HB2023 - List of Authors (Podadera, I.)

Paper	Title	Page
TUA3I2	Measurements of Momentum Halo Due to the Reduced RFQ Voltage During the LIPAc Beam Commissioning	112
	K. Hirosawa, A. De Franco, K. Hasegawa, K. Kondo, S. Kwon, K. Masuda, A. Mizuno, M. Sugimoto QST Rokkasho, Aomori, Japan F. Bénédetti CEA-DRF-IRFU, France Y. Carin, H. Dzitko, D. Gex, I. Moya, F. Scantamburlo F4E, Germany J.C. Morales Vega Consorcio IFMIF-DONES España, Granada, Spain I. Podadera CIEMAT, Madrid, Spain
	The Linear IFMIF Prototype Accelerator, LIPAc, is being commissioned aiming in particular at validating the RFQ up to 5MeV beam acceleration. Eventually, the nominal beam of 5 MeV-125 mA in 1 ms/1 Hz pulsed mode was achieved in 2019. The beam operation has been resumed since July 2023 after long maintenance including recovery from unexpected problems in the RFQ RF system. This new phase aims at the commissioning of the full configuration except SRF linac, which is replaced by a temporary beam transport line. Focusing on the RFQ behavior, it will be interesting to operate it at higher duty especially for longer pulses. Indeed, a beam simulation study suggested that the beam extracted from the RFQ includes considerable momentum halo when the RFQ voltage reduces by a few percent, with a slight decrease of mean energy. It can be a potential source of quench like the mismatched beam in the cryomodule. This could be studied measuring the energy from the Time-of-Flight among multiple BPMs while monitoring beam loss around the dipole, where momentum halo should be lost. During the upcoming commissioning, we propose to study them by scanning the RFQ voltage.
	Slides TUA3I2 [4.465 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA3I2
About •	Received ※ 29 September 2023 — Revised ※ 06 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 29 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRC1I2	High Beam Current Operation with Beam Diagnostics at LIPAc	649
	S. Kwon, T. Akagi, A. De Franco, K. Hirosawa, K. Kondo, K. Masuda, M. Ohta QST Rokkasho, Aomori, Japan F. Bénédetti, Y. Carin, F. Cismondi, D. Gex IFMIF/EVEDA, Rokkasho, Japan B. Bolzon, N. Chauvin CEA-IRFU, Gif-sur-Yvette, France D. Jimenez-Rey, I. Podadera, A. Rodríguez Páramo, V. Villamayor CIEMAT, Madrid, Spain L. Maindive UGR, Granada, Spain J. Marroncle CEA-DRF-IRFU, France J.C. Morales Vega, I. Podadera Consorcio IFMIF-DONES España, Granada, Spain M. Poggi INFN/LNL, Legnaro (PD), Italy
	The Linear IFMIF Prototype Accelerator (LIPAc) is under commissioning in Rokkasho Fusion Institute in Japan and aims to accelerate 125 mA D⁺ at 9 MeV in CW mode for validating the IFMIF accelerator design. To insure a fine characterization and tuning of the machine many beam diagnostics are installed such as CTs, profile/position/loss/bunch length monitors spanning from Injector to the beam dump (BD). The beam operations in 1.0 ms pulsed D⁺ at 5 MeV was successfully completed with a low power BD (Phase B) in 2019. Despite the challenges posed by the pandemic, the crucial transition to a new linac configuration was also finalized to enable operation in 1.0 ms to CW D⁺ at 5 MeV with the high-power BD (Phase B+). Thanks to the efforts of the entire team, the 1st beam operation of Phase B+ was carried out in 2021. We present the experiences and challenges encountered during the beam operations, particularly the findings from the interceptive devices to measure the beam profile and emittance using tungsten wires rackets, SEMGrid. We also discuss the quick results on other beam diagnostics from the beam operation of Phase B+ toward HDC, which are currently conducting in this Summer.
	Slides FRC1I2 [9.323 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-FRC1I2
About •	Received ※ 02 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 23 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEC1C2	Challenges of Target and Irradiation Diagnostics of the IFMIF-DONES Facility	210
	C. Torregrosa, J. Maestre, A. Roldán, J. Valenzuela, I. Álvarez Castro UGR, Granada, Spain F. Arbeiter, Y.F. Qiu KIT, Eggenstein-Leopoldshafen, Germany S. Becerril-Jarque, A. Ibarra, I. Podadera Consorcio IFMIF-DONES España, Granada, Spain B. Brenneis Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany L. Buligins IPUL, Salaspils, Latvia J. Castellanos Universidad de Castilla-La Mancha, Ciudad Real, Spain N. Chauvin CEA-IRFU, Gif-sur-Yvette, France S. Fiore CERN, GENEVA, Switzerland D. Jimenez-Rey, F. Mota, C. Oliver, D. Regidor, C. de la Morena CIEMAT, Madrid, Spain J. Martínez, P. Matia-Hernando, T. Siegel ASE Optics, El Prat De Llobregat, Spain F.S. Nitti ENEA Brasimone, Centro Ricerche Brasimone, Camugnano, BO, Italy T. Tadic RBI, Zagreb, Croatia U. Wiacek IFJ-PAN, Kraków, Poland
	Funding: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme Grant Agreement No 101052200 EUROfusion IFMIF-DONES will be a first-class scientific infrastructure consisting of an accelerator-driven neutron source delivering 1e17 n/s with a broad peak at 14 MeV. Such neutron flux will be created by impinging a continuous wave 125 mA, 40 MeV, 5 MW deuteron beam onto a liquid Li jet target, circulating at 15 m/s. Material specimens subjected to neutron irradiation will be placed a few millimeters downstream. Some of the most challenging technological aspects of the facility are the Diagnostics to monitor the Li jet, beam parameters on target, and characterization of the neutron irradiation field, with transversal implications in the scientific exploitation, machine protection and safety. Multiple solutions are foreseen, considering among others, Li jet thickness measurement methods based on optical metrology and millimeter-wave radar techniques, Li electromagnetic flowmeters, beam footprint measurements based on residual gas excitation, online neutron detectors such as SPNDs and micro-fission chambers, as well as offline neutron fluence measurements by activation foils or spheres. This contribution provides an overview of these aspects and the associated R&D activities.
	Slides WEC1C2 [4.676 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-WEC1C2
About •	Received ※ 11 October 2023 — Accepted ※ 12 October 2023 — Issued ※ 14 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Measurements of Momentum Halo Due to the Reduced RFQ Voltage During the LIPAc Beam Commissioning

