CYCLOTRONS2022 - List of Keywords (diagnostics)

Paper	Title	Other Keywords	Page
MOPO012	An Embedded Beam Diagnostic Electronics for 230 MeV Superconducting Cyclotron Radial Probe and Scanning Wires	electron, electronics, cyclotron, embedded	80
	T.Y. Jiang, P. Liu, X. Mu, Q.Q. Song, Y. Wang, Z.G. Yin, T.J. Zhang CIAE, Beijing, People’s Republic of China
	For the 230MeV superconducting cyclotron, once again, the differential radial probe has been proven to be crucial for the beam commission procedure. It can provide various information about the particles inside the cyclotron, such as the vertical position, the relative intensity as well as the oscillation frequency and radius, etc. In practice, however, the electronics system suffered from the leaking alternating RF field as well as the static magnetic field. Besides the EM shielding, an absorptive high-frequency filter has been included as the first element of the readout electronics. A high dynamic range readout electronic unit has been included to adapt to the fluctuation of the beam in the hole commissioning phase. The electronics box is designed as a network-attached embedded device so that it can be powered by a POE switch and transmits measurement results via MODBUS protocol. A dedicated digital signal processor and calibration units are also included, together with the ADCs, to facilitate the daily calibration process. The same electronics are used for the beamline wire scan system to determine the position of the beam, with a small improvement at a lower range. The design of this multi-purpose beam diagnostics electronics will be reviewed in this paper, together with several measurement results. zhiguoyin@ciae.ac.cn
	Poster MOPO012 [0.721 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO012
About •	Received ※ 01 January 2023 — Revised ※ 27 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 27 April 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPO012	Upgrade of Beam Diagnostic Systems at JULIC Cyclotron	cyclotron, operation, controls, experiment	231
	Y. Valdau, O. Felden, R. Gebel, U.G. Giesen, R.L. Lohoff, H. Soltner FZJ, Jülich, Germany N.-O. Fröhlich DESY, Hamburg, Germany P.J. Niedermayer GSI, Darmstadt, Germany
	The cyclotron JULIC is used as injector for the COSY storage ring since almost 30 years. Beams of polarized and unpolarised H⁻ and D- ions are routinely accelerated using cyclotron HF system up to 45 and 55 MeV, respectively. Meanwhile, low energy beams from JULIC become more frequently used by the experimentalists, especially at the new low energy beam line, which connects cyclotron with the large Big Karl experimental hall. To meet the requirements of the cyclotron users a diagnostic system upgrade program has been started at the JULIC cyclotron. All destructive beam diagnostic systems (Faraday Cups) have been equipped with a new produced by CAEN TetrAMM based beam diagnostic systems. All TetrAMM devices are implemented into the common COSY Control System with EPICS readout and archiving environment. The cyclotron NMR field control system has been upgraded using the newest sensor from Metrolab (PT2026), which allows operation in complete field range of the JULIC cyclotron, without changing the sensor. A new Lock In-Amplifier based Data Acquisition System has been used for nondestructive beam intensity and position diagnostic at the Big Karl beam line. First tests have demonstrated possibility to measure current and position of the 10 nA DC beam using this technique. Since relatively long time cyclotron users were occasionally disturbed by unwanted 33 Hz noise at the output of the cyclotron. Using non-contact laser vibration measurements system OMETRON S16, vibrations in this frequency range were detected on the internal elements of the HF-System. The source of these vibrations, located in the cyclotron bunker, have been identified and removed. In this contribution, the status of the JULIC cyclotron diagnostic system upgrade project will be presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO012
About •	Received ※ 31 December 2022 — Revised ※ 18 January 2023 — Accepted ※ 01 February 2023 — Issue date ※ 14 April 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPO012

An Embedded Beam Diagnostic Electronics for 230 MeV Superconducting Cyclotron Radial Probe and Scanning Wires

electron, electronics, cyclotron, embedded

80

T.Y. Jiang, P. Liu, X. Mu, Q.Q. Song, Y. Wang, Z.G. Yin, T.J. Zhang
CIAE, Beijing, People’s Republic of China

For the 230MeV superconducting cyclotron, once again, the differential radial probe has been proven to be crucial for the beam commission procedure. It can provide various information about the particles inside the cyclotron, such as the vertical position, the relative intensity as well as the oscillation frequency and radius, etc. In practice, however, the electronics system suffered from the leaking alternating RF field as well as the static magnetic field. Besides the EM shielding, an absorptive high-frequency filter has been included as the first element of the readout electronics. A high dynamic range readout electronic unit has been included to adapt to the fluctuation of the beam in the hole commissioning phase. The electronics box is designed as a network-attached embedded device so that it can be powered by a POE switch and transmits measurement results via MODBUS protocol. A dedicated digital signal processor and calibration units are also included, together with the ADCs, to facilitate the daily calibration process. The same electronics are used for the beamline wire scan system to determine the position of the beam, with a small improvement at a lower range. The design of this multi-purpose beam diagnostics electronics will be reviewed in this paper, together with several measurement results.
zhiguoyin@ciae.ac.cn

Poster MOPO012 [0.721 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO012

About •

Received ※ 01 January 2023 — Revised ※ 27 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 27 April 2023

Cite •

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

WEPO012

Upgrade of Beam Diagnostic Systems at JULIC Cyclotron

cyclotron, operation, controls, experiment

231

Y. Valdau, O. Felden, R. Gebel, U.G. Giesen, R.L. Lohoff, H. Soltner
FZJ, Jülich, Germany
N.-O. Fröhlich
DESY, Hamburg, Germany
P.J. Niedermayer
GSI, Darmstadt, Germany

The cyclotron JULIC is used as injector for the COSY storage ring since almost 30 years. Beams of polarized and unpolarised H⁻ and D- ions are routinely accelerated using cyclotron HF system up to 45 and 55 MeV, respectively. Meanwhile, low energy beams from JULIC become more frequently used by the experimentalists, especially at the new low energy beam line, which connects cyclotron with the large Big Karl experimental hall. To meet the requirements of the cyclotron users a diagnostic system upgrade program has been started at the JULIC cyclotron. All destructive beam diagnostic systems (Faraday Cups) have been equipped with a new produced by CAEN TetrAMM based beam diagnostic systems. All TetrAMM devices are implemented into the common COSY Control System with EPICS readout and archiving environment. The cyclotron NMR field control system has been upgraded using the newest sensor from Metrolab (PT2026), which allows operation in complete field range of the JULIC cyclotron, without changing the sensor. A new Lock In-Amplifier based Data Acquisition System has been used for nondestructive beam intensity and position diagnostic at the Big Karl beam line. First tests have demonstrated possibility to measure current and position of the 10 nA DC beam using this technique. Since relatively long time cyclotron users were occasionally disturbed by unwanted 33 Hz noise at the output of the cyclotron. Using non-contact laser vibration measurements system OMETRON S16, vibrations in this frequency range were detected on the internal elements of the HF-System. The source of these vibrations, located in the cyclotron bunker, have been identified and removed. In this contribution, the status of the JULIC cyclotron diagnostic system upgrade project will be presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO012

About •

Received ※ 31 December 2022 — Revised ※ 18 January 2023 — Accepted ※ 01 February 2023 — Issue date ※ 14 April 2023

Cite •

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