. The principle is that a pair of standard sorption coolers are run sequentially to provide pre-cooling to a miniature dilution refrigerator unit [3]. The miniature dilution unit runs in a similar way to a standard dilution refrigerator but circulation of the Helium-3 is created through a convective effect. Such a system does not require large volumes of costly Helium-3 nor does it require a bulky room temperature gas handling system. The unit is fully automated and has been proven to maintain its base temperature for months at a time. The entire system is pre-cooled with a commercially available Pulse Tube Cooler (PTC) meaning that no liquid cryogens are required, and the entire system can be controlled remotely.

https://www.astro.cf.ac.uk/~spxsmd/Personal_Page_Figure_2.png

MUSCAT – Full Instrument Development

The experience developed in cryogenics and detector design and fabrication has enabled our group to build an end-to-end cryogenic astronomical camera operating at 300GHz (1mm). The Mexico UK Sub-millimetre Camera for Astronomy (MUSCAT) was developed as part of a knowledge exchange program between the UK and Mexico resulting in a full camera being built for installation at the Large Millimeter Telescope (LMT) in Mexico in early 2021. The camera’s focal plane was designed to be simple and cost effected and can be replicated and adapted by our Mexican partners in future configurations. Using the compact and simple cryogenic sub-Kelvin coolers developed by the group means that MUSCAT can be retrofitted with new focal plane technologies and filtering at the site with minimal effort. Ths makes MUSCAT a versatile instrument platform. The Camera is now fully commissioned in the lab and has demonstrated photon noise limited performance meaning the system has reached the fundamental limits in terms of sensitivity. More details about this project can be found here.

https://www.astro.cf.ac.uk/~spxsmd/Personal_Page_Figure_3.png

Imaging systems for industry

Our group has also worked with a commercial partner Sequestim to produce passive security imaging for airport passenger and goods vehicle screening using the technology developed for astronomy. Many materials including clothing and truck tarpaulins are transparent to millimetre and sub-millimetre light meaning we can detect hidden objects beneath these materials. Importantly, the combination of simplified cryogenics and large format arrays of sensitive detectors makes this approach commercially viable. Another important benefit of this approach is that it is purely passive. Unlike rival systems, our camera does not need to irradiate the object to be screened meaning it is safe for humans and can work at ranges of up to 20 meters. The versatility of such a system means that is can screen people and vehicles on the move, drastically improving security screening times. Further information about Sequestim can be found here.

https://www.astro.cf.ac.uk/~spxsmd/Personal_Page_Figure_4.png

Addysgu

2021 - Yn bresennol: Trefnydd Modiwlau ac asesydd cynradd – PX1150 Ffiseg Arbrofol Blwyddyn 1

2020 - 2021: Dirprwy Drefnydd Modiwl ac asesydd cynradd – PX1150 Ffiseg Arbrofol Blwyddyn 1

2017 – Yn bresennol: Dirprwy Drefnydd Modiwl ac asesydd cynradd – modiwl prosiect myfyrwyr MPhys PX4310

2013 – Yn bresennol: Trefnydd Modiwl – Canfod Ymbelydredd Electromagnetig PX3144

2012 – Tiwtor israddedig 1af ac 2il flwyddyn bresennol

2013 – Yn bresennol: goruchwyliwr prosiect PX3315 BSc

2014 – Yn bresennol: goruchwyliwr prosiect PX4310 MPhys

2015 – 2017: Dirprwy Drefnydd Modiwl PX4125 – Offeryniaeth Seryddiaeth

2013 – 2017: goruchwyliwr academaidd myfyrwyr lleoliad

2012 – 2017: Dirprwy Drefnydd Modiwl – PX2133  Ffiseg Ymarferol

2012 – 2013: Dirprwy Drefnydd Modiwl – Canfod Ymbelydredd Electromagnetig PX3144

Bywgraffiad

Hanes Academaidd 2022 – Yn bresennol: Athro mewn Astroffiseg Arbrofol, Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

2017 - 2022: Darllenydd mewn Astroffiseg Arbrofol, Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

2015 – 2017: Uwch Ddarlithydd, Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

2012 – 2015: Darlithydd, Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

2008 – 2012 Cydymaith Ymchwil Ôl-ddoethurol (PDRA), Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

2004 – 2008 PhD Ffiseg, Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

Hanes Addysg

2013 – 2014: Modiwlau 1 a 2 o Dystysgrif Ôl-raddedig mewn Addysgu a Dysgu (PCULT), Prifysgol Caerdydd

