CYSP-HS: A new version of the CYSP directional neutron spectrometer with increased sensitivity. (December 2018)

• Record Type: Journal Article
• Authors: Bedogni, R.; Gómez-Ros, J.M.; Pola, A.; Treccani, M.; Costa, M.
• Is Part Of: Applied radiation and isotopes. Volume 142(2018:Dec.)
• Page Start: 38
• Page End: 41
• Publication Date: 2018-12
• Subjects: Neutron spectrometry -- Neutron dosimetry -- CYSP -- CYPS-HS -- NESCOFI -- NEURAPID -- Single-moderator -- Directional spectrometry; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2018.09.018
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: CSYP (CYlindrical SPectrometer) is a directional neutron spectrometer based on a single moderator embedding multiple thermal neutron detectors. Similarly to Bonner Spheres, CYSP responds from thermal up to GeV neutrons and the spectrum is obtained via few-channel unfolding methods. CYSP has the shape of a polyethylene cylinder with diameter 50 cm and height 65 cm. Owing on a thick collimator and on a specifically designed shielding structure, the internal detectors only respond to neutrons coming from a known direction. Internal thermal neutron detectors are one-cm 2 6 LiF-covered silicon diodes. Un upgraded version of CYPS was developed to work in low intensity applications, such as cosmic field measurements. It is called CYSP-HS (High-Sensitivity) and is equipped with large area 6 LiF-covered silicon diodes (LATND, Large Area Thermal Neutron Detectors). Compared with the former CYSP, the sensitivity increased approximately by an order of magnitude. This paper presents CYSP-HS focusing on the new internal detectors, the response matrix and its verification in a reference field of Am-Be available at the Politecnico di Milano. Highlights: A high-sensitivity, single-modetator, directional neutron spectrometer, CYSP-HS, was developed. CYSP-HS is an upgrade of the neutron spectrometer CYSP. Large Area semiconductor-based thermal neutron detectors were used. CYSP-HS and CYSP response matrices were compared. CYSP-HS response matrix was verified in a reference Am-Be field.