Transverse RF focusing in bunching cells for standing-wave linac

Yang, Haeryong; Kim, S.H.; Park, S.J.; Oh, Jung-Min; Cho, M.; Namkung, W.

doi:10.1016/j.nima.2012.11.113

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The accelerating column was chosen as a bi-periodic on-axis coupled structure and operated in the π/2 standing-wave mode. The cell design in the accelerating column was based on transverse RF focusing, as described in [9], and was optimized for a peak RF power of 2.5 MW and an RF frequency of 5712 MHz. It was designed with an average accelerating gradient of 16.7 MW/m (for an input pulsed RF power of 2.5 MW, pulse width of 4 µs and repetition rate of 250 Hz), a quality factor of 9000, and a shunt impedance of 113 MΩ/m.…”

Section: Linac Descriptionmentioning

confidence: 99%

Implementation of ultra-high dose-rate electron beam from 6-MeV C-band linear accelerator for preclinical study

et al. 2020

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Recent biological studies with ultra-high dose-rate (> 40 Gy/s) irradiation demonstrate the killing of tumors along with a reduction in the side-effect on normal tissues. These features can suggest the alternative radiotherapy method. The radio-biological mechanisms need to be understood, and to be applied tumor treatment. Biological validations of the ultra-high dose-rate beam are required. The 6-MeV electron linear accelerator constructed in 2015 at the Dongnam Institute of Radiological & Medical Sciences was upgraded to generate an electron beam at an ultra-high dose rate and to provide preclinical irradiation for in vitro studies of cells and small animals. The irradiation device was designed with a dual scattering foil system to achieve a uniform beam distribution with a diameter of 30 mm at a distance of 110 mm from the primary foil. The 6-MeV accelerator operating with a 6-MW pulse modulator based on a thyratron-switched pulse-forming network provides beam operation per pulse utilizing a single-board computer to control the pulse timing. The film dosimetry at a depth of 10 mm in a water phantom of the irradiation device demonstrated that a beam with an RF power of 2.5 MW and an electron-gun heating current of 2 A produced a dose per pulse of 4.22±0.12 Gy/pulse. This resulted in a dose rate of 422 Gy/s with a pulse rate of 100 Hz. The upgraded accelerator was successfully tested for preclinical use and is currently in full operation with studies being performed on the radio-biological effects of ultra-high dose-rate beam. The paper describes the design features of the ultra-high dose-rate electron beam generated from the 6-MeV accelerator and the dose measurement using the irradiation device. The design of the preclinical irradiator is also discussed.

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Section: Linac Descriptionmentioning

confidence: 99%

Implementation of ultra-high dose-rate electron beam from 6-MeV C-band linear accelerator for preclinical study

et al. 2020

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“…One is by using solenoid magnets over cavity section and another by modifying cavity structure itself to provide focusing forces from RF fields. In the second case, the transverse focusing is obtained by introducing an asymmetry in the 1 st buncher cell and properly choosing phase velocities of all buncher cells [16][17][18].…”

Section: Beam Dynamics Of the Linacmentioning

confidence: 99%

Studies on a dual energy RF electron linac

2019

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“…Third, a small spot size of the output beam can improve the space resolution, and is often required for x-ray imaging applications such as industrial computed tomography and cargo inspection [23,24]. Without any outside focusing solenoid, a beam spot size with a diameter of less than 1.5 mm root mean square was set as a criterion in our design.…”

Section: B Beam Dynamics Studymentioning

confidence: 99%

Development of aC-band 6 MeV standing-wave linear accelerator

Shao

Zha

et al. 2013

Phys. Rev. ST Accel. Beams

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C-band low-energy electron linear accelerators are preferable for applications which require compact structure and accurate positioning. During the past two years, the accelerator laboratory of Tsinghua University has developed a C-band 6 MeV standing-wave biperiodic on-axis coupled linear accelerator. The weight of the accelerator is 7.4 kg and the length is about 39 cm, which includes the thermal-cathode gun and the flange for tests. High capture ratio, narrow energy spectrum, and small spot size have been achieved in the high power rf test, which shows good performance of this accelerator and its great potential for industrial and medical applications.

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Transverse RF focusing in bunching cells for standing-wave linac

Cited by 7 publications

References 14 publications

Implementation of ultra-high dose-rate electron beam from 6-MeV C-band linear accelerator for preclinical study

Implementation of ultra-high dose-rate electron beam from 6-MeV C-band linear accelerator for preclinical study

Studies on a dual energy RF electron linac

Development of aC-band 6 MeV standing-wave linear accelerator

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