2004 – 2008 – Myfyriwr PhD mewn astroffiseg arbrofol

1999 – 2003: MPhys Astroffiseg Ysgol Ffiseg a Seryddiaeth Prifysgol Caerdydd

Goruchwylio addysgu a PhD Profiad

2012 – Yn bresennol: Goruchwyliwr PhD (6 myfyriwr hyd yn hyn, tri ar hyn o bryd, tri wedi graddio)

2017 – Yn bresennol: Dirprwy Drefnydd Modiwl ac asesydd cynradd – modiwl prosiect myfyrwyr MPhys

2013 – Yn bresennol: Trefnydd Modiwl – Canfod Ymbelydredd Electromagnetig

2012 – Yn bresennol: PhD Cyd-oruchwyliwr (4 myfyriwr hyd yn hyn)

2012 – Presennol: Darlithoedd ôl-raddedig

2012 – Tiwtor israddedig 1af ac 2il flwyddyn bresennol (21 myfyriwr hyd yn hyn)

2013 – Yn bresennol: goruchwyliwr prosiect BSc (8 myfyriwr hyd yn hyn)

2014 – Yn bresennol: goruchwyliwr prosiect MPhys (4 myfyriwr hyd yn hyn)

2015 – 2017: Dirprwy Drefnydd Modiwl – Offeryniaeth Seryddiaeth

2013 – 2017: Goruchwyliwr academaidd myfyrwyr ar leoliad (4 myfyriwr)

2012 – 2017: Dirprwy Drefnydd Modiwl – Ffiseg Ymarferol

2012 – 2013: Dirprwy Drefnydd Modiwl – Canfod Ymbelydredd Electromagnetig

2008 – 2012: Cymorth gyda myfyrwyr prosiect BSc a MPhys (6 myfyriwr)

Cyllid ymchwil

STFC 2019 - Cynllun Partneriaeth Diwydiannol STFC Presennol (IPS) "Sgrinio Diogelwch Maes Awyr Cyflym Gan Ddefnyddio Technoleg Uwch-ddargludol PI

STFC 2019 – Cam A SO-UK presennol

STFC 2019 – Cyflwyno Rhaglen o dechnoleg, astroffiseg a chosmoleg yng Nghaerdydd – Rhaglen Synhwyrydd PI

EPSRC (Canolfan Meintiol, Glasgow), Synwyryddion Anwythiad Kinetig Nitride Titaniwm ar gyfer Delweddu Terahertz - 2, PI Caerdydd 2018-Present

EPSRC (Canolfan Meintiol, Glasgow), Synwyryddion Anwythiad Kinetig Nitride Titaniwm ar gyfer Delweddu Terahertz, PI Caerdydd 2017-2018

Cronfa Newton RCUK (sy'n cael ei weinyddu gan STFC: "MUSCAT- camera fformat mawr technoleg newydd ar gyfer y Telesgôp Milimedr Mawr". PI Caerdydd 2015 - Presennol

Cynllun Partneriaeth Ddiwydiannol STFC (IPS). "System ddelweddu masnachol THz gan ddefnyddio Synwyryddion Anwythiad Kinetig Elfen Lwmped ". PI 2015 - 2018

Grant cyfunol STFC: PI ar thema'r synwyryddion (thema 10) 2016 - 2019

Grant cyfunol STFC: PI ar thema'r synwyryddion (thema 11) 2015 - 2016

SPACEKIDS - EC REA FP7-Space: Uwch wyddonydd ac arweinydd pecyn gwaith ar y grant hwn. 2012 - 2015

Cyfrif Cyflymu Effaith STFC: Co-I ar y grant hwn. 2012

Rolau gweinyddol yr Ysgol Ffiseg a Seryddiaeth

Mentor PCUTL 2015- presennol

PDRA a Mentor Staff Academaidd 2015 - presennol

Cynrychiolydd grŵp defnyddwyr AIG Cleanroom 2016 - presennol

Aelod o'r Bwrdd Astudiaethau 2012 – Presennol

Aelod o'r Bwrdd Arholi 2012 – Presennol

Tiwtor Derbyn Ôl-raddedig 2014 – Presennol

Panel Cynnydd Ôl-raddedig 2016 - presennol

Panel cyfweld a dethol myfyrwyr PhD 2012 - presennol

Aelodaeth o weithgorau a phaneli allanol

Bwrdd Golygyddol NIKA 2013 – presennol

Sefydliad Ffiseg Grŵp Tymheredd Isel 2012 - 2016

Pwyllgor trefnu gwyddoniaeth, grŵp MKIDs Science Foundation Ireland. 2016 - Presennol

