MEDSI2023 - List of Authors (Casas, J.J.)

Paper	Title	Page
TUOBM06	MINERVA, a New X-ray Facility for the Characterization of the ATHENA Mirror Modules at the ALBA Synchrotron	28
	A. Carballedo, J.J. Casas, C. Colldelram, A. Crisol, G. Cuní, D. Heinis, J. Nicolàs, A. Sánchez, N. Valls Vidal ALBA-CELLS, Cerdanyola del Vallès, Spain N. Barrière, M.J. Collon, G. Vacanti Cosine Measurement Systems, Warmond, The Netherlands M. Bavdaz, I. Ferreira ESA-ESTEC, Noordwijk, The Netherlands L. Cibic, M. Krumrey, D. Skroblin PTB, Berlin, Germany
	Funding: MINERVA is funded by the European Space Agency (ESA) and the Spanish Ministry of Science and Innovation. In this paper we present the newly built beamline MINERVA, an X-ray facility at the ALBA synchrotron. The beamline has been designed to support the development of the X ray observatory ATHENA (Advanced Telescope for High Energy Astrophysics). MINERVA will host the necessary metrology equipment to integrate the stacks produced by cosine in a mirror module (MM) and characterize their optical performances. The optical and mechanical design is based on the XPBF 2.0 from the Physikalisch-Technische Bundesanstalt (PTB), at BESSY II already in use to this effect and its construction is meant to significantly augment the capability to produce MM. The development of MINERVA has addressed the need for improved technical specifications, overcome existing limitations and achieve enhanced mechanical performances. We describe the design, construction process and implementation of Minerva that lasted three years. Even though the beamline is still under a commissioning phase, we expose tests and analysis that have been recently performed, remarking the improvements accomplished and the challenges to overcome, in order to reach the operational readiness for the mirror modules mass production.
	Slides TUOBM06 [47.675 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM06
About •	Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 February 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP034	ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions	199
	O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez ALBA-CELLS, Cerdanyola del Vallès, Spain
	The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.
	Poster WEPPP034 [0.616 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP035	Design and Fluid Dynamics Study of a Recoverable Helium Sample Environment System for Optimal Data Quality in the New Microfocus MX Beamline at the ALBA Synchrotron Light Source	203
	M. Quispe, J.J. Casas, C. Colldelram, D. Garriga, N. González, J. Juanhuix, J. Nicolàs, Y. Nikitin ALBA-CELLS, Cerdanyola del Vallès, Spain M. Rabasa ESEIAAT, Terrassa, Spain
	XAIRA is the new microfocus MX beamline under construction at the ALBA Synchrotron Light Source. For its experiments, the quality will be optimized by enclosing all the end station elements, including the diffractometer in a helium chamber, so that the background due to air scattering is minimized and the beam is not attenuated in the low photon energy range, down to 4 keV. This novel type of chamber comes with new challenges from the point of view of stability control and operation in low pressure conditions while enabling the recovery of the consumed helium. In particular, it is planned to collect the helium gas with a purity > 99.5% and then to recover the gas at the ALBA Helium Liquefaction Plant. Besides, the circuit includes a dedicated branch to recirculate the helium used by the goniometer bearing at the diffractometer. This paper describes the fluid dynamic conceptual design of the Helium chamber and its gas circuit, as well as numerical results based on one-dimensional studies and Computational Fluid Dynamics (CFD).
	Poster WEPPP035 [1.794 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP035
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 June 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP016	Numerical and Experimental Studies to Evaluate the Conservative Factor of the Convective Heat Transfer Coefficient Applied to the Design of Components in Particle Accelerators	306
	M. Quispe, J.J. Casas, C. Colldelram, M. Sanchez ALBA-CELLS, Cerdanyola del Vallès, Spain H. Bello La Romanica, Barberà del Vallès, Sabadell, Spain R. Capdevila, M. Rabasa, G.A. Raush ESEIAAT, Terrassa, Spain S. Grozavu Universidad Politecnica de Madrid, ETSI Aeronauticos, Madrid, Spain
	The fluid boundary condition applied to the design of components in Particle Accelerators is calculated as a global variable through experimental correlations coming from the literature. This variable, defined as the Convective Heat Transfer Coefficient, is obtained using the correlations of Dittus and Boelter (1930), Sieder and Tate (1936), Petukhov (1970), Gnielinski (1976), among others. Although the designs based on these correlations work properly, the hypothesis of the present study proposes that the effectiveness of these approximations is due to the existence of a significant and unknown conservative factor between the real phenomenon and the global variable. To quantify this conservative factor, this work presents research based on Computational Fluid Dynamics (CFD) and experimental studies. In particular, recent investigations carried out at ALBA confirm in a preliminary way our hypotheses for circular pipes under fully and non-fully developed flow conditions. The conclusions of this work indicate that we could dissipate the required heat with a flowrate lower than that obtained by applying the experimental correlations.
	Poster THPPP016 [1.419 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP016
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

