CYCLOTRONS2022 - List of Keywords (FPGA)

Paper	Title	Other Keywords	Page
MOPO016	Control of Cyclotron Vertical Deflector for Proton Therapy	controls, cyclotron, proton, high-voltage	95
	F.D. Yang, T.Y. Jiang, X. Mu, Y. Wang, Z.G. Yin, T.J. Zhang CIAE, Beijing, People’s Republic of China X.L. Fu TRIUMF, Vancouver, Canada
	China Institute of Atomic Energy (CIAE) has designed a superconducting cyclotron CYCIAE-230 to enhance the domestic development of proton therapy. A research program on the beamline and experimental stations for the proton therapy and the space science was launched by China National Nuclear Corporation (CNNC). The modern therapy methodology often requires rapid beam modulation on both the beam energy and the intensity. In this scenario, a vertical deflector is designed and installed in the cyclotron’s central region. Applying a high-voltage electric field between the two plates can quickly adjust the intensity of the low-energy beam. Nevertheless, the voltage applied is nonlinear to the beam intensity. According to this requirement, a homemade controller for the vertical deflector is designed. Since the beam loss caused by the energy degrader is also nonlinear, this controller can compensate for the beam loss caused by energy modulation. To realize real-time control, the controller combines Field Programmable Gate Array (FPGA) and Digital Signal Process (DSP) as its control scheme design. Carried out by the DSP by interpolating the lookup table data, a feed-forward regulation is also designed to take care of the nonlinear compensation for the beam loss on the energy degrader. In the meantime, an ionized chamber provides feedback readings of the intensity just before the nozzle. A PID algorithm is also included by using FPGA, to archive the feedback control of the vertical deflector.
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO016
About •	Received ※ 30 December 2022 — Revised ※ 27 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 02 May 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPO011	Upgrading the Beam Diagnostic of the HZB-Cyclotron from an Analogue to a new Digital Platform	cyclotron, interface, EPICS, controls	228
	J. Bundesmann, A. Denker, A. Dittwald, T. Fanselow, G. Kourkafas HZB, Berlin, Germany
	The HZB-Cyclotron delivers since a long time reliable beam for experiments and Proton Therapy. Now the old analogue beam diagnostic is outdated and hard to maintain. We developed a digital replacement for the multiplexers for 30 Faraday cups and 12 beam profile monitors. Both use as hardware platform a single-board-controller with FPGA-technology with integrated analogue and digital signals in a client-server architecture. Here we present the new features after more than one year of operation.
	Poster WEPO011 [1.061 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO011
About •	Received ※ 30 December 2022 — Revised ※ 17 January 2023 — Accepted ※ 01 February 2023 — Issue date ※ 26 March 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPO016

Control of Cyclotron Vertical Deflector for Proton Therapy

controls, cyclotron, proton, high-voltage

95

F.D. Yang, T.Y. Jiang, X. Mu, Y. Wang, Z.G. Yin, T.J. Zhang
CIAE, Beijing, People’s Republic of China
X.L. Fu
TRIUMF, Vancouver, Canada

China Institute of Atomic Energy (CIAE) has designed a superconducting cyclotron CYCIAE-230 to enhance the domestic development of proton therapy. A research program on the beamline and experimental stations for the proton therapy and the space science was launched by China National Nuclear Corporation (CNNC). The modern therapy methodology often requires rapid beam modulation on both the beam energy and the intensity. In this scenario, a vertical deflector is designed and installed in the cyclotron’s central region. Applying a high-voltage electric field between the two plates can quickly adjust the intensity of the low-energy beam. Nevertheless, the voltage applied is nonlinear to the beam intensity. According to this requirement, a homemade controller for the vertical deflector is designed. Since the beam loss caused by the energy degrader is also nonlinear, this controller can compensate for the beam loss caused by energy modulation. To realize real-time control, the controller combines Field Programmable Gate Array (FPGA) and Digital Signal Process (DSP) as its control scheme design. Carried out by the DSP by interpolating the lookup table data, a feed-forward regulation is also designed to take care of the nonlinear compensation for the beam loss on the energy degrader. In the meantime, an ionized chamber provides feedback readings of the intensity just before the nozzle. A PID algorithm is also included by using FPGA, to archive the feedback control of the vertical deflector.

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO016

About •

Received ※ 30 December 2022 — Revised ※ 27 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 02 May 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPO011

Upgrading the Beam Diagnostic of the HZB-Cyclotron from an Analogue to a new Digital Platform

cyclotron, interface, EPICS, controls

228

J. Bundesmann, A. Denker, A. Dittwald, T. Fanselow, G. Kourkafas
HZB, Berlin, Germany

The HZB-Cyclotron delivers since a long time reliable beam for experiments and Proton Therapy. Now the old analogue beam diagnostic is outdated and hard to maintain. We developed a digital replacement for the multiplexers for 30 Faraday cups and 12 beam profile monitors. Both use as hardware platform a single-board-controller with FPGA-technology with integrated analogue and digital signals in a client-server architecture. Here we present the new features after more than one year of operation.

Poster WEPO011 [1.061 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO011

About •

Received ※ 30 December 2022 — Revised ※ 17 January 2023 — Accepted ※ 01 February 2023 — Issue date ※ 26 March 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)