IBIC2019 - List of Authors (Grandsaert, T.J.)

Paper	Title	Page
MOPP023	Ionisation Chamber Based Beam Loss Monitoring System for the ESS Linac	136
	I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, T.J. Grandsaert, V. Grishin, T.J. Shea ESS, Lund, Sweden W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik TUL-DMCS, Łódź, Poland
	The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. One of the most critical elements for the protection of an accelerator is its Beam Loss Monitoring (BLM) system. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the Ionisation Chamber based BLM (ICBLM). Several test campaigns have been performed at various facilities. Results of these tests will be presented here together with an overview of the ESS ICBLM system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP023
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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MOPP044	Status of the Faraday Cups for the ESS linac	205
	E.M. Donegani, C.S. Derrez, T.J. Grandsaert, T.J. Shea ESS, Lund, Sweden I. Bustinduy, A. Rodríguez Páramo ESS Bilbao, Zamudio, Spain
	The European Spallation Source (ESS) will be a 5 MW pulsed neutron source, relying on a 2 GeV linac delivering 2.86 ms long pulses with 14 Hz repetition rate. During the commissioning and the tuning phases of the ESS linac, four Faraday Cups (FC) serve as beam dumps and provide an absolute measurement of the proton beam current. This contribution summarizes the challenges in the design and production of all the FCs mainly requiring: - Thermo-mechanical analysis to keep heat load and mechanical stress below the mechanical limits; - Inclusion of an electron repeller to prevent the escape of secondary charged particles from the cup that would limit the accuracy of the current measurements; - Monte Carlo simulations to compute material activation, dose at contact and corresponding necessary shielding; - Design of high-resolution detection circuits for low current to fulfill the requirements on bandwidth, gain and noise. In addition, the performance of the LEBT FC during the commissioning of the ion source and LEBT is reported. The LEBT FC system is under continuous improvement and serves as benchmark for the protection from unwanted operation, and in case of actuator or cooling faults.
	Poster MOPP044 [1.121 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP044
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Ionisation Chamber Based Beam Loss Monitoring System for the ESS Linac

136

I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, T.J. Grandsaert, V. Grishin, T.J. Shea
ESS, Lund, Sweden
W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik
TUL-DMCS, Łódź, Poland

The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. One of the most critical elements for the protection of an accelerator is its Beam Loss Monitoring (BLM) system. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the Ionisation Chamber based BLM (ICBLM). Several test campaigns have been performed at various facilities. Results of these tests will be presented here together with an overview of the ESS ICBLM system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP023

About •

paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

Export •

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

MOPP044

Status of the Faraday Cups for the ESS linac

205

E.M. Donegani, C.S. Derrez, T.J. Grandsaert, T.J. Shea
ESS, Lund, Sweden
I. Bustinduy, A. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain

The European Spallation Source (ESS) will be a 5 MW pulsed neutron source, relying on a 2 GeV linac delivering 2.86 ms long pulses with 14 Hz repetition rate. During the commissioning and the tuning phases of the ESS linac, four Faraday Cups (FC) serve as beam dumps and provide an absolute measurement of the proton beam current. This contribution summarizes the challenges in the design and production of all the FCs mainly requiring: - Thermo-mechanical analysis to keep heat load and mechanical stress below the mechanical limits; - Inclusion of an electron repeller to prevent the escape of secondary charged particles from the cup that would limit the accuracy of the current measurements; - Monte Carlo simulations to compute material activation, dose at contact and corresponding necessary shielding; - Design of high-resolution detection circuits for low current to fulfill the requirements on bandwidth, gain and noise. In addition, the performance of the LEBT FC during the commissioning of the ion source and LEBT is reported. The LEBT FC system is under continuous improvement and serves as benchmark for the protection from unwanted operation, and in case of actuator or cooling faults.

Poster MOPP044 [1.121 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP044

About •

paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

Export •

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