UK Participation in the CTA pre-production phase

Lead Research Organisation: University of Liverpool
Department Name: Physics

Abstract

The Universe is full of particles with energies so high that they are travelling at very close to the speed of light. They affect the Universe in many ways, influencing the life-cycles of stars and the evolution of galaxies. These particles are hard to trace, but can reveal their presence by producing gamma rays. Like their lower-energy cousins, X-rays, gamma rays do not penetrate the Earth's atmosphere and usually satellite-based telescopes are used to detect them. However, at very high energies (VHE) there are so few gamma rays that detecting them using spacecraft becomes impossible. Luckily, it is possible to observe them from the ground via the flashes of blue light, Cherenkov radiation, produced when they interact in the atmosphere. The glow from Cherenkov radiation in the atmosphere is 10,000 times fainter than starlight, so large mirrors are required to collect it, and because the flashes last only a few billionths of a second, ultra-fast cameras are needed to record them.
We know from current ground-based gamma-ray telescopes such as HESS that there is a wealth of phenomena to be studied. VHE gamma ray telescopes have detected the remains of supernova explosions, binary star systems, highly energetic jets produced by black holes in distant galaxies, star formation regions, and many other objects. These observations can help us to understand not only what is going on inside these objects, but also answer fundamental physics questions relating to the nature of Dark Matter and of space-time itself. However, we have reached the limit of what can be done with current instruments, and so about 1000 scientists from 29 countries around the world have come together to build a new instrument - the Cherenkov Telescope Array (CTA).
CTA will offer a dramatic increase in sensitivity over current instruments and extend the energy range of the gamma rays observed to both lower and higher values. It is predicted that the catalogue of known VHE emitting objects will expand from the 130 known now to over 1000, and we can expect many new discoveries in key areas of astrophysics and fundamental physics. To achieve the energy coverage of CTA, telescopes of three different sizes are needed: Small (~4 m diameter), Medium (12 m) and Large (23 m) Sized Telescopes (SSTs, MSTs and LSTs, respectively). CTA will have arrays in the northern and southern hemispheres. The northern array will consist of 4 LSTs and 25 MSTs. The southern array will add to its 4 LSTs and 25 MSTs an extensive array of 70 SSTs, to investigate the highest energy phenomena, visible mainly in the southern sky. We expect construction of the first telescopes on the CTA southern site to start in 2017.
There are currently 12 UK universities and Laboratories involved in CTA. The UK groups are concentrating their efforts on the construction of the SSTs. We have produced an innovative dual-mirror SST design, the Gamma-ray Cherenkov Telescope (GCT), which is being prototyped in sight of the Eiffel Tower in Paris, and are building two prototype cameras, with different sensors, we will test on this device. Here we ask for finding to complete tests of these cameras, use the results to design the final camera for the GCT and to build, with international partners, three of these for installation on GCTs on the CTA southern site. We also want to work with UK industry to provide mirrors for the telescope that are better and cheaper than current designs, as well as improving aspects of the GCT structure. Finally, we want to develop data analysis techniques for CTA, to ensure that UK scientists are ready to analyse the data from CTA as soon as the first telescopes start operation.

Planned Impact

CTA will have an impact on a wide range of scientific questions, from the nature of gravity to how supernovae accelerate particles and how active galaxies work. In doing so, it will use new and innovative methodologies, combining techniques from both astronomy and particle physics. In the process, many highly-skilled researchers will be trained.
UK industry stands to gain both from knowledge transfer and by way of contracts for producing electronics, camera housings, mirrors and structural elements. Much of this work will be undertaken in areas of economic deprivation (e.g. North East England, North Wales) thereby contributing to regeneration and economic development. Initial development work will take place over the next 2 years, with contracts being placed in the following 2-3 years.
The atmosphere is an important element of our detectors, and our Monte Carlo simulations already use data from the British Atmospheric Data Centre. Wherever the telescopes are sited, it is likely to be in an area short of detailed weather data for input to climate models. CTA's weather data are therefore likely to be useful to atmospheric modellers.
The public awareness and understanding of science will be enhanced by CTA. Our scientific research covers topics of considerable interest to the public, including black holes, supernova explosions and Dark Matter. We have already had considerable engagement with the public through events such as Stargazing Live and the Royal Society Summer Science Exhibition, as well as giving many talks to local interest groups (Women's Institutes, astronomical societies etc.) and schools. These activities will be continued and enhanced during the next few years as CTA matures as an observatory.
Early stage researchers will gain a wide range of skills from working on CTA, in areas such as programming, electronics, modelling of complex systems, image analysis etc. In addition, they will gain the "soft skills" which come from working with people from a wide range of cultural backgrounds in the international CTA Consortium. These skills will fit them for non-academic professions. For example, recent Ph.D. graduates who have worked in CTA have already gone on to careers in teaching and software engineering and we expect many more skilled people to move into non-academic careers over the 30 year lifetime of CTA.

