IBIC2016 - List of Authors (Papaevangelou, T.)

Paper	Title	Page
TUAL02	A New Beam Loss Monitor Concept Based on Fast Neutron Detection and Very Low Photon Sensitivity	277
	J. Marroncle, A. Delbart, D. Desforge, C.L.H. Lahonde-Hamdoun, Ph. Legou, T. Papaevangelou, L. Segui, G. Tsiledakis CEA/IRFU, Gif-sur-Yvette, France
	Superconductive accelerators may emit X-rays and Gammas mainly due to high electric fields applied on the superconductive cavity surfaces. Indeed, electron emissions will generate photons when electrons impinge on some material. Their energies depend on electron energies, which can be strongly increased by the cavity radio frequency power when it is phase-correlated with the electrons. Such photons present a real problem for Beam Loss Monitor (BLM) systems since no discrimination can be made between cavity contributions and beam loss contributions. Therefore, a new BLM is proposed which is based on gaseous Micromegas detectors, highly sensitive to fast neutrons, not to thermal ones and mostly insensitive to X-rays and Gammas. This detector uses Polyethylene for neutron moderation and the detection is achieved using a 10B or 10B4C converter film with a Micromegas gaseous amplification. Simulations show that detection efficiencies > 8 % are achievable for neutrons with energies between 1 eV and 10 MeV.
	Slides TUAL02 [1.248 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUAL02
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Paper

Title

Page

A New Beam Loss Monitor Concept Based on Fast Neutron Detection and Very Low Photon Sensitivity

277

J. Marroncle, A. Delbart, D. Desforge, C.L.H. Lahonde-Hamdoun, Ph. Legou, T. Papaevangelou, L. Segui, G. Tsiledakis
CEA/IRFU, Gif-sur-Yvette, France

Superconductive accelerators may emit X-rays and Gammas mainly due to high electric fields applied on the superconductive cavity surfaces. Indeed, electron emissions will generate photons when electrons impinge on some material. Their energies depend on electron energies, which can be strongly increased by the cavity radio frequency power when it is phase-correlated with the electrons. Such photons present a real problem for Beam Loss Monitor (BLM) systems since no discrimination can be made between cavity contributions and beam loss contributions. Therefore, a new BLM is proposed which is based on gaseous Micromegas detectors, highly sensitive to fast neutrons, not to thermal ones and mostly insensitive to X-rays and Gammas. This detector uses Polyethylene for neutron moderation and the detection is achieved using a 10B or 10B4C converter film with a Micromegas gaseous amplification. Simulations show that detection efficiencies > 8 % are achievable for neutrons with energies between 1 eV and 10 MeV.

Slides TUAL02 [1.248 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUAL02

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)