CYCLOTRONS2022 - List of Authors (Valdau, Y.)

Paper	Title	Page
WEPO012	Upgrade of Beam Diagnostic Systems at JULIC Cyclotron	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)

THPO005	JULIC - Driver Accelerator for HBS	303
	O. Felden, V. Kamerdzhiev FZJ, Jülich, Germany R. Gebel, K. Grigoryev, Y. Valdau GSI, Darmstadt, Germany
	At the Forschungszentrum Jülich (FZJ) the energy variable cyclotron JULIC is used as injector of the Cooler Synchrotron (COSY) and for low to medium current irradiations of different types. At the NESP-Target station a Target-Moderator-Reflector (TMR) -demonstrator of the proposed accelerator driven High Brilliance Neutron source (HBS) was set up with the Jülich Center of Neutron Science (JCNS). Beside showing the functionality of the TMR-Design the demonstrator gives the possibility to test new target materials, different types and concepts of moderators and at least the handling of irradiated targets and components. The TMR- target station is installed inside an Experimental area offering space for complex detector and component setups for nuclear and neutron related experiments like ToF-experiments or neutron imaging e.g. But it is used for other purposes like irradiation and electronic or detector tests as well. Additionally to the TMR, the extraction beamline from JULIC to the TMR was set up and equipped with a fast kicker and a 3-field permanent magnet, as foreseen in in HBS to deliver the beam to different target stations within a sophisticated pulsing scheme, synchronized with the beam pulsing done at JULIC, using fast deflection plates. This report briefly summarizes the history of JULIC and the activities for its future perspectives.
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-THPO005
About •	Received ※ 07 December 2022 — Revised ※ 18 January 2023 — Accepted ※ 17 February 2023 — Issue date ※ 27 February 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Upgrade of Beam Diagnostic Systems at JULIC Cyclotron

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)

THPO005

JULIC - Driver Accelerator for HBS

303

O. Felden, V. Kamerdzhiev
FZJ, Jülich, Germany
R. Gebel, K. Grigoryev, Y. Valdau
GSI, Darmstadt, Germany

At the Forschungszentrum Jülich (FZJ) the energy variable cyclotron JULIC is used as injector of the Cooler Synchrotron (COSY) and for low to medium current irradiations of different types. At the NESP-Target station a Target-Moderator-Reflector (TMR) -demonstrator of the proposed accelerator driven High Brilliance Neutron source (HBS) was set up with the Jülich Center of Neutron Science (JCNS). Beside showing the functionality of the TMR-Design the demonstrator gives the possibility to test new target materials, different types and concepts of moderators and at least the handling of irradiated targets and components. The TMR- target station is installed inside an Experimental area offering space for complex detector and component setups for nuclear and neutron related experiments like ToF-experiments or neutron imaging e.g. But it is used for other purposes like irradiation and electronic or detector tests as well. Additionally to the TMR, the extraction beamline from JULIC to the TMR was set up and equipped with a fast kicker and a 3-field permanent magnet, as foreseen in in HBS to deliver the beam to different target stations within a sophisticated pulsing scheme, synchronized with the beam pulsing done at JULIC, using fast deflection plates. This report briefly summarizes the history of JULIC and the activities for its future perspectives.

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-THPO005

About •

Received ※ 07 December 2022 — Revised ※ 18 January 2023 — Accepted ※ 17 February 2023 — Issue date ※ 27 February 2023

Cite •

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