Publications

10 25 50

publication icon
De Franco A. (2015) The first GCT camera for the cherenkov telescope array in Proceedings of Science

publication icon
Lapington J (2017) The GCT camera for the Cherenkov Telescope Array in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

publication icon
Dournaux J (2017) Operating performance of the gamma-ray Cherenkov telescope: An end-to-end Schwarzschild-Couder telescope prototype for the Cherenkov Telescope Array in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

 
Description Cherenkov Telescope Array (CTA) 
Organisation Durham University
Department Department of Physics
Country United Kingdom 
Sector Academic/University 
PI Contribution Proposal of Dual Mirror design for Small Size Telescopes (SSTs) for CTA. First mechanical and optical designs of Dual Mirror SSTs. Leadership of SST project within CTA. Contributions to physics studies for CTA. Leadership for five years and then continuing contributions to overall array simulation and design. Leadership of outreach for CTA. Collaboration Board and Project Committee membership.
Collaborator Contribution Remainder of project with nearly 1500 physicists from 224 institutes in 33 coutries (as of March 2016), including: Design of Large, Medium and other Small Size Telescopes (LSTs, MSTs and SSTs, respectively). Studies of physics that CTA will carry out. Data processing for CTA. Site search and negotions, design of array infrastructure. Develoment of legal framework for CTA Observatory.
Impact Design of telescope sstructure, camera, and mirrors. Astrophsyics outreach in the UK and internationally. PhD students.
 
Description Cherenkov Telescope Array (CTA) 
Organisation Observatory of Paris
Country France 
Sector Academic/University 
PI Contribution Proposal of Dual Mirror design for Small Size Telescopes (SSTs) for CTA. First mechanical and optical designs of Dual Mirror SSTs. Leadership of SST project within CTA. Contributions to physics studies for CTA. Leadership for five years and then continuing contributions to overall array simulation and design. Leadership of outreach for CTA. Collaboration Board and Project Committee membership.
Collaborator Contribution Remainder of project with nearly 1500 physicists from 224 institutes in 33 coutries (as of March 2016), including: Design of Large, Medium and other Small Size Telescopes (LSTs, MSTs and SSTs, respectively). Studies of physics that CTA will carry out. Data processing for CTA. Site search and negotions, design of array infrastructure. Develoment of legal framework for CTA Observatory.
Impact Design of telescope sstructure, camera, and mirrors. Astrophsyics outreach in the UK and internationally. PhD students.
 
Description Cherenkov Telescope Array (CTA) 
Organisation University of Leicester
Department Department of Physics & Astronomy
Country United Kingdom 
Sector Academic/University 
PI Contribution Proposal of Dual Mirror design for Small Size Telescopes (SSTs) for CTA. First mechanical and optical designs of Dual Mirror SSTs. Leadership of SST project within CTA. Contributions to physics studies for CTA. Leadership for five years and then continuing contributions to overall array simulation and design. Leadership of outreach for CTA. Collaboration Board and Project Committee membership.
Collaborator Contribution Remainder of project with nearly 1500 physicists from 224 institutes in 33 coutries (as of March 2016), including: Design of Large, Medium and other Small Size Telescopes (LSTs, MSTs and SSTs, respectively). Studies of physics that CTA will carry out. Data processing for CTA. Site search and negotions, design of array infrastructure. Develoment of legal framework for CTA Observatory.
Impact Design of telescope sstructure, camera, and mirrors. Astrophsyics outreach in the UK and internationally. PhD students.
 
Description Cherenkov Telescope Array (CTA) 
Organisation University of Oxford
Department Department of Physics
Country United Kingdom 
Sector Academic/University 
PI Contribution Proposal of Dual Mirror design for Small Size Telescopes (SSTs) for CTA. First mechanical and optical designs of Dual Mirror SSTs. Leadership of SST project within CTA. Contributions to physics studies for CTA. Leadership for five years and then continuing contributions to overall array simulation and design. Leadership of outreach for CTA. Collaboration Board and Project Committee membership.
Collaborator Contribution Remainder of project with nearly 1500 physicists from 224 institutes in 33 coutries (as of March 2016), including: Design of Large, Medium and other Small Size Telescopes (LSTs, MSTs and SSTs, respectively). Studies of physics that CTA will carry out. Data processing for CTA. Site search and negotions, design of array infrastructure. Develoment of legal framework for CTA Observatory.
Impact Design of telescope sstructure, camera, and mirrors. Astrophsyics outreach in the UK and internationally. PhD students.
 