112

K. Hirosawa, A. De Franco, K. Hasegawa, K. Kondo, S. Kwon, K. Masuda, A. Mizuno, M. Sugimoto
QST Rokkasho, Aomori, Japan
F. Bénédetti
CEA-DRF-IRFU, France
Y. Carin, H. Dzitko, D. Gex, I. Moya, F. Scantamburlo
F4E, Germany
J.C. Morales Vega
Consorcio IFMIF-DONES España, Granada, Spain
I. Podadera
CIEMAT, Madrid, Spain

The Linear IFMIF Prototype Accelerator, LIPAc, is being commissioned aiming in particular at validating the RFQ up to 5MeV beam acceleration. Eventually, the nominal beam of 5 MeV-125 mA in 1 ms/1 Hz pulsed mode was achieved in 2019. The beam operation has been resumed since July 2023 after long maintenance including recovery from unexpected problems in the RFQ RF system. This new phase aims at the commissioning of the full configuration except SRF linac, which is replaced by a temporary beam transport line. Focusing on the RFQ behavior, it will be interesting to operate it at higher duty especially for longer pulses. Indeed, a beam simulation study suggested that the beam extracted from the RFQ includes considerable momentum halo when the RFQ voltage reduces by a few percent, with a slight decrease of mean energy. It can be a potential source of quench like the mismatched beam in the cryomodule. This could be studied measuring the energy from the Time-of-Flight among multiple BPMs while monitoring beam loss around the dipole, where momentum halo should be lost. During the upcoming commissioning, we propose to study them by scanning the RFQ voltage.

