Design of beam instrumentation for in-vacuum materials irradiation and testing in a 30 MeV medical cyclotron

Yüksel, Alper Nazmi; Turemen, G.; Bulut, S.; Serin, Nihal Öykü; Yavas, O.

doi:10.1016/j.nima.2020.164290

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The METU-DBL, shown in figure 1, project was started in 2015 and completed in 2021 [7]. A continuous proton beam between 15-30 MeV is delivered by TENMAK PAF [8] to METU-DBL, where the beam is collimated and then expanded to a maximum 15.40×21.55 cm area by 3 quadrupole magnets and a long flight path. The exposure area can be adjusted to smaller sizes by adjusting quadrupole magnets.…”

Section: Metu Defocussing Beamlinementioning

confidence: 99%

METU-DBL: a cost effective proton irradiation facility

et al. 2023

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The Middle East Technical University Defocusing Beamline (METU-DBL) is designed to deliver protons with selectable kinetic energies between 15–30 MeV, and proton flux between 106–1010 protons/cm2/s, on a maximum 21.55 to 15.40 cm target region with a beam uniformity within ±6%, in accordance with the ESA ESCC No. 25100 specification for single event effects (SEEs) tests in the low energy range. The achieved high proton fluences, allow users to test space-grade materials; electronic circuits, ASICs, FPGAs, optical lenses, structural elements, and coating layers for LEO, GEO, and interplanetary missions. The total received dose on the Device-Under-Test (DUT) from secondary particles created during proton-material interactions at the first beam collimator and the beam dump never exceed 0.1% of the dose from primary protons. The METU-DBL is equiped with several measurement stations and services to the user teams. A secondary measurement station in a rotating drum that can hold multiple samples has been constructed next to the first collimator which provides neutrons for transmission experiments. At the target region, a robotic table is located, which provides mechanical and electrical mounting points to the samples and allows multiple samples to be tested in a row. A modular vacuum box can also be attached on the robotic table for any test that may require a vacuum environment. Power rails on the robotic table provide various outputs for the DUT. For the data acquisition, high-speed networking and a modular industrial PC are available at the target station. The design of the METU-DBL control software enables test users to integrate and optimize the data acquisition and controlling of the DUT. The beam properties at the target region are measured with the diamond, Timepix3, and fiber scintillator detectors mounted on the robotic table. With diamond and Timepix3 detectors, measurements are taken from the five different points (center and the four corners) of the test area to measure the proton flux and ensure that it is uniform across the full test area. Fiber scintillators on both axes (X and Y) scan the target area to cross-check the beam profile's uniformity. Secondary doses during the irradiation are measured by a Geiger-Müller tube sensitive to electrons and gammas above 0.1 MeV and by a neutron detector located at the entrance of the R&D room. The room cools down relatively fast after any irradiation (<1 hour). Accurate linear energy deposition rates and absorbed doses on the samples are calculated using MCNP6, FLUKA and Geant4 Monte Carlo simulations. Alanine dosimetry measurements that are calibrated against these simulations are also used to estimate the absorbed dose on the sample.

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Section: Metu Defocussing Beamlinementioning

confidence: 99%

METU-DBL: a cost effective proton irradiation facility

et al. 2023

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“…Demagnetization was performed to remove residual magnetic fields in the magnet, before starting the test. Magnet demagnetization was performed with a maximum of +240 A and a minimum −240 A, the current was decreased by 1 3 of previous amplitude at each step. This process was repeated for five steps so that residual magnetic fields on the magnet were cleansed.…”

Section: Magnetic Testsmentioning

confidence: 99%

“…Middle East Technical University Defocusing Beam Line (METU-DBL) project is designed to perform the Single Event Effects (SEEs) radiation tests at Turkish Atomic Energy Authority Department of Radiation and Accelerator Technologies Proton Accelerator Facility (TENMAK NÜKEN-PAF) [1]. This beam line uses the proton beam in the range of 15-30 MeV kinetic energy to perform radiation tests in accordance with ESA ESCC No.25100 specification [2].…”

Section: Introductionmentioning

confidence: 99%

Quadrupole magnet design, manufacturing and the acceptance tests for METU-defocusing beamline

et al. 2023

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Middle East Technical University Defocusing Beam Line (METU-DBL) performs the Single Event Effects (SEEs) radiation tests with protons in the range of 15 MeV to 30 MeV kinetic energy at Turkish Atomic Energy Authority Proton Accelerator Facility (TENMAK NÜKEN-PAF) for space and nuclear applications. The most critical beam transfer elements in the METU-DBL are three quadrupole magnets, which are used for defocusing the beam like optical lenses. The first two quadrupole magnets were purchased commercially, and the third quadrupole magnet was designed by the METU-DBL project team and manufactured by Sönmez Transformer Inc. in Turkey. Electronic, mechanic and magnetic capability tests of this custom-designed magnet were conducted both at TUBITAK and CERN facilities. After passing the acceptance tests, the magnet was certified by CERN and then installed to METU-DBL as a third quadrupole magnet. In this paper, we present details of the design, production and performed tests of the quadrupole magnet.

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Application of non-destructive analysis methods in TENMAK-PAF

Bulut

2024

Applied Radiation and Isotopes

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Design of beam instrumentation for in-vacuum materials irradiation and testing in a 30 MeV medical cyclotron

Cited by 5 publications

References 3 publications

METU-DBL: a cost effective proton irradiation facility

METU-DBL: a cost effective proton irradiation facility

Quadrupole magnet design, manufacturing and the acceptance tests for METU-defocusing beamline

Application of non-destructive analysis methods in TENMAK-PAF

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