MINERVA, a New X-ray Facility for the Characterization of the ATHENA Mirror Modules at the ALBA Synchrotron

28

A. Carballedo, J.J. Casas, C. Colldelram, A. Crisol, G. Cuní, D. Heinis, J. Nicolàs, A. Sánchez, N. Valls Vidal
ALBA-CELLS, Cerdanyola del Vallès, Spain
N. Barrière, M.J. Collon, G. Vacanti
Cosine Measurement Systems, Warmond, The Netherlands
M. Bavdaz, I. Ferreira
ESA-ESTEC, Noordwijk, The Netherlands
L. Cibic, M. Krumrey, D. Skroblin
PTB, Berlin, Germany

Funding: MINERVA is funded by the European Space Agency (ESA) and the Spanish Ministry of Science and Innovation.
In this paper we present the newly built beamline MINERVA, an X-ray facility at the ALBA synchrotron. The beamline has been designed to support the development of the X ray observatory ATHENA (Advanced Telescope for High Energy Astrophysics). MINERVA will host the necessary metrology equipment to integrate the stacks produced by cosine in a mirror module (MM) and characterize their optical performances. The optical and mechanical design is based on the XPBF 2.0 from the Physikalisch-Technische Bundesanstalt (PTB), at BESSY II already in use to this effect and its construction is meant to significantly augment the capability to produce MM. The development of MINERVA has addressed the need for improved technical specifications, overcome existing limitations and achieve enhanced mechanical performances. We describe the design, construction process and implementation of Minerva that lasted three years. Even though the beamline is still under a commissioning phase, we expose tests and analysis that have been recently performed, remarking the improvements accomplished and the challenges to overcome, in order to reach the operational readiness for the mirror modules mass production.

Slides TUOBM06 [47.675 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM06

About •

Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 09 February 2024

Cite •

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

WEPPP034

ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions

199

O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez
ALBA-CELLS, Cerdanyola del Vallès, Spain

The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.

Poster WEPPP034 [0.616 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034

About •

Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024

Cite •

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

WEPPP035

Design and Fluid Dynamics Study of a Recoverable Helium Sample Environment System for Optimal Data Quality in the New Microfocus MX Beamline at the ALBA Synchrotron Light Source

203

M. Quispe, J.J. Casas, C. Colldelram, D. Garriga, N. González, J. Juanhuix, J. Nicolàs, Y. Nikitin
ALBA-CELLS, Cerdanyola del Vallès, Spain
M. Rabasa
ESEIAAT, Terrassa, Spain

XAIRA is the new microfocus MX beamline under construction at the ALBA Synchrotron Light Source. For its experiments, the quality will be optimized by enclosing all the end station elements, including the diffractometer in a helium chamber, so that the background due to air scattering is minimized and the beam is not attenuated in the low photon energy range, down to 4 keV. This novel type of chamber comes with new challenges from the point of view of stability control and operation in low pressure conditions while enabling the recovery of the consumed helium. In particular, it is planned to collect the helium gas with a purity > 99.5% and then to recover the gas at the ALBA Helium Liquefaction Plant. Besides, the circuit includes a dedicated branch to recirculate the helium used by the goniometer bearing at the diffractometer. This paper describes the fluid dynamic conceptual design of the Helium chamber and its gas circuit, as well as numerical results based on one-dimensional studies and Computational Fluid Dynamics (CFD).

Poster WEPPP035 [1.794 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP035

About •

Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 June 2024

Cite •

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

THPPP016

Numerical and Experimental Studies to Evaluate the Conservative Factor of the Convective Heat Transfer Coefficient Applied to the Design of Components in Particle Accelerators

306

M. Quispe, J.J. Casas, C. Colldelram, M. Sanchez
ALBA-CELLS, Cerdanyola del Vallès, Spain
H. Bello
La Romanica, Barberà del Vallès, Sabadell, Spain
R. Capdevila, M. Rabasa, G.A. Raush
ESEIAAT, Terrassa, Spain
S. Grozavu
Universidad Politecnica de Madrid, ETSI Aeronauticos, Madrid, Spain

The fluid boundary condition applied to the design of components in Particle Accelerators is calculated as a global variable through experimental correlations coming from the literature. This variable, defined as the Convective Heat Transfer Coefficient, is obtained using the correlations of Dittus and Boelter (1930), Sieder and Tate (1936), Petukhov (1970), Gnielinski (1976), among others. Although the designs based on these correlations work properly, the hypothesis of the present study proposes that the effectiveness of these approximations is due to the existence of a significant and unknown conservative factor between the real phenomenon and the global variable. To quantify this conservative factor, this work presents research based on Computational Fluid Dynamics (CFD) and experimental studies. In particular, recent investigations carried out at ALBA confirm in a preliminary way our hypotheses for circular pipes under fully and non-fully developed flow conditions. The conclusions of this work indicate that we could dissipate the required heat with a flowrate lower than that obtained by applying the experimental correlations.

Poster THPPP016 [1.419 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP016

About •

Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 March 2024

Cite •

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