In:
Journal of Instrumentation, IOP Publishing, Vol. 17, No. 09 ( 2022-09-01), p. P09004-
Abstract:
Twin Frisch-grid ionization chambers (TFGICs) have been
widely used in the measurement of total kinetic energy (TKE), angular distribution, mass, and charge of the correlated fission
fragments. To study these correlated fission parameters, we have developed a TFGIC with a digital acquisition system for use at both
the Chinese Mianyang research reactor (CMRR) and neutron science facility in the Institute of Nuclear Physics and Chemistry (INPC),
as well as the China Spallation Neutron Source (CSNS). The distribution of the electric field was investigated with Garfield
toolkit, the results showed that the ratio of the electric field of the collect region to the drift region ( E c / E d ) must be
greater than a critical value Z (1.78). An individual experiment,
carried out with a compound alpha source ( 241 Am and 243 Am), was used to validate the preliminary performance of
this detector. The effects of the electric field on the anode pulse height agreed well with the simulation results. Furthermore, the
results also indicated that the energy resolution of (68.40 ± 1.07) keV at 5.39 MeV ( 243 Am) and (69.67 ± 1.09) keV at
5.49 MeV ( 241 Am) could be achieved. An initial in-beam fission
experiment of 235 U reaction with 14 MeV neutrons was also
performed to test the setup, and the results showed that the reconstructed emission angle could achieve a resolution of 0.221
± 0.002 on the difference of the cosines determined from both halves of TFGIC. The present work primarily reported the development
of a TFGIC with a digital acquisition system in INPC.
Type of Medium:
Online Resource
ISSN:
1748-0221
DOI:
10.1088/1748-0221/17/09/P09004
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
2235672-1
