Feasibility studies of RFQ based 14C accelerator mass spectrometry

Guo, Zhiyu; Liu, Kexin; Yan, Xueqing; Xie, Yi; Fang, Jing; Chen, Jiaer

doi:10.1016/j.nimb.2007.01.159

Cited by 11 publications

(7 citation statements)

References 10 publications

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“…A beam dynamics design with energy spread 0.6% has been realized for 14 C + beam using this method [12] . However, the prebuncher used to produce a pulsed beam from a DC beam before the RFQ makes the system complex, and the total beam transmission efficiency is constrained by it.…”

Section: Problems and Solutions Of Rfq-based Implantersmentioning

confidence: 99%

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Nie¹,

Lu²,

Yan³

et al. 2012

Ion Implantation

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Section: Problems and Solutions Of Rfq-based Implantersmentioning

confidence: 99%

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Nie¹,

Lu²,

Yan³

et al. 2012

Ion Implantation

Self Cite

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“…It is obvious that the closer the loop is to the stem, the stronger H z becomes and thus the smaller the loop area required can be. Supposing the average of H z in the loop plane is 1000 A/m, the loop area needed will be about 40 cm 2 according to (6). On this basis, an optimum design of the coupling loop was achieved by means of MWS's transient solver, shown in Fig.…”

Section: Power Couplingmentioning

confidence: 99%

“…The two main aspects when designing a RFQ are beam dynamics and RF structure [3][4][5]. For the 104 MHz RFQ at Peking University aiming at 14 C + acceleration from 40 keV to 500 keV, the novel low-energy-spread beam dynamics design has been successfully realized using the internal discrete bunching strategy with RFQDYN program derived from PARMTEQ, instead of the external bunching method in [6]. On the other hand, considering the relatively high operating frequency, the ladder type IH-RFQ structure is adopted, which possesses the highest resonant frequency compared with traditional IH and 4-Rod RFQ under the same transverse dimension, by virtue of its H 210 electromagnetic mode and the novel stem arrangement [7].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on 104 MHz Radio Frequency Quadrupole Accelerator

Nie

Gao

et al. 2010

2010 International Conference on E-Product E-Service and E-Entertainment

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An electrical model of the 104 MHz radio frequency quadrupole (RFQ) accelerator at Peking University is introduced for RF design, based on which every crucial geometrical parameter is swept and selected carefully to improve the RF properties of the RFQ such as the intrinsic quality factor and shunt impedance for reducing its power consumption. Moreover, flatness tuning of the inter-electrodes voltage is investigated in principle. Also, a magnetic coupling loop is designed for power feeding of the RFQ cavity from transmitter. Relevant numerical simulations are performed using 3D electromagnetic field program CST Microwave Studio (MWS).

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“…The advantages are: the RFQ accelerator can be made very short (<1 m); it needs no isolation gas and has a much higher current output than a tandem accelerator; also, both the ion source and the detector system are at ground potential so its operation and maintenance are much easier. Awell designed RFQ accelerator has a low energy spread and a high isotopic selection (Guo et al, 2007).…”

Section: B Attempts At Using Other Types Of Accelerators For Amsmentioning

confidence: 99%

Accelerator mass spectrometry

Hellborg

Skog

2008

Mass Spectrometry Reviews

101

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In this overview the technique of accelerator mass spectrometry (AMS) and its use are described. AMS is a highly sensitive method of counting atoms. It is used to detect very low concentrations of natural isotopic abundances (typically in the range between 10 À12 and 10 À16) of both radionuclides and stable nuclides. The main advantages of AMS compared to conventional radiometric methods are the use of smaller samples (mg and even sub-mg size) and shorter measuring times (less than 1 hr). The equipment used for AMS is almost exclusively based on the electrostatic tandem accelerator, although some of the newest systems are based on a slightly different principle. Dedicated accelerators as well as older ''nuclear physics machines'' can be found in the 80 or so AMS laboratories in existence today. The most widely used isotope studied with AMS is 14 C. Besides radiocarbon dating this isotope is used in climate studies, biomedicine applications and many other fields. More than 100,000 14 C samples are measured per year. Other isotopes studied include 10 Be, 26 Al, 36 Cl, 41 Ca, 59 Ni, 129 I, U, and Pu. Although these measurements are important, the number of samples of these other isotopes measured each year is estimated to be less than 10% of the number of 14 C samples.

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Feasibility studies of RFQ based 14C accelerator mass spectrometry

Cited by 11 publications

References 10 publications

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Simulation Study on 104 MHz Radio Frequency Quadrupole Accelerator

Accelerator mass spectrometry

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