Compact low-noise GeV-scale electron-positron pair spectrometer
Recent studies have successfully demonstrated a high-flux GeV-scale gamma-ray spectrometer using energy spectra of electron–positron pairs generated in a high-Z converter. In a confined space of a meter, resolving GeV-scale pair particles using a permanent magnet is challenging owing to its relative...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379724007769 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595768386519040 |
|---|---|
| author | Jaehyun Song Youhwan Noh Mohammad Mirzaie Calin Ioan Hojbota Hyeong-il Kim Seongmin Lee Junho Won Chiwan Song Woosuk Bang |
| author_facet | Jaehyun Song Youhwan Noh Mohammad Mirzaie Calin Ioan Hojbota Hyeong-il Kim Seongmin Lee Junho Won Chiwan Song Woosuk Bang |
| author_sort | Jaehyun Song |
| collection | DOAJ |
| description | Recent studies have successfully demonstrated a high-flux GeV-scale gamma-ray spectrometer using energy spectra of electron–positron pairs generated in a high-Z converter. In a confined space of a meter, resolving GeV-scale pair particles using a permanent magnet is challenging owing to its relatively weak magnetic field strength of around 1 T. In this study, we present a compact low-background GeV-scale electron–positron pair spectrometer design, utilizing permanent magnets and imaging plates, and its experimental validation. We investigated the arrangement of magnet blocks using Geant4 simulations to enhance energy resolution over a wide spectral range from MeV to GeV. An asymmetrical yoke design was implemented to maximize the bending power without obstructing particle trajectories. We utilized and evaluated the pair spectrometer system in pair-production experiments using a multi-petawatt laser, successfully detecting GeV-range electron–positron pair particles. Additional Geant4 simulations were conducted to validate the spectrometer’s performance. This research contributes to the advancement of experimental capabilities in particle physics, especially for gamma-ray spectrometers in space-constrained environments. |
| format | Article |
| id | doaj-art-7f8653984810420c91917fb5fa34b0aa |
| institution | Kabale University |
| issn | 2211-3797 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj-art-7f8653984810420c91917fb5fa34b0aa2025-01-18T05:04:33ZengElsevierResults in Physics2211-37972025-01-0168108091Compact low-noise GeV-scale electron-positron pair spectrometerJaehyun Song0Youhwan Noh1Mohammad Mirzaie2Calin Ioan Hojbota3Hyeong-il Kim4Seongmin Lee5Junho Won6Chiwan Song7Woosuk Bang8Department of Physics and Photon Science, GIST, Gwangju 61005, Korea; Institute for Rare Isotope Science, Institute for Basic Science, Daejeon 34000, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, KoreaCenter for Relativistic Laser Science, Institute for Basic Science, Gwangju 61005, Korea; Advanced Photonics Research Institute, GIST, Gwangju 61005, KoreaCenter for Relativistic Laser Science, Institute for Basic Science, Gwangju 61005, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, Korea; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon 34126, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, KoreaDepartment of Physics and Photon Science, GIST, Gwangju 61005, Korea; Corresponding author.Recent studies have successfully demonstrated a high-flux GeV-scale gamma-ray spectrometer using energy spectra of electron–positron pairs generated in a high-Z converter. In a confined space of a meter, resolving GeV-scale pair particles using a permanent magnet is challenging owing to its relatively weak magnetic field strength of around 1 T. In this study, we present a compact low-background GeV-scale electron–positron pair spectrometer design, utilizing permanent magnets and imaging plates, and its experimental validation. We investigated the arrangement of magnet blocks using Geant4 simulations to enhance energy resolution over a wide spectral range from MeV to GeV. An asymmetrical yoke design was implemented to maximize the bending power without obstructing particle trajectories. We utilized and evaluated the pair spectrometer system in pair-production experiments using a multi-petawatt laser, successfully detecting GeV-range electron–positron pair particles. Additional Geant4 simulations were conducted to validate the spectrometer’s performance. This research contributes to the advancement of experimental capabilities in particle physics, especially for gamma-ray spectrometers in space-constrained environments.http://www.sciencedirect.com/science/article/pii/S2211379724007769Electron-positron pairPair productionPair spectrometerLaser-plasmaLaser wakefield acceleration |
| spellingShingle | Jaehyun Song Youhwan Noh Mohammad Mirzaie Calin Ioan Hojbota Hyeong-il Kim Seongmin Lee Junho Won Chiwan Song Woosuk Bang Compact low-noise GeV-scale electron-positron pair spectrometer Results in Physics Electron-positron pair Pair production Pair spectrometer Laser-plasma Laser wakefield acceleration |
| title | Compact low-noise GeV-scale electron-positron pair spectrometer |
| title_full | Compact low-noise GeV-scale electron-positron pair spectrometer |
| title_fullStr | Compact low-noise GeV-scale electron-positron pair spectrometer |
| title_full_unstemmed | Compact low-noise GeV-scale electron-positron pair spectrometer |
| title_short | Compact low-noise GeV-scale electron-positron pair spectrometer |
| title_sort | compact low noise gev scale electron positron pair spectrometer |
| topic | Electron-positron pair Pair production Pair spectrometer Laser-plasma Laser wakefield acceleration |
| url | http://www.sciencedirect.com/science/article/pii/S2211379724007769 |
| work_keys_str_mv | AT jaehyunsong compactlownoisegevscaleelectronpositronpairspectrometer AT youhwannoh compactlownoisegevscaleelectronpositronpairspectrometer AT mohammadmirzaie compactlownoisegevscaleelectronpositronpairspectrometer AT calinioanhojbota compactlownoisegevscaleelectronpositronpairspectrometer AT hyeongilkim compactlownoisegevscaleelectronpositronpairspectrometer AT seongminlee compactlownoisegevscaleelectronpositronpairspectrometer AT junhowon compactlownoisegevscaleelectronpositronpairspectrometer AT chiwansong compactlownoisegevscaleelectronpositronpairspectrometer AT woosukbang compactlownoisegevscaleelectronpositronpairspectrometer |