Slides TUA3I2 [4.465 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA3I2

About •

Received ※ 29 September 2023 — Revised ※ 06 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 29 October 2023

Cite •

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

FRC1I2

High Beam Current Operation with Beam Diagnostics at LIPAc

649

S. Kwon, T. Akagi, A. De Franco, K. Hirosawa, K. Kondo, K. Masuda, M. Ohta
QST Rokkasho, Aomori, Japan
F. Bénédetti, Y. Carin, F. Cismondi, D. Gex
IFMIF/EVEDA, Rokkasho, Japan
B. Bolzon, N. Chauvin
CEA-IRFU, Gif-sur-Yvette, France
D. Jimenez-Rey, I. Podadera, A. Rodríguez Páramo, V. Villamayor
CIEMAT, Madrid, Spain
L. Maindive
UGR, Granada, Spain
J. Marroncle
CEA-DRF-IRFU, France
J.C. Morales Vega, I. Podadera
Consorcio IFMIF-DONES España, Granada, Spain
M. Poggi
INFN/LNL, Legnaro (PD), Italy

The Linear IFMIF Prototype Accelerator (LIPAc) is under commissioning in Rokkasho Fusion Institute in Japan and aims to accelerate 125 mA D⁺ at 9 MeV in CW mode for validating the IFMIF accelerator design. To insure a fine characterization and tuning of the machine many beam diagnostics are installed such as CTs, profile/position/loss/bunch length monitors spanning from Injector to the beam dump (BD). The beam operations in 1.0 ms pulsed D⁺ at 5 MeV was successfully completed with a low power BD (Phase B) in 2019. Despite the challenges posed by the pandemic, the crucial transition to a new linac configuration was also finalized to enable operation in 1.0 ms to CW D⁺ at 5 MeV with the high-power BD (Phase B+). Thanks to the efforts of the entire team, the 1st beam operation of Phase B+ was carried out in 2021. We present the experiences and challenges encountered during the beam operations, particularly the findings from the interceptive devices to measure the beam profile and emittance using tungsten wires rackets, SEMGrid. We also discuss the quick results on other beam diagnostics from the beam operation of Phase B+ toward HDC, which are currently conducting in this Summer.

Slides FRC1I2 [9.323 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-FRC1I2

About •

Received ※ 02 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 23 October 2023

Cite •

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

WEC1C2

Challenges of Target and Irradiation Diagnostics of the IFMIF-DONES Facility

210

C. Torregrosa, J. Maestre, A. Roldán, J. Valenzuela, I. Álvarez Castro
UGR, Granada, Spain
F. Arbeiter, Y.F. Qiu
KIT, Eggenstein-Leopoldshafen, Germany
S. Becerril-Jarque, A. Ibarra, I. Podadera
Consorcio IFMIF-DONES España, Granada, Spain
B. Brenneis
Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
L. Buligins
IPUL, Salaspils, Latvia
J. Castellanos
Universidad de Castilla-La Mancha, Ciudad Real, Spain
N. Chauvin
CEA-IRFU, Gif-sur-Yvette, France
S. Fiore
CERN, GENEVA, Switzerland
D. Jimenez-Rey, F. Mota, C. Oliver, D. Regidor, C. de la Morena
CIEMAT, Madrid, Spain
J. Martínez, P. Matia-Hernando, T. Siegel
ASE Optics, El Prat De Llobregat, Spain
F.S. Nitti
ENEA Brasimone, Centro Ricerche Brasimone, Camugnano, BO, Italy
T. Tadic
RBI, Zagreb, Croatia
U. Wiacek
IFJ-PAN, Kraków, Poland

Funding: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme Grant Agreement No 101052200 EUROfusion
IFMIF-DONES will be a first-class scientific infrastructure consisting of an accelerator-driven neutron source delivering 1e17 n/s with a broad peak at 14 MeV. Such neutron flux will be created by impinging a continuous wave 125 mA, 40 MeV, 5 MW deuteron beam onto a liquid Li jet target, circulating at 15 m/s. Material specimens subjected to neutron irradiation will be placed a few millimeters downstream. Some of the most challenging technological aspects of the facility are the Diagnostics to monitor the Li jet, beam parameters on target, and characterization of the neutron irradiation field, with transversal implications in the scientific exploitation, machine protection and safety. Multiple solutions are foreseen, considering among others, Li jet thickness measurement methods based on optical metrology and millimeter-wave radar techniques, Li electromagnetic flowmeters, beam footprint measurements based on residual gas excitation, online neutron detectors such as SPNDs and micro-fission chambers, as well as offline neutron fluence measurements by activation foils or spheres. This contribution provides an overview of these aspects and the associated R&D activities.

Slides WEC1C2 [4.676 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-WEC1C2

About •

Received ※ 11 October 2023 — Accepted ※ 12 October 2023 — Issued ※ 14 October 2023

Cite •

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