Material development towards a solid 100 kW electron-gamma converter for TRIUMF-ARIEL

Egoriti, L.; Cervantes, Marla; Goodacre, T. Day; Gottberg, A.

doi:10.1016/j.nimb.2019.05.031

Cited by 5 publications

(7 citation statements)

References 11 publications

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“…In this work, the development of a static tantalum (Ta) conversion target and Aluminum (Al) flange using an explosion-bonded interface (Egoriti et al 2020) has been explored with the goal of optimizing dose-rates within the thermomechanical constraints of the target system. The Ta-Al converter, and ancillary systems, have been developed for use on the high-powered electron linac of the Advanced Rare Isotope Laboratory (ARIEL) at TRIUMF (Vancouver, CA).…”

Section: Introductionmentioning

confidence: 99%

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

et al. 2022

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Objective: To develop a bremsstrahlung target and megavoltage (MV) x-ray irradiation platform for ultrahigh dose-rate (UHDR) irradiation of small-animals for the Advanced Rare Isotope Laboratory (ARIEL) electron linac (e-linac) at TRIUMF. Approach: An electron-to-photon converter design for UHDR radiotherapy (RT) was centered around optimization of a tantalum-aluminum (Ta-Al) explosion-bonded target. Energy deposition within a homogeneous water-phantom and the target itself were evaluated using EGSnrc and FLUKA MC codes, respectively, for various target thicknesses (0.5-1.5 mm), beam energies (Ee-=8,10 MeV) and electron (gaussian) beam sizes (2σ=2-10 mm). Depth dose-rates in a 3D-printed mouse phantom were also calculated to infer the compatibility of the 10 MV dose distributions for FLASH-RT in small-animal models. Coupled thermo-mechanical FEA simulations in ANSYS were subsequently used to inform the stress-strain conditions and fatigue life (N) of the target assembly. Main Results: Dose-rates of up to 128 Gy s-1 at the phantom surface, or 85 Gy s-1 at 1-cm depth, were obtained for a 1x1 cm2 field size, 1-mm thick Ta target and 7.5 cm source-to-surface distance using the nominal treatment-beam configuration (Ee-=10 MeV,2σ=5 mm,P=1 kW); furthermore, removal of the collimation assembly and using a shorter (3.5 cm) SSD afforded dose-rates >600 Gy s-1, albeit at the expense of field conformality. Target temperatures were maintained below the tantalum, aluminum and cooling-water thresholds of 2000, 300 and 100 °C, respectively, while the aluminum strain behavior remained everywhere elastic and helped ensure N>3000 thermal cycles could be tolerated over the prescribed 5 yr life of the target. Significance: Effective design iteration, target cooling and failure mitigation have thus culminated in a robust target compatible with intensive transient (FLASH) and steady-state (diagnostic) applications. The ARIEL UHDR photon source will facilitate FLASH-RT experiments concerned with sub-second, pulsed or continuous beam irradiations at dose rates in excess of 40 Gy s-1.

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Section: Introductionmentioning

confidence: 99%

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

et al. 2022

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“…Target stations for RIB production ARIEL will add two additional target stations for RIB production, which can be operated in parallel with one of the ISAC targets. The first target station will use an electron driver beam incident on a high-Z converter material to generate gamma rays [3]. The gamma rays pass through a uranium carbide target producing radioactive nuclides through photofission.…”

Section: Ariel Overviewmentioning

confidence: 99%

CANREB EBIS commissioning at TRIUMF

Schultz

Charles

Cavenaile

et al. 2022

J. Phys.: Conf. Ser.

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The Canadian Rare Isotope facility with Electron Beam ion source (CANREB) is an essential part of the Advanced Rare IsotopE Laboratory (ARIEL) presently under construction at TRIUMF. CANREB was recently commissioned and can accept stable or rare isotope beams from a variety of ion sources, delivering high purity beams of highly charged ions (HCI) to experiments. The injected beams are bunched using a radiofrequency quadrupole cooler-buncher and energy adjusted using a pulsed drift tube for injection into the electron beam ion source (EBIS) charge state breeder. The EBIS is designed for a maximum electron beam current of 500 mA and a maximum magnetic field of 6 T. Ions with energies up to 14 keV can be injected and HCI with mass-to-charge (A/q) ratios 3 ⩽ A/q ⩽ 7 can be charge bred and extracted. The HCI are A/q-selected using a Nier-type spectrometer before being transported to the ISAC linac for post-acceleration. Results from CANREB beam commissioning with focus on the EBIS will be presented.

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“…The 300 keV test stand operating at powers up to 3 kW can simulate the sort of power density that will be encountered in the future 30 MeV/100 kW ARIEL targets. These tests allowed a gold-on-aluminum option to be ruled out and a tantalum-on-aluminum target to be validated as a viable option [6].…”

Section: Pre-ariel Science In the Electron Hallmentioning

confidence: 99%

ARIEL Accelerator Overview

Planche

Pachal

Milner

2022

J. Phys.: Conf. Ser.

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Material development towards a solid 100 kW electron-gamma converter for TRIUMF-ARIEL

Cited by 5 publications

References 11 publications

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

CANREB EBIS commissioning at TRIUMF

ARIEL Accelerator Overview

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Material development towards a solid 100 kW electron-gamma converter for TRIUMF-ARIEL

Cited by 5 publications

References 11 publications

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

Design optimization of an electron-to-photon conversion target for ultra-high dose rate x-ray (FLASH) experiments at TRIUMF

CANREB EBIS commissioning at TRIUMF

ARIEL Accelerator Overview

Contact Info

Product

Resources

About

Material development towards a solid 100 kW electron-gamma converter for TRIUMF-ARIEL