Primary experimental results of wire-array Z-pinches on PTS

Huang, Xianbin; Zhou, Su-Qin; Ren, Xiaodong; Dan, Jiakun; Wang, K. L.; Zhang, S. Q.; Li, J.; Xu, Qiang; Cai, Hongchun; Shuchao, 段书超 Duan; Ouyang, Kai; Chen, G. H.; Ji, Ce; Wang, M.; Shi, Feng; Yang, L. B.; Xie, Weiping; Deng, Jianjun

doi:10.1063/1.4904786

Cited by 5 publications

(3 citation statements)

References 6 publications

(6 reference statements)

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“…In the presence of S1 nuclease, G-rich ODN was cleaved into mono-or oligonucleotide fragments and no G4-H system formed. The free hemin can conjugate with the Au NCs and quenches its fluorescence due to its special affinities to proteins [25]. The photoinduced electron transfer (PET) between hemin and Au NCs contributes to the remarkable decrease of fluorescence [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

General Gel-sol Method to Synthesize Various Highly Fluorescent Nanoclusters and Assay of Nuclease with the Near Infrared-emitting Gold Nanoclusters

Xia

Luo

2023

J Fluoresc

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A general egg white gel-sol strategy for fabrication of highly fluorescent Au, Ag, Cu and Pt nanoclusters (NCs) and the first example of using Au NCs for assay of nuclease activity and inhibition were described. The Au NCs enabled bright red fluorescence, and the other Ag, Cu and Pt NCs have highly blue emission. The red-emitting Au NCs were further applied in assay of S1 nuclease activity and inhibition. Free hemin efficiently quenches the emission of Au NCs by photoinduced electron transfer due to formation of Au NCs-hemin conjugates. However, G-quadruplex/hemin exerts negligible effect on its fluorescence due to no Au NCs-hemin conjugate formed. There are stronger electrostatic repulsion effects between both negatively charged G-quadruplex and Au NCs. Therefore, a novel Gquadruplex/hemin-based Au NCs fluorescent sensor for S1 nuclease was designed. A known G-rich oligonucleotide (ODN) serves as not only substrate for S1 nuclease but also for the construction of Gquadruplex/hemin. The G-rich ODN is hydrolyzed into fragments by S1 nuclease resulting in no Gquadruplex/hemin formation. Therefore, the free hemin quenches Au NCs fluorescence remarkably and the assay of S1 nuclease activity and inhibition has accomplished. Both the fluorescent NCs syntheses and the detection of S1 nuclease are facile and efficient.

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Section: Introductionmentioning

confidence: 99%

General Gel-sol Method to Synthesize Various Highly Fluorescent Nanoclusters and Assay of Nuclease with the Near Infrared-emitting Gold Nanoclusters

Xia

Luo

2023

J Fluoresc

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“…19 In these experiments, single or nested tungsten wire array z-pinch loads were used. Additional purpose of the experiments reported here was to investigate similarities and differences between PTS and other pulsed power drivers, such as Z, Saturn, Angara-5-1, and MAGPIE, and to characterize peculiarities of wire array implosion under the driven level and rise time of PTS.…”

Section: Introductionmentioning

confidence: 99%

Preliminary experimental results of tungsten wire-array Z-pinches on primary test stand

et al. 2015

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The Primary Test Stand (PTS) developed at the China Academy of Engineering Physics is a 20 TW pulsed power driver, which can deliver a ∼10 MA, 70 ns rise-time (10%–90%) current to a short-circuit load and has important applications in Z-pinch driven inertial confinement fusion and high energy density physics. Preliminary results of tungsten wire-array Z-pinch experiments on PTS are presented. The load geometries investigated include 15-mm-tall cylindrical single and nested arrays with diameter ranging from 13 mm to 30 mm, consisting of 132–300 tungsten wires with 5–10 μm in diameter. Multiple diagnostics were fielded to characterize the x-ray radiation from wire-array Z pinches. The x-ray peak power (∼50 TW) and total radiated energy (∼500 kJ) were obtained from a single 20-mm-diam array with 80-ns stagnation time. The highest x-ray peak power up to 80 TW with 2.4 ns FWHM was achieved by using a nested array with 20-mm outer diameter, and the total x-ray energy from the nested array is comparable to that of single array. Implosion velocity estimated from the time-resolved image measurement exceeds 30 cm/μs. The detailed experimental results and other findings are presented and discussed.

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“…7 It is the most powerful Z-pinch facility in China. More than 30 shots Z-pinch experiments have been performed on it, 13,14 and high energy photons have also been investigated during these experiments.…”

Section: Introductionmentioning

confidence: 99%

Measurements of high energy photons in Z-pinch experiments on primary test stand

Zhang

et al. 2015

Review of Scientific Instruments

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High energy photons are measured for the first time in wire-array Z-pinch experiments on the Primary Test Stand (PTS) which delivers a current up to 8 MA with a rise time of 70 ns. A special designed detecting system composed of three types of detectors is used to measure the average energy, intensity, and pulse waveform of high energy photons. Results from Pb-TLD (thermoluminescence dosimeter) detector indicate that the average energy is 480 keV (±15%). Pulse shape of high energy photons is measured by the photodiode detector consisted of scintillator coupled with a photodiode, and it is correlated with soft x-ray power by the same timing signal. Intensity is measured by both TLD and the photodiode detector, showing good accordance with each other, and it is 10(10) cm(-2) (±20%) at 2 m in the horizontal direction. Measurement results show that high energy photons are mainly produced in pinch regions due to accelerated electrons. PTS itself also produces high energy photons due to power flow electrons, which is one order smaller in amplitude than those from pinch region.

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Primary experimental results of wire-array Z-pinches on PTS

Cited by 5 publications

References 6 publications

General Gel-sol Method to Synthesize Various Highly Fluorescent Nanoclusters and Assay of Nuclease with the Near Infrared-emitting Gold Nanoclusters

General Gel-sol Method to Synthesize Various Highly Fluorescent Nanoclusters and Assay of Nuclease with the Near Infrared-emitting Gold Nanoclusters

Preliminary experimental results of tungsten wire-array Z-pinches on primary test stand

Measurements of high energy photons in Z-pinch experiments on primary test stand

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