In:
Journal of Instrumentation, IOP Publishing, Vol. 18, No. 03 ( 2023-03-01), p. P03005-
Abstract:
Ultra-short, ultra-intense laser pulses can create extreme
physical conditions for a wide range of applications in atomic and molecular physics, materials chemistry, and inertial-confinement
fusion. However, laser-matter interactions can be accompanied by significant X-ray emission that introduces radiation risks to the
nearby environment and personnel. It is usually to monitor the radiation dose during in high-intensity laser-target interactions
with optically stimulated luminescence and thermo-luminescence devices. However, these passive methods cannot measure the radiation
dose in real time, while most active dosimeters cannot accurately measure pulsed radiation doses. Here, transient pulse X-ray
radiation doses are converted by CdWO 4 crystals into slow
signals. Because the crystals have a 14-μs luminescence decay time, they can absorb sub-nanosecond X-ray pulses and release the
energy at a 100-μs rate, thus reducing the linear-response pressure of subsequent devices. A pulse detector based on a
CdWO 4 crystal, a phototube, and a custom signal-processing
circuit was developed. Experiments were performed at the 45-TW femtosecond laser facility of the Laser Fusion Research Center. The
detector deviation was less than ±20% relative to that of an ionization-chamber detector. This initially verified its feasibility
for real-time pulsed X-ray radiation detection.
Type of Medium:
Online Resource
ISSN:
1748-0221
DOI:
10.1088/1748-0221/18/03/P03005
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
2235672-1
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