CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Cosmic clues from astrophysical particles
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-1153-2139
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Ultra-high-energy cosmic rays (UHECRs) are charged particles that have been accelerated to extreme energies, such that they are effectively travelling at the speed of light. Interactions of these particles with the Earth’s atmosphere lead to the development of extensive showers of particles and radiation that can be measured with existing technology. Despite decades of research, the origins of UHECRs remain mysterious. However, they are thought to be accelerated within powerful astrophysical sources that lie beyond the borders of our Galaxy. This thesis explores different ideas towards the common goal of reaching a deeper understanding of UHECR phenomenology. Part I concerns the development of a novel space-based observatory that has the potential to detect unprecedented numbers of these enigmatic particles. The feasibility of such a project is demonstrated by the results from the Mini-EUSO instrument, a small ultraviolet telescope that is currently on-board the International Space Station. In Part II, the focus is on fully exploiting the available information with advanced analysis techniques to close the gap between theory and data. UHECRs are closely connected to the production of neutrinos and gamma rays, so frameworks for the joint analysis of these complementary cosmic messengers are also developed. The results presented herein demonstrate that to progress, it is crucial to invest in the development of both detection and analysis techniques. By taking a closer look at the existing data, new clues can be revealed to reach a more comprehensive understanding and better inform the design of future experiments. 

Abstract [sv]

Ultrahög energetisk kosmisk strålning (UHECR) är laddade partiklar som har accelererats till extrema energier, så att de i praktiken färdas med ljusets hastighet. Det är möjligt att upptäcka dessa partiklar när de växelverkar med jordens atmosfär då omfattande skurar med partiklar och strålning utvecklas, vilka kan mätas med befintlig teknik. Trots decennier av forskning förblir UHECR:s ursprung dold. Men de tros vara accelererade inom kraftfulla astrofysiska källor som ligger utanför vår galax. Denna avhandling utforskar olika idéer med det gemensamma målet att nå en djupare förståelse av UHECR-fenomenologin. Del I handlar om utvecklingen av ett nytt rymdbaserat observatorium som har potential att upptäcka ett stort antal av dessa gåtfulla partiklar. Genomförandet av ett sådant projekt demonstreras av resultaten från Mini-EUSO-instrumentet som för närvarande är ombord på den Internationella rymdstationen. I Del II ligger fokus på att utnyttja tillgänglig information med avancerade analystekniker för att minska klyftan mellan teori och data, för att nå en djupare förståelse av aktuella observationer. UHECR:er är nära kopplade till produktionen av neutriner och gammastrålning. Ramar för gemensam analys av dessa komplementära kosmiska budbärare utvecklas. Resultaten som presenteras här visar att det är avgörande att investera i utvecklingen av både detekterings- och analystekniker för att gå vidare. Genom att titta närmare på befintliga data kan nya ledtrådar avslöjas i sammanhanget med så kallade multi-budbärare och ger information för att bättre utforma framtida experiment. 

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2020. , p. 180
Series
TRITA-SCI-FOU ; 2020:16
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics
Identifiers
URN: urn:nbn:se:kth:diva-273388ISBN: 978-91-7873-548-8 (print)OAI: oai:DiVA.org:kth-273388DiVA, id: diva2:1430628
Public defence
2020-06-12, FB42, AlbaNova University Centre, Roslagstullsbacken 21, Stockholm, 13:00 (English)
Opponent
Supervisors
Available from: 2020-05-19 Created: 2020-05-15 Last updated: 2020-05-20Bibliographically approved
List of papers
1. Mini-EUSO: A high resolution detector for the study of terrestrial and cosmic UV emission from the International Space Station
Open this publication in new window or tab >>Mini-EUSO: A high resolution detector for the study of terrestrial and cosmic UV emission from the International Space Station
2017 (English)In: Advances in Space Research, ISSN 0273-1177, E-ISSN 1879-1948Article in journal (Refereed) Published
Abstract [en]

The Mini-EUSO instrument is a UV telescope to be placed inside the International Space Station (ISS), looking down on the Earth from a nadir-facing window in the Russian Zvezda module. Mini-EUSO will map the earth in the UV range (300-400. nm) with a spatial resolution of 6.11. km and a temporal resolution of 2.5. μs, offering the opportunity to study a variety of atmospheric events such as transient luminous events (TLEs) and meteors, as well as searching for strange quark matter and bioluminescence. Furthermore, Mini-EUSO will be used to detect space debris to verify the possibility of using a EUSO-class telescope in combination with a high energy laser for space debris remediation. The high-resolution mapping of the UV emissions from Earth orbit allows Mini-EUSO to serve as a pathfinder for the study of Extreme Energy Cosmic Rays (EECRs) from space by the JEM-EUSO collaboration. 