Cynghorydd technegol i grŵp MKIDs Science Foundation Ireland. 2016 – Presennol

Pwyllgor Cynghori Synhwyrydd STFC 2018

Rolau mewn asesu allanol

Arholwr allanol PhD, Prifysgol Grenoble Alpau, Ffrainc, 2019

Grant adolygydd cyfunol STFC 2016, 2018

Cyfnodolyn y dyfarnwr cyhoeddi ffiseg tymheredd isel 2019, 2016 a 2012

Arholwr allanol PhD, Royal Holloway, Prifysgol Llundain, 2013

Sgyrsiau a darlithoedd gwahoddedig

Sgwrs seminar, Maynooth, Mawrth 2015

Gweithdy FISICA, Maynooth, Ionawr 2015

Cynhadledd Synwyryddion Tymheredd Isel, Grenoble 2015 (Gwahoddwyd Medi 2014)

Symposiwm Rhyngwladol Technoleg Gofod Terahertz - Moscow 2014

Dyfeisiau a Chymwysiadau Uwchddargludol, Labordai Ffiseg Cenedlaethol, 2013

Ysgol Haf Synwyryddion Tymheredd Isel, Toulon, Ffrainc, Mai 2012

Gweithdy ar begynoldeb sbecimetreg sbectrol microdon – Paris 2012

Cyfarfod Seryddiaeth Cenedlaethol, Glasgow (ni fynychwyd oherwydd tarfu ar deithio)

Sgyrsiau cynadledda eraill, sgyrsiau grŵp a chadeiriau sesiwn

SPACEKIDS yn dod â chyflwyniad i'r Comisiwn Ewropeaidd, Noordwijk 2016

Gweithdy SPACEKIDs, Noordwijk, 2016

Gweithdy SPACEKIDs, Caerdydd 2014

Gweithdy FIRI, Llundain 2013

Darlith gyhoeddus, Caerdydd 2013

Cynhadledd Synhwyrydd Tymheredd Isel, Pasadena 2013

Sgwrs grŵp, Jena 2013

Ail Keck Sefydliad Astudiaethau Gofod Gweithdy datblygu TiN, Pasadena 2012

Gweithdy micro-resonator, Grenoble 2011

Gweithdy datblygu TiN Sefydliad Astudiaethau Gofod Keck Cyntaf, Pasadena 2011

Cynhadledd SPIE, San Diego 2010

Milimedr Isgoch a Thonnau Terahertz (IRMMW-THz), Rhufain 2010

Cadeirydd Sesiwn Cynhadledd Synwyryddion Tymheredd Isel, Stanford 2009

Cynhadledd SPIE, Marseille 2008

Gweithdy Resonators Superconducting, Utrecht 2007

Cynhadledd Synhwyrydd Tymheredd Isel, Paris 2007

Cynhadledd Technoleg Ryngwladol Symposiwm Gofod Terahertz, Gothenburg 2007

Gweithdy synwyryddion sŵn isel iawn, Caergrawnt 2007

Gweithdy Resonators Superconducting, Pasadena 2006

Meysydd goruchwyliaeth

Myfyrwyr cyfredol

  • Gethin Robson, myfyriwr PhD - Caerdydd (2020 - presennol) - Datblygu synwyryddion superconducting a strwythurau hidlo ar gyfer y genhedlaeth nesaf o offerynnau seryddol is-mm.

Cyn-fyfyrwyr

  • Amber Hornsby, myfyriwr PhD - Caerdydd (2016- presennol) - Datblygu Canolbwyntiau Sensitif Polareiddio Amlcromig ar gyfer arsylwadau o Gefndir Microdon Cosmig.
  • Josie Parrianen, myfyriwr PhD - Caerdydd (2014-2018) - Astudiaethau o Derfynau Canfod Ffoton Sengl mewn Synwyryddion Anwythiad Kinetig Elfen Lwmpedig.
  • Pete Barry, myfyriwr PhD - Caerdydd (2010-2014) - Datblygiad SuperSpec; Sbectromedr ar-sglodion cwbl integredig ar gyfer seryddiaeth is-goch bell.

Contact Details

Email [email protected]
Telephone +44 29208 76170
Campuses Adeiladau'r Frenhines - Adeilad y Gogledd, Ystafell N/0.44, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA

Themâu ymchwil

Arbenigeddau

  • Uwchgyfandir
  • Microdon
  • Offeryniaeth seryddol
  • Cryogeneg