Conceptual Design for the New RPI 2020 Linac

Adolphsen, C.; Bane, K.; Dolgashev, Valery; Jensen, Aaron; Haase, Andrew; Jongewaard, E.; Kemp, Mark A.; Krasnykh, A.; Lewandowski, J.; Li, Z.; Neilson, J.; Pearson, Colin M.; Tantawi, Sami; Wang, J.; Yeremian, A.D.; Brand, Patrick; Danon, Y.; Epping, Brian; Donovan, Terry; Block, R.C.; Leinweber, G.

doi:10.2172/1344166

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…For 18 MeV 325 mA, and R=40 MΩ/m for L-band structures (Adolphsen et al, 2014) this translates to 9.9 MW RF power in case of a 2-m-long linac. This power can be provided by E3736H klystron that operates at 1.3 GHz and yields 10 MW at 1.5% duty cycle (Canon, 2023).…”

Section: Accelerator Designmentioning

confidence: 99%

“…A conceptual design for the typical high-current linac is presented in Figure 2. While this design differs from those of standard medical linacs, the design is characteristic of those found in high-current industrial settings and scientific laboratories (Adolphsen et al, 2014;Kutsaev, 2021a) The thermionic electron gun with a DC Pierce geometry gun and gridded cathode can provide 1.5-3 A continuous beam, accelerated to 100-150 keV energies, so that losses in the injection system yield at least 25% of the initial current after the acceleration.…”

Section: Accelerator Designmentioning

confidence: 99%

“…The SW structure is a scaled to L-band version of an S-band linac that we are currently building for the demonstration version of FLASH (Kutsaev et al, 2022). The TW structure has a geometry similar to a 40 MeV L-band linac for neutron production that is being built by RadiaBeam for Rensselaer Polytechnic Institute (Adolphsen et al, 2014), optimized for the highest shunt impedance (R sh ).…”

Section: Frontiers In Medical Engineeringmentioning

confidence: 99%

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Feasibility study of high-power electron linac for clinical X-ray ROAD-FLASH therapy system

Kutsaev,

Agustsson,

Boucher

et al. 2024

Front. Med. Eng.

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Introduction: This study examines how a practical source of X-ray radiation, capable of delivering unprecedented X-ray of 100 Gy/s at 1 m for X-ray FLASH radiotherapy can be designed.Methods: We proposed the design of a linac, capable of accelerating 18 MeV 8 mA electron beam with further conversion to bremsstrahlung X-rays. The design is based on L-band traveling wave accelerating structures with high power efficiency, operating in a short-burst/long-pulse regime that allows operating power supply in a regime, beyond its specifications.Results: This study demonstrates the feasibility of a high-power linac for a clinical X-ray FLASH therapy system, using detailed analysis and simulations. Despite ∼500x higher output than a standard clinical linac, the design utilizes available accelerator components for maximal practicality.Discussion: Recent studies have demonstrated that the FLASH effect that allows to effectively kill tumor cells while sparing normal tissue occurs when large dose rates (≥40 Gy/s) are delivered in less than 1 s. Photons are very attractive since modest energies of several MeV are needed, which can be achieved with compact and cost-efficient accelerators. However, since the efficiency of electron-to-photon conversion is only a few percent, the required beam intensity must be an order of magnitude higher than that state-of-the-art accelerators can provide. The proposed ROAD-FLASH accelerator layout allows achieving both the FLASH dose rate and superior dose conformity, comparing to the similar projects. The current paper focuses on providing a technical roadmap for building an economical and practical linear accelerator for ROAD X-ray FLASH delivery.

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Section: Accelerator Designmentioning

confidence: 99%

Section: Accelerator Designmentioning

confidence: 99%

Section: Frontiers In Medical Engineeringmentioning

confidence: 99%

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Feasibility study of high-power electron linac for clinical X-ray ROAD-FLASH therapy system

Kutsaev,

Agustsson,

Boucher

et al. 2024

Front. Med. Eng.

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“…In general, industrial-grade accelerators with multi-MW RF power [60][61][62][63] tend to have a shorter 1-3 cell buncher design to trade off the capture efficiency for compactness and simplicity, while high-current and scientific-grade linacs [64] implement a classical "prebuncher-buncher-accelerator" concept to maximize capture.…”

Section: Buncher Types Overview and Design Strategymentioning

confidence: 99%

Electron bunchers for industrial RF linear accelerators: theory and design guide

Kutsaev

2021

Eur. Phys. J. Plus

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The acceleration of electrons in resonant linear accelerators (linacs) typically consists of three main stages: (1) emission of the electrons from the cathode and their pre-acceleration with a DC field to the energy of tens of keV; (2) grouping the DC electron beam into bunches and their synchronization with the correct phase of high-frequency electromagnetic fields, and (3) accelerating the bunches of relativistic electrons to the required energies. Although many books describe the theoretical and practical aspects of electron linac design, most of them concentrate on beam physics in either the gun stage or in the relativistic regime, while leaving the description of the bunching process rather general. The physics of non-relativistic motion is described in the literature on ion accelerators, but in practice, it cannot be scaled to electron machines due to the significantly different particle mass and acceleration rate, beam velocity change, and frequencies. In this tutorial review paper, we will fill this gap with a detailed description of the bunching process and provide practical advice on the design of bunching sections in industrial-grade electron linacs.

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Conceptual Design for the New RPI 2020 Linac

Cited by 2 publications

References 3 publications

Feasibility study of high-power electron linac for clinical X-ray ROAD-FLASH therapy system

Feasibility study of high-power electron linac for clinical X-ray ROAD-FLASH therapy system

Electron bunchers for industrial RF linear accelerators: theory and design guide

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