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Earth observation, EECR, EUSO, Fluorescence detection, ISS, UV observation
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:kth:diva-215040 (URN)10.1016/j.asr.2017.08.030 (DOI)000449448700016 ()2-s2.0-85029208980 (Scopus ID)
Note

Export Date: 29 September 2017; Article in Press; CODEN: ASRSD; Correspondence Address: Capel, F.email: capel@kth.se. QC 20171003

Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2020-05-15Bibliographically approved
2. The integration and testing of the Mini-EUSO multi-level trigger system
Open this publication in new window or tab >>The integration and testing of the Mini-EUSO multi-level trigger system
Show others...
2017 (English)In: Advances in Space ResearchArticle in journal (Refereed) Published
Abstract [en]

The Mini-EUSO telescope is designed by the JEM-EUSO Collaboration to observe the UV emission of the Earth from the vantage point of the International Space Station (ISS) in low Earth orbit. The main goal of the mission is to map the Earth in the UV, thus increasing the technological readiness level of future EUSO experiments and to lay the groundwork for the detection of Extreme Energy Cosmic Rays (EECRs) from space (Ebisuzaki et al., 2014). Due to its high time resolution of 2.5 μs, Mini-EUSO is capable of detecting a wide range of UV phenomena in the Earth’s atmosphere. In order to maximise the scientific return of the mission, it is necessary to implement a multi-level trigger logic for data selection over different timescales. This logic is key to the success of the mission and thus must be thoroughly tested and carefully integrated into the data processing system prior to the launch. This article introduces the motivation behind the trigger design and details the integration and testing of the logic.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Front-end, Readout electronics, Trigger, DAQ, Data management, EUSOEECRs
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-217914 (URN)10.1016/j.asr.2017.10.044 (DOI)000449448700017 ()2-s2.0-85033381278 (Scopus ID)
Note

Export Date: 20 November 2017; Article in Press. QC 20171206

Available from: 2017-11-20 Created: 2017-11-20 Last updated: 2020-05-15Bibliographically approved
3. Mini-EUSO data acquisition and control software
Open this publication in new window or tab >>Mini-EUSO data acquisition and control software
Show others...
2019 (English)In: JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS, ISSN 2329-4124, Vol. 5, no 4, article id 044009Article in journal (Refereed) Published
Abstract [en]

We present the data acquisition and control software for the operation of the Mini-Extreme Universe Space Observatory (EUSO), a space-based fluorescence telescope for the observation of extensive air showers and atmospheric phenomena. This framework has been extensively tested alongside the development of Mini-EUSO and was finalized ahead of the successful launch of the instrument to the ISS on August 22, 2019. The data acquisition, housekeeping, and subsystem control is achieved using custom-designed front-end electronics based on a Xilinx Zynq XC7Z030 chip interfaced with a PCIe/104 CPU module via the integrated Zynq processing system. The instrument control interface is handled using an object-oriented C++ design, which can be run both autonomously and interactively as required. Although developed for Mini-EUSO, the modular design of both the software and hardware can easily be scaled up to larger instrument designs and adapted to different subsystem and communication requirements. As such, this framework will also be used in the upgrade of the EUSO-TA instrument and potentially for the next EUSO-SPB2 NASA Balloon flight. The software and firmware presented are open source and released with detailed and integrated documentation.

Place, publisher, year, edition, pages
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 2019
Keywords
ultraviolet telescope, cosmic rays, data acquisition, control software
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-269506 (URN)10.1117/1.JATIS.5.4.044009 (DOI)000510649500019 ()
Note

QC 20200309

Available from: 2020-03-09 Created: 2020-03-09 Last updated: 2020-05-15Bibliographically approved
4. Impact of using the ultrahigh-energy cosmic ray arrival energies to constrain source associations
Open this publication in new window or tab >>Impact of using the ultrahigh-energy cosmic ray arrival energies to constrain source associations
2019 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 484, no 2, p. 2324-2340Article in journal (Refereed) Published
Abstract [en]

We present a Bayesian hierarchical model which enables a joint fit of the ultrahigh-energy cosmic ray (UHECR) energy spectrum and arrival directions within the context of a physical model for the UHECR phenomenology. In this way, possible associations with astrophysical source populations can be assessed in a physically and statistically principled manner. The importance of including the UHECR energy data and detection effects is demonstrated through simulation studies, showing that the effective GZK horizon is significantly extended for typical reconstruction uncertainties. We also verify the ability of the model to fit and recover physical parameters from CRPROPA 3 simulations. Finally, the model is used to assess the fraction of the publicly available data set of 231 UHECRs detected by the Pierre Auger Observatory which are associated with the Fermi-LAT 2FHL catalogue, a set of starburst galaxies, and Swift-BAT hard X-ray sources. We find association fractions of 9.5(-5.9)(+2.4), 22.7(-12.4)(+6.6), and 22.8(-8.0)(+6.6) per cent for the 2FHL, starburst galaxies, and Swift-BAT catalogues respectively.

Place, publisher, year, edition, pages
Oxford University Press, 2019
Keywords
methods: data analysis, methods: statistical, cosmic rays
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-249864 (URN)10.1093/mnras/stz081 (DOI)000462302600061 ()2-s2.0-85063366285 (Scopus ID)
Note

QC 20190424

Available from: 2019-04-24 Created: 2019-04-24 Last updated: 2020-05-15Bibliographically approved
5. Bayesian constraints on the astrophysical neutrino source population from IceCube data
Open this publication in new window or tab >>Bayesian constraints on the astrophysical neutrino source population from IceCube data
(English)Manuscript (preprint) (Other academic)
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-273387 (URN)
Available from: 2020-05-15 Created: 2020-05-15 Last updated: 2020-05-15

Open Access in DiVA

fulltext(24705 kB)50 downloads
File information
File name FULLTEXT03.pdfFile size 24705 kBChecksum SHA-512
9b44636c4884b2d971fe2cf1faaf344816f1115b18c31037afc9c8e040633107cd30a89227d1a0569cd6c547bd28f72f638eb7fd0fd803fa70c6718c784901be
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Capel, Francesca
By organisation
Particle and Astroparticle Physics
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
Total: 52 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 275 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf