Positive ion extraction system design for the U-120M cyclotron

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Positive ion extraction system design for the U-120M cyclotron

Popis výsledku v původním jazyce

The goal of this dissertation is the design of a new extraction system for the extraction of positive ions from the U-120M cyclotron. For this purpose, precise measurements of the distribution of the cyclotron’s magnetic field were made using a reconstructed apparatus, for which the author of this work designed a new measuring part and wrote the control software. The author also performed magnetic measurements, based on which the disturbance amplitude in the magnetic field of the cyclotron was minimized. To analyze the operation of the original extraction system, the author created a CAD model of the original extraction elements and performed simulations that confirmed the low efficiency of this configuration. For the new extraction system, the author designed new external harmonic coils, which were installed in the magnetic system of the cyclotron during the accelerator shutdown in 2022. These coils largely compensate for the negative influence of the disturbed first harmonic component of the magnetic field and enable an increase in the output energy of the cyclotron in the negative ion mode. These coils also play an important role in the newly designed extraction system for positive ions, which now consists of two deflectors and two magnetic channels. This system requires a lower operating voltage of the deflectors compared to the original system and thus enables their long-term operation even in the proton mode of 36.7 MeV, where the original extraction system is not applicable. The work also shows the possibility of increasing the extraction efficiency for particles of lower energies by appropriate modification of the geometry of the extraction electrodes, which can be advantageously used even in the case of the existing extraction system.

Název v anglickém jazyce

Positive ion extraction system design for the U-120M cyclotron

Popis výsledku anglicky

The goal of this dissertation is the design of a new extraction system for the extraction of positive ions from the U-120M cyclotron. For this purpose, precise measurements of the distribution of the cyclotron’s magnetic field were made using a reconstructed apparatus, for which the author of this work designed a new measuring part and wrote the control software. The author also performed magnetic measurements, based on which the disturbance amplitude in the magnetic field of the cyclotron was minimized. To analyze the operation of the original extraction system, the author created a CAD model of the original extraction elements and performed simulations that confirmed the low efficiency of this configuration. For the new extraction system, the author designed new external harmonic coils, which were installed in the magnetic system of the cyclotron during the accelerator shutdown in 2022. These coils largely compensate for the negative influence of the disturbed first harmonic component of the magnetic field and enable an increase in the output energy of the cyclotron in the negative ion mode. These coils also play an important role in the newly designed extraction system for positive ions, which now consists of two deflectors and two magnetic channels. This system requires a lower operating voltage of the deflectors compared to the original system and thus enables their long-term operation even in the proton mode of 36.7 MeV, where the original extraction system is not applicable. The work also shows the possibility of increasing the extraction efficiency for particles of lower energies by appropriate modification of the geometry of the extraction electrodes, which can be advantageously used even in the case of the existing extraction system.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů