MEDSI2023 - List of Keywords (impedance)

Paper	Title	Other Keywords	Page
TUPYP054	Mechanical Design of the Beam Gas Ionisation (BGI) Beam Profile Monitor for CERN Super Proton Synchrotron	vacuum, electron, detector, proton	114
	M.T. Ramos Garcia, W. Andreazza, P. Bestmann, H. Bursali, N.S. Chritin, W. Devauchelle, A. Harrison, G. Khatri, M. McLean, C. Pasquino, F. Sanda, P. Schwarz, J.W. Storey, R. Veness, W. Vollenberg, C. Vollinger CERN, Meyrin, Switzerland
	The Beam Gas Ionisation (BGI) instrument of the Proton Synchrotron (PS), presently installed and operational, has been re-designed for the Super Proton Synchrotron (SPS), the following machine along the Large Hadron Collider (LHC) injector chain at CERN accelerator complex. Using the same detection technology, Timepix3, the SPS-BGI infers the beam profile from the electrons created by the ionisation of rest gas molecules and accelerated onto an imaging detector. This measurement method will allow for continuous, non-destructive beam size measurement in the SPS. In view of the upgrade, the design has been simplified and validated for integration, radio-frequency & impedance, high-voltage and ultra-high vacuum compatibility.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP054
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 14 November 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP051	The Design of a 2 m Long Copper Light Extraction Vessel at Diamond Light Source for the Diamond-II Upgrade	vacuum, simulation, storage-ring, extraction	233
	V. Danielyan, M.P. Cox, R.T. Fielder, S.L. Hodbod, T. Lockwood, P.J. Vivian DLS, Oxfordshire, United Kingdom
	Challenges associated with the design are, firstly, the heat loads of I05 beamline upgrade involving the installation of a powerful and highly divergent APPLE-II Knot Insertion Device. Secondly, it is not easy to produce the required homogeneous NEG (non-evaporable getter) coating on the complex internal geometry of the vessel. Synchrotron light raytracing and thermal analysis has shown that an aluminium vessel with discrete copper absorbers was not capable of handling the high heat loads and it was decided to change to a copper vessel with large integrated absorbing surfaces. FEA analysis of the copper vessel shows the peak temperature is reduced from 446°C to 95°C for the copper vessel as compared to the aluminium vessel. NEG coating trials are currently in progress and will be followed by a full prototype. The minimum vertical aperture is 6 mm and the trials will show whether it can be reduced to 5 mm. The change from an aluminium vessel to a copper vessel will not only reduce the peak temperature of the vessel thereby making it a workable solution, but has the added benefits of improved vacuum performance, reduced beam impedance and reduced capital and operating cost.
	Poster WEPPP051 [1.861 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP051
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 02 June 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPYP054

Mechanical Design of the Beam Gas Ionisation (BGI) Beam Profile Monitor for CERN Super Proton Synchrotron

vacuum, electron, detector, proton

114

M.T. Ramos Garcia, W. Andreazza, P. Bestmann, H. Bursali, N.S. Chritin, W. Devauchelle, A. Harrison, G. Khatri, M. McLean, C. Pasquino, F. Sanda, P. Schwarz, J.W. Storey, R. Veness, W. Vollenberg, C. Vollinger
CERN, Meyrin, Switzerland

The Beam Gas Ionisation (BGI) instrument of the Proton Synchrotron (PS), presently installed and operational, has been re-designed for the Super Proton Synchrotron (SPS), the following machine along the Large Hadron Collider (LHC) injector chain at CERN accelerator complex. Using the same detection technology, Timepix3, the SPS-BGI infers the beam profile from the electrons created by the ionisation of rest gas molecules and accelerated onto an imaging detector. This measurement method will allow for continuous, non-destructive beam size measurement in the SPS. In view of the upgrade, the design has been simplified and validated for integration, radio-frequency & impedance, high-voltage and ultra-high vacuum compatibility.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP054

About •

Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 14 November 2023

Cite •

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

WEPPP051

The Design of a 2 m Long Copper Light Extraction Vessel at Diamond Light Source for the Diamond-II Upgrade

vacuum, simulation, storage-ring, extraction

233

V. Danielyan, M.P. Cox, R.T. Fielder, S.L. Hodbod, T. Lockwood, P.J. Vivian
DLS, Oxfordshire, United Kingdom

Challenges associated with the design are, firstly, the heat loads of I05 beamline upgrade involving the installation of a powerful and highly divergent APPLE-II Knot Insertion Device. Secondly, it is not easy to produce the required homogeneous NEG (non-evaporable getter) coating on the complex internal geometry of the vessel. Synchrotron light raytracing and thermal analysis has shown that an aluminium vessel with discrete copper absorbers was not capable of handling the high heat loads and it was decided to change to a copper vessel with large integrated absorbing surfaces. FEA analysis of the copper vessel shows the peak temperature is reduced from 446°C to 95°C for the copper vessel as compared to the aluminium vessel. NEG coating trials are currently in progress and will be followed by a full prototype. The minimum vertical aperture is 6 mm and the trials will show whether it can be reduced to 5 mm. The change from an aluminium vessel to a copper vessel will not only reduce the peak temperature of the vessel thereby making it a workable solution, but has the added benefits of improved vacuum performance, reduced beam impedance and reduced capital and operating cost.

Poster WEPPP051 [1.861 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP051

About •

Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 06 November 2023 — Issued ※ 02 June 2024

Cite •

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