Description Compact High Energy Camera 
Organisation Friedrich-Alexander University Erlangen-Nuremberg
Country Germany 
Sector Academic/University 
PI Contribution Lead design and construction of camera for GCT telescope.
Collaborator Contribution Electronics testing. Software development.
Impact Design of camera. Prototype camera.
Start Year 2015
 
Description Compact High Energy Camera 
Organisation Max Planck Society
Department Max Planck Institute for Nuclear Physics
Country Germany 
Sector Public 
PI Contribution Lead design and construction of camera for GCT telescope.
Collaborator Contribution Electronics testing. Software development.
Impact Design of camera. Prototype camera.
Start Year 2015
 
Description Compact High Energy Camera 
Organisation Nagoya University
Country Japan 
Sector Academic/University 
PI Contribution Lead design and construction of camera for GCT telescope.
Collaborator Contribution Electronics testing. Software development.
Impact Design of camera. Prototype camera.
Start Year 2015
 
Description Compact High Energy Camera 
Organisation University of Adelaide
Country Australia 
Sector Academic/University 
PI Contribution Lead design and construction of camera for GCT telescope.
Collaborator Contribution Electronics testing. Software development.
Impact Design of camera. Prototype camera.
Start Year 2015
 
Description Compact High Energy Camera 
Organisation University of Amsterdam
Country Netherlands 
Sector Academic/University 
PI Contribution Lead design and construction of camera for GCT telescope.
Collaborator Contribution Electronics testing. Software development.
Impact Design of camera. Prototype camera.
Start Year 2015
 
Description Gamma-ray Cherenkov Telescope 
Organisation Aix-Marseille University
Country France 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation Durham University
Department Department of Physics
Country United Kingdom 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation Friedrich-Alexander University Erlangen-Nuremberg
Country Germany 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation Max Planck Society
Department Max Planck Institute for Nuclear Physics
Country Germany 
Sector Public 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation Nagoya University
Country Japan 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation National Center for Scientific Research (Centre National de la Recherche Scientifique CNRS)
Department IN2P3 CNRS
Country France 
Sector Public 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation Observatory of Paris
Country France 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation University of Adelaide
Country Australia 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation University of Amsterdam
Country Netherlands 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation University of Leicester
Department Department of Physics & Astronomy
Country United Kingdom 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Gamma-ray Cherenkov Telescope 
Organisation University of Oxford
Department Department of Physics
Country United Kingdom 
Sector Academic/University 
PI Contribution Design of the first mechanical structure of the GCT. Optical design of the GCT. Design and construction of multi-anode based compact high energy camera (CHEC) for the GCT, CHEC-M. Lab testing of CHEC-M. Installation of CHAC-M on the prototype telescope. Detection of air showers with the GCT and its camera. Testing of silicon photomultipliers (SiPMs) for the SiPM based GCT camera, CHEC-S. Design and test of the CHEC-S frant-end electronics. Contributions to simulation of the GCT and studies of physics using the GCT.
Collaborator Contribution Design of the prototype telescope structure. Construction of telescope on the Meudon site of the Paris Observatory. Construction of the GCT mirrors. Monte Carlo simulations for the GCT. Back end electronics for CHEC.
Impact Prototype telescope and camera for CTA. Publications. Outreach in Ile de France area.
Start Year 2014
 
Description Mirrors for CTA 
Organisation Glyndwr University
Country United Kingdom 
Sector Academic/University 
PI Contribution Specification of mirrors
Collaborator Contribution Mirror construction process, test mirrors.
Impact Test mirrors for study of production process
Start Year 2015
 
Description GCT Inauguration 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Policymakers/politicians
Results and Impact Inauguration of the GCT telescope and camera. Attended by funding agencies from UK, France, Germany and local politicians (Ile de Fance).
Year(s) Of Engagement Activity 2015
URL http://cta.obspm.fr/projet-gct/inauguration/
 
Description Talk to Federation of Astronomical Societies AGM 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Public/other audiences
Results and Impact Talk to Federation of Astronomical Societies AGM
Year(s) Of Engagement Activity 2017
URL http://fedastro.org.uk/fas/convention/
 
Description Talk to Walsall Astronomical Society 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact Talk to Walsall Astronimical Society.
Year(s) Of Engagement Activity 2016
URL http://walsallastro.co.uk/