Aerogel Cherenkov detector for characterizing the intense flash x-ray source, Cygnus, spectrum
| Autor: | A. M. McEvoy, D. D. Schwellenbach, Yongho Kim, Christopher E. Hamilton, Andrew S. Smith, Robert M. Malone, Morris I. Kaufman, Hartmut Herrmann, C. S. Young |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Physics::Instrumentation and Detectors 010308 nuclear & particles physics Cherenkov detector business.industry Astrophysics::High Energy Astrophysical Phenomena Bremsstrahlung Radiation 01 natural sciences Electromagnetic radiation Particle detector 010305 fluids & plasmas law.invention Nuclear physics Optics Transition radiation law 0103 physical sciences Measuring instrument Physics::Accelerator Physics business Instrumentation Cherenkov radiation |
| Zdroj: | Review of Scientific Instruments. 87:11E723 |
| ISSN: | 1089-7623 0034-6748 |
| Popis: | An aerogel Cherenkov detector is proposed to measure the X-ray energy spectrum from the Cygnus—intense flash X-ray source operated at the Nevada National Security Site. An array of aerogels set at a variety of thresholds between 1 and 3 MeV will be adequate to map out the bremsstrahlung X-ray production of the Cygnus, where the maximum energy of the spectrum is normally around 2.5 MeV. In addition to the Cherenkov radiation from aerogels, one possible competing light-production mechanism is optical transition radiation (OTR), which may be significant in aerogels due to the large number of transitions from SiO2 clusters to vacuum voids. To examine whether OTR is a problem, four aerogel samples were tested using a mono-energetic electron beam (varied in the range of 1–3 MeV) at NSTec Los Alamos Operations. It was demonstrated that aerogels can be used as a Cherenkov medium, where the rate of the light production is about two orders magnitude higher when the electron beam energy is above threshold. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|