Simulation of induced radioactivity for a heavy ion medical machine

Xu, Jing; Su, Yanan; Wy, Li; Wang, Mao; Xia, Ji‐Bao; Xm, Chen; Wu, Yan; Xu, Chong

doi:10.1088/1674-1137/38/11/118201

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…The results showed that the sound pressure level of HPDE is about 4 dB less than that of PDE, and that the impulse sound pressure level reduces about 2 dB. Xu et al [9][10][11][12][13] studied the formation and propagation process of PDE sound by combing the experimental method and numerical method. The results showed that the detonation peak noise is proportional to −3 power of the radial distance in near-field.…”

Section: Introductionmentioning

confidence: 99%

Acoustic characteristics of pulse detonation engine sound propagating in enclosed space*

Kang¹,

Li²,

Wang³

et al. 2020

Chinese Phys. B

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Acoustic characteristics of pulse detonation engine (PDE) sound propagating in enclosed space are numerically and experimentally investigated. The finite element software LS-DYNA is utilized to numerically simulate the PDE sound propagating in enclosed space. Acoustic measurement systems are established for testing the PDE sound in enclosed space, and the time-frequency characteristics of PDE sound in enclosed space are reported in detail. The experimental results show that the sound waveform of PDE sound in enclosed space are quite different from those in open space, and the reflection and superposition of PDE sound on the walls of enclosed space results in the sound pressure oscillating obviously. It is found that the peak sound pressure level (PSPL) and overall sound pressure level (OASPL) of PDE sound in enclosed space are higher than those in open space and their difference increases with the rise of propagation distance. The results of the duration of PDE sound indicate that the A duration of PDE sound in enclosed space is higher than that in open space except at measuring points located at 2-m and 5-m while the B duration is higher at each of all measuring points. Results show that the enclosed space has a great influence on the acoustic characteristic of PDE sound. This research is helpful in performing PDE experiments in enclosed laboratories to prevent the PDE sound from affecting the safety of laboratory environment, equipment, and staffs.

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Section: Introductionmentioning

confidence: 99%

Acoustic characteristics of pulse detonation engine sound propagating in enclosed space*

Kang¹,

Li²,

Wang³

et al. 2020

Chinese Phys. B

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“…With the development of heavy ion radiotherapy applications, two HIMMs (Heavy Ion Medical Machines) are currently being built in Lanzhou and Wuwei, Gansu, China, respectively. The details of such facilities are described in a previous article [10]. For the patient safety, it is significant to evaluate the neutron radiation field during the carbon ion therapy.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of neutron radiation field in carbon ion therapy

Xu¹,

Su²,

Li³

et al. 2016

Chinese Phys. C

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Carbon ions offer significant advantages for deep-seated local tumors therapy due to their physical and biological properties. Secondary particles, especially neutrons caused by heavy ion reactions should be carefully considered in treatment process and radiation protection. For radiation protection purposes, the FLUKA Code was used in order to evaluate the radiation field at deep tumor therapy room of HIRFL in this paper.The neutron energy spectra, neutron dose and energy deposition of carbon ion and neutron in tissue-like media was studied for bombardment of solid water target by 430MeV/u C ions. It is found that the calculated neutron dose have a good agreement with the experimental date, and the secondary neutron dose may not exceed 1‰ of the carbon ions dose at Bragg peak area in tissue-like media.

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“…Lead compounds have a very wide range of applications in various fields of national economy for its outstanding performance, which also makes a variety of industrial wastewater has become the source of pollution of lead in water [1] . Wastewater containing Pb 2+ without the rigorous treatment venting into natural water, will lead to water pollution, and greatly endanger people's health [2] . Therefore, the elimination of lead in wastewater has very important significance for both environmental protection and human health [3,4] .…”

Section: Introductionmentioning

confidence: 99%

Study on the Desorption Performance of Feather as a New Adsorption Material on Pb<sup>2+</sup>

Ren¹,

Hong

2012

AMR

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In this paper, feather was used to adsorb lead ions as a new type of adsorbent materials. For recycling feather, NaOH solutions as the desorption solutions were adopted to desorb feather after adsorption of lead ions, and then the factors which affect the desorption effect, such as desorption time, concentration of desorption solutions, temperature and so on were studied. It was found that the optimum desorption conditions are: the desorption time of 60min, the concentration of NaOH solutions of 30mmol/L, the temperature of 40°C.

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Simulation of induced radioactivity for a heavy ion medical machine

Cited by 4 publications

References 12 publications

Acoustic characteristics of pulse detonation engine sound propagating in enclosed space*

Acoustic characteristics of pulse detonation engine sound propagating in enclosed space*

Evaluation of neutron radiation field in carbon ion therapy

Study on the Desorption Performance of Feather as a New Adsorption Material on Pb<sup>2+</sup>

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