Characterization of the NNVT capillary plate collimators
Journal
Date Issued
2018
Author(s)
•
Ge, J.
•
•
•
Hanqi, M.
•
Zhao, X.
•
Wei, X.
•
Abstract
In this paper, we report the results of the characterization campaign of two prototypes of Micro-Channel Plates (MCPs), designed as the X-ray collimators for the Large Area Detector on board the eXTP mission. The devices were developed ad-hoc by North Night Vision Technology Co., Ltd. (Nanjing, China). Measurements involved the study of the angular response (rocking curve) of each device to X-rays of different energies. The study evidenced how the angular response of a collimator changes with the energy of the incoming photons, with the onset of side lobes at high energy, which enlarge the effective field of view of the device, causing a potential contamination of the on-axis signal. Nevertheless, the magnitude of this effect is proven to be acceptable in most situations of astrophysical interest. On the lower hand of the energy spectrum, photons may also modify the angular response due to grazing reflection on the inner walls of the collimator, a phenomenon strongly dependent on the degree of roughness of the surfaces involved. The whole campaign took place at the INAF/IAPS laboratories in Rome.
Volume
13
Issue
9
Start page
P09020
Issn Identifier
1748-0221
Ads BibCode
2018JInst..13P9020C
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
Ceraudo_2018_postprint.pdf
Description
postprint
Size
9.46 MB
Format
Adobe PDF
Checksum (MD5)
87203a0d52e1af61a14a16850dde6ce5
Loading...
Name
Ceraudo_2018.pdf
Description
[Administrators only]
Size
9.98 MB
Format
Adobe PDF
Checksum (MD5)
8691949112d5200db9fdc974e54c9c8d