IBIC2019 - List of Keywords (LEBT)

Paper	Title	Other Keywords	Page
MOPP044	Status of the Faraday Cups for the ESS linac	DTL, proton, MEBT, 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)

WECO04	Commissioning of the Non-invasive Profile Monitors for the ESS LEBT	emittance, MMI, alignment, solenoid	495
	C.A. Thomas, J. Etxeberria, S. Haghtalab, H. Kocevar, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian ESS, Lund, Sweden
	In the Low Energy Beam Transport (LEBT) of the European Spallation Source (ESS) Linac, a specific Non-invasive Profile Monitor (NPM) has been designed to primarily monitor beam position monitor with 100 µm accuracy, and in addition enable beam profile and size measurement. We present the first measurement results using NPM during the commissioning of the LEBT. The measurement results conclude the beam position as well as the angle of the beam. The performance of the measurement is discussed and compared to the required accuracy for the position measurement. In addition, the profile of the beam along the propagation axis is reported, as measured for part or the full pulse transported in the LEBT. The fidelity of the reported profile will be discussed as function of the system sensitivity and image signal to noise ratio.
	Slides WECO04 [11.779 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO04
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP032	Beam Based Alignment of Elements and Source at the ESS Low Energy Beam Transport Line	solenoid, simulation, MMI, alignment	600
	N. Milas, M. Eshraqi, B. Gålander, Y. Levinsen, R. Miyamoto, E. Nilsson, D.C. Plostinar ESS, Lund, Sweden
	The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be the world’s most powerful linear accelerator driving a neutron spallation source, with an average power of 5 MW at 2.0 GeV. The first protons were accelerated at the ESS site during the commissioning of the ion source and low energy beam transport (LEBT), that started in September 2018 and ran until July 2019. Misalignments of the elements in the LEBT can have a strong impact on the final current transmission of the low energy part. In this paper, we present a way to isolate and measure tilts of the elements and the initial centroid divergence of the source. We also present initial test measurements for the ESS LEBT and discuss how to extend the method to other facilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP032
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPP044

Status of the Faraday Cups for the ESS linac

DTL, proton, MEBT, 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)

WECO04

Commissioning of the Non-invasive Profile Monitors for the ESS LEBT

emittance, MMI, alignment, solenoid

495

C.A. Thomas, J. Etxeberria, S. Haghtalab, H. Kocevar, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian
ESS, Lund, Sweden

In the Low Energy Beam Transport (LEBT) of the European Spallation Source (ESS) Linac, a specific Non-invasive Profile Monitor (NPM) has been designed to primarily monitor beam position monitor with 100 µm accuracy, and in addition enable beam profile and size measurement. We present the first measurement results using NPM during the commissioning of the LEBT. The measurement results conclude the beam position as well as the angle of the beam. The performance of the measurement is discussed and compared to the required accuracy for the position measurement. In addition, the profile of the beam along the propagation axis is reported, as measured for part or the full pulse transported in the LEBT. The fidelity of the reported profile will be discussed as function of the system sensitivity and image signal to noise ratio.

Slides WECO04 [11.779 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO04

About •

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

Export •

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

WEPP032

Beam Based Alignment of Elements and Source at the ESS Low Energy Beam Transport Line

solenoid, simulation, MMI, alignment

600

N. Milas, M. Eshraqi, B. Gålander, Y. Levinsen, R. Miyamoto, E. Nilsson, D.C. Plostinar
ESS, Lund, Sweden

The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be the world’s most powerful linear accelerator driving a neutron spallation source, with an average power of 5 MW at 2.0 GeV. The first protons were accelerated at the ESS site during the commissioning of the ion source and low energy beam transport (LEBT), that started in September 2018 and ran until July 2019. Misalignments of the elements in the LEBT can have a strong impact on the final current transmission of the low energy part. In this paper, we present a way to isolate and measure tilts of the elements and the initial centroid divergence of the source. We also present initial test measurements for the ESS LEBT and discuss how to extend the method to other facilities.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP032

About •

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